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Document and Entity Information Document - shares	6 Months Ended
Document and Entity Information Document - shares	Jan. 31, 2014	Feb. 14, 2014
Document Information [Abstract]
Entity Registrant Name	Palo Alto Networks Inc
Entity Central Index Key	0001327567
Document Type	10-Q
Document Period End Date	Jan. 31, 2014
Amendment Flag	false
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2
Document Fiscal Year End Date	--07-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		74,064,857

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 31, 2014	Jul. 31, 2013
Current assets:
Cash and cash equivalents	$ 261,867	$ 310,614
Short-term investments	176,345	109,007
Accounts receivable, net of allowance for doubtful accounts of $466 and $51 at January 31, 2014 and July 31, 2013, respectively	86,090	87,461
Prepaid expenses and other current assets	30,985	22,617
Total current assets	555,287	529,699
Property and equipment, net	45,735	32,086
Long-term investments	63,105	17,314
Other assets	24,899	6,507
Total assets	689,026	585,606
Current liabilities:
Accounts payable	10,341	15,544
Accrued and other liabilities	20,425	14,609
Accrued compensation	29,713	22,004
Deferred revenue	202,330	153,945
Total current liabilities	262,809	206,102
Deferred revenue—non-current	122,261	95,285
Other long-term liabilities	19,512	11,799
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock; $0.0001 par value; 100,000 shares authorized; none issued and outstanding at January 31, 2014 and July 31, 2013	0	0
Common stock; $0.0001 par value; 1,000,000 shares authorized; 73,998 and 71,612 shares issued and outstanding at January 31, 2014 and July 31, 2013, respectively	7	7
Additional paid-in capital	441,475	381,703
Accumulated other comprehensive gain (loss)	43	(16)
Accumulated deficit	(157,081)	(109,274)
Total stockholders’ equity	284,444	272,420
Total liabilities and stockholders’ equity	$ 689,026	$ 585,606

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2014	Jul. 31, 2013
Current assets:
Allowance for doubtful accounts (in usd)	$ 466	$ 51
Stockholders' equity:
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common Stock, Shares, Issued (in shares)	73,998,000	71,612,000
Common Stock, Shares, Outstanding (in shares)	73,998,000	71,612,000

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Revenue:
Product	$ 80,823	$ 61,944	$ 156,308	$ 117,458
Services	60,245	34,555	112,940	64,975
Total revenue	141,068	96,499	269,248	182,433
Cost of revenue:
Product	20,221	16,636	38,175	31,052
Services	17,283	10,982	33,136	20,756
Total cost of revenue	37,504	27,618	71,311	51,808
Total gross profit	103,564	68,881	197,937	130,625
Operating expenses:
Research and development	24,253	15,495	44,146	28,807
Sales and marketing	76,734	45,796	144,100	88,403
General and administrative	39,733	9,747	53,858	18,703
Total operating expenses	140,720	71,038	242,104	135,913
Operating loss	(37,156)	(2,157)	(44,167)	(5,288)
Interest income	187	116	347	214
Other expense, net	(371)	(60)	(134)	(230)
Loss before income taxes	(37,340)	(2,101)	(43,954)	(5,304)
Provision for income taxes	2,606	512	3,853	824
Net loss	(39,946)	(2,613)	(47,807)	(6,128)
Net loss attributable to common stockholders	$ (39,946)	$ (2,613)	$ (47,807)	$ (6,128)
Net loss per share attributable to common stockholders, basic and diluted (in usd per share)	$ (0.55)	$ (0.04)	$ (0.66)	$ (0.09)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted (in shares)	72,854	67,651	72,260	67,225

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Net loss	$ (39,946)	$ (2,613)	$ (47,807)	$ (6,128)
Other comprehensive gain (loss), net of tax:
Change in unrealized gains (losses) on investments	48	16	69	(11)
Reclassification adjustment for realized net gains on investments included in net loss	(10)	0	(10)	0
Net change	38	16	59	(11)
Comprehensive loss	$ (39,908)	$ (2,597)	$ (47,748)	$ (6,139)

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

Net of tax amount of the income statement impact of the reclassification adjustment for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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- Definition

Net of tax amount of unrealized holding gain (loss) before reclassification adjustments and transfers on available-for-sale securities.

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+ Details

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Cash flows from operating activities
Net loss	$ (47,807)	$ (6,128)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	7,082	4,468
Amortization of investment premiums, net of accretion of purchase discounts	747	822
Share-based compensation for equity based awards	38,729	17,030
Excess tax benefit from share-based compensation	(674)	(106)
Changes in operating assets and liabilities:
Accounts receivable, net	1,371	(22,944)
Prepaid expenses and other assets	(6,207)	(7,290)
Accounts payable	(4,387)	1,716
Accrued and other liabilities	16,062	17,640
Deferred revenue	75,361	52,375
Net cash provided by operating activities	80,277	57,583
Cash flows from investing activities
Purchase of property, equipment, and other assets	(25,483)	(10,236)
Purchase of investments	(249,803)	(252,633)
Proceeds from sales of investments	6,630	13,491
Proceeds from maturities of investments	129,096	57,150
Acquisition of business, net of cash acquired	(10,102)	0
Net cash used in investing activities	(149,662)	(192,228)
Cash flows from financing activities
Excess tax benefit from share-based compensation	674	106
Proceeds from exercise of stock options	14,085	2,554
Proceeds from employee stock purchase plan	5,988	0
Repurchase of restricted common stock from terminated employees	(109)	(35)
Payment of initial public offering costs	0	(2,698)
Net cash provided by (used in) financing activities	20,638	(73)
Net decrease in cash and cash equivalents	(48,747)	(134,718)
Cash and cash equivalents—beginning of period	310,614	322,642
Cash and cash equivalents—end of period	$ 261,867	$ 187,924

Description of Business and Summary of Significant Accounting Policies	6 Months Ended
	Jan. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Summary of Significant Accounting Policies	Description of Business and Summary of Significant Accounting Policies Description of Business Palo Alto Networks, Inc. (the “Company,” “we,” “us,” or “our”), located in Santa Clara, California, was incorporated in March 2005 under the laws of the State of Delaware and commenced operations in April 2005. We offer a next-generation network security platform that allows enterprises, service providers, and government entities to secure their networks and safely enable the increasingly complex and rapidly growing number of applications running on their networks. The core of our platform is our Next-Generation Firewall that delivers application, user, and content visibility and control integrated within the firewall through our proprietary operating system, hardware, and software architecture. We primarily sell our products and services to end-customers through our channel partners and infrequently directly to end-customers. Our partners are supported by our sales and marketing organization in the Americas, in Europe, the Middle East, and Africa (EMEA), and in Asia Pacific and Japan (APAC). Basis of Presentation The accompanying condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, consistent in all material respects with those applied in our Annual Report on Form 10-K for the fiscal year ended July 31, 2013. The condensed consolidated financial statements include all adjustments necessary for a fair presentation of our quarterly results. All adjustments are of a normal recurring nature. We have made estimates and judgments affecting the amounts reported in our condensed consolidated financial statements and the accompanying notes. The actual results that we experience may differ materially from our estimates. Principles of Consolidation The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Summary of Significant Accounting Policies There have been no material changes to our significant accounting policies as of and for the three and six months ended January 31, 2014, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the fiscal year ended July 31, 2013, except for the inclusion of a policy related to business combinations and broadening our policy on the Impairment of Long-Lived Assets to include policies related to goodwill and intangible assets. Business Combinations We include the results of operations of the businesses that we acquire as of the respective dates of acquisition. We allocate the fair value of the purchase price of our acquisitions to the tangible assets acquired, liabilities assumed, and intangible assets acquired, based on their estimated fair values. The excess of the purchase price over the fair values of these identifiable assets and liabilities is recorded as goodwill. Additional information existing as of the acquisition date but unknown to us may become known during the remainder of the measurement period, not to exceed 12 months from the acquisition date, which may result in changes to the amounts and allocations recorded. Goodwill, Intangible Assets, and Impairment of Long-Lived Assets Goodwill is evaluated for impairment on an annual basis in the fourth quarter of our fiscal year, and whenever events or changes in circumstances indicate the carrying value of goodwill may not be recoverable. We have elected to first assess qualitative factors to determine whether it is more likely than not that the fair value of our single reporting unit is less than its carrying amount. If we determine that it is more likely than not that the fair value of our single reporting unit is less than its carrying amount, then the two-step goodwill impairment test will be performed. The first step, identifying a potential impairment, compares the fair value of our single reporting unit with its carrying amount. If the carrying amount exceeds its fair value, the second step will be performed; otherwise, no further step is required. The second step, measuring the impairment loss, compares the implied fair value of the goodwill with the carrying amount of the goodwill. Any excess of the goodwill carrying amount over the implied fair value is recognized as an impairment loss. We evaluate events and changes in circumstances that could indicate carrying amounts of long-lived assets, including property and equipment and purchased intangible assets subject to amortization, may not be recoverable. When such events or changes in circumstances occur, we assess the recoverability of long-lived assets by determining whether or not the carrying amount of such assets will be recovered through undiscounted expected future cash flows. If the total of the future undiscounted cash flows is less than the carrying amount of an asset, we record an impairment loss for the amount by which the carrying amount of the asset exceeds the fair value of the asset. Recent Accounting Pronouncements In July 2013, the FASB issued ASU No. 2013-11, Income Taxes (Topic 740)-Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The standard requires us to present an unrecognized tax benefit as a reduction of a deferred tax asset for a net operating loss (NOL) carryforward or other tax credit carryforward when settlement in this manner is available under applicable tax law. The guidance is effective for us in the first quarter of fiscal 2015. We do not believe the adoption of this guidance will have a material impact on our condensed consolidated financial statements. In February 2013, the FASB issued Accounting Standards Update No. 2013-02, Comprehensive Income (Topic 220)-Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. The standard requires entities to present (either on the face of the income statement or in the notes) the effects on the line items of the income statement for amounts reclassified out of accumulated other comprehensive income. The guidance was effective for us in the first quarter of fiscal 2014. Our adoption of this guidance did not impact our financial statements as the guidance is related to disclosure only and we did not have significant reclassifications out of accumulated other comprehensive income.

Fair Value Measurements

6 Months Ended

Jan. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

We categorize assets and liabilities recorded at fair value on our condensed consolidated balance sheets based upon the level of judgment associated with inputs used to measure their fair value. The categories are as follows:


•	Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.


•	Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments.


•	Level 3—Inputs are unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation.

The following table presents the fair value of our financial assets and liabilities using the above input categories (in thousands):



	January 31, 2014								July 31, 2013
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents:
Certificates of deposit	$	—	$	—	$	—	$	—	$	1,822	$	—	$	—	$	1,822
U.S. government and agency securities	—		38,000		—		38,000		—		46,700		—		46,700
Money market funds	—		—		—		—		131,845		—		—		131,845
Total cash equivalents	—		38,000		—		38,000		133,667		46,700		—		180,367
Short-term investments:
Corporate debt securities	—		27,555		—		27,555		—		32,834		—		32,834
U.S. government and agency securities	—		148,790		—		148,790		—		76,173		—		76,173
Total short-term investments	—		176,345		—		176,345		—		109,007		—		109,007
Long-term investments:
Certificates of deposit	—		2,999		—		2,999		—		—		—		—
Corporate debt securities	—		18,879		—		18,879		—		12,317		—		12,317
U.S. government and agency securities	—		41,227		—		41,227		—		4,997		—		4,997
Total long-term investments	—		63,105		—		63,105		—		17,314		—		17,314
Other assets:
Restricted cash	1,220		—		—		1,220		1,221		—		—		1,221
Total other assets	1,220		—		—		1,220		1,221		—		—		1,221
Total assets measured at fair value	$	1,220	$	277,450	$	—	$	278,670	$	134,888	$	173,021	$	—	$	307,909

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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+ Details

Investments

6 Months Ended

Jan. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Investments

The following tables summarize our unrealized gains and losses and fair value of investments as of January 31, 2014 and July 31, 2013 (in thousands):



	January 31, 2014
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Certificates of deposit	$	3,000	$	—	$	(1	)	$	2,999
Corporate debt securities	46,419		23		(8		)	46,434
U.S. government and agency securities	227,988		35		(6		)	228,017
Total	$	277,407	$	58	$	(15	)	$	277,450



	July 31, 2013
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Certificates of deposit	$	1,822	$	—	$	—		$	1,822
Corporate debt securities	45,173		12		(34		)	45,151
U.S. government and agency securities	127,864		8		(2		)	127,870
Money market funds	131,845		—		—			131,845
Total	$	306,704	$	20	$	(36	)	$	306,688

The following tables present our investments that were in an unrealized loss position as of January 31, 2014 and July 31, 2013 (in thousands):



	January 31, 2014
	Less Than 12 Months					12 Months or Greater				Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Certificates of deposit	$	2,999	$	(1	)	$	—	$	—	$	2,999	$	(1	)
Corporate debt securities	16,834		(8		)	—		—		16,834		(8		)
U.S. government and agency securities	29,645		(6		)	—		—		29,645		(6		)
Total	$	49,478	$	(15	)	$	—	$	—	$	49,478	$	(15	)



	July 31, 2013
	Less Than 12 Months					12 Months or Greater				Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Corporate debt securities	$	31,429	$	(34	)	$	—	$	—	$	31,429	$	(34	)
U.S. government and agency securities	15,926		(2		)	—		—		15,926		(2		)
Total	$	47,355	$	(36	)	$	—	$	—	$	47,355	$	(36	)

Unrealized losses related to these investments are due to interest rate fluctuations as opposed to credit quality. In addition, we do not intend to sell and it is not more likely than not that we would be required to sell these investments before recovery of their amortized cost basis, which may be at maturity. As a result, there is no other-than-temporary impairment for these investments at January 31, 2014.

The following table summarizes the amortized cost and fair value of our investments as of January 31, 2014, by contractual years-to-maturity (in thousands):



	Amortized Cost		Fair Value
Due within one year	$	214,320	$	214,345
Due within one to two years	63,087		63,105
Total	$	277,407	$	277,450

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References

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-Glossary Debt Security
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+ Details

Acquisitions (Notes)

6 Months Ended

Jan. 31, 2014

Business Combinations [Abstract]

Acquisitions

Business Combination

On December 26, 2013, we completed our acquisition of Morta Security, Inc. ("Morta"), a privately-held cybersecurity company. We have accounted for this transaction as a business combination and exchanged total cash consideration of $10,345,000, of which $2,500,000 was withheld for Morta's indemnification obligations. Morta brings us a team of cybersecurity experts which will enhance the proven detection and prevention capabilities of our WildFire offering.

The following table summarizes our preliminary allocation of the purchase price based on the fair value of assets acquired and liabilities assumed (in thousands):



	Amount
Goodwill	$	10,094
Identified intangible assets	2,200
Net liabilities assumed	(1,949		)
Total	$	10,345

The following table presents details of the identified intangible assets acquired (in thousands, except years):



	Fair Value		Estimated Useful Life
In-process research and development held for defensive purposes	$	1,900	3 years
Other	300		2 years
Total	$	2,200

Morta’s operating results are included in our Condensed Consolidated Statements of Operations from the date of the acquisition and are considered immaterial for purposes of pro forma financial disclosures. Goodwill generated from this business combination is primarily attributable to human capital with threat intelligence experience and capabilities and is not tax deductible for U.S. federal income tax purposes.

Other Purchased Intangible Assets

On September 4, 2013 we entered into an agreement to purchase intellectual property for $5,000,000, which will be amortized over a weighted-average period of 13 years.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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-Name Statement of Financial Accounting Standard (FAS)
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+ Details

Goodwill and Intangible Assets

6 Months Ended

Jan. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Disclosure

Goodwill and Intangible Assets

Goodwill

The following table presents details of our goodwill during the six months ended January 31, 2014 (in thousands):



	Gross Carrying Amount		Accumulated Impairment Loss		Net Carrying Amount
Balance as of July 31, 2013	$	—	$	—	$	—
Goodwill acquired	10,094		—		10,094
Balance as of January 31, 2014	$	10,094	$	—	$	10,094

Purchased Intangible Assets

The following tables present details of our purchased intangible assets as of January 31, 2014 and July 31, 2013 (in thousands):



	January 31, 2014
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Acquired intellectual property	$	6,546	$	(548	)	$	5,998
In-process research and development held for defensive purposes	1,900		(53		)	1,847
Other	300		(12		)	288
Total	$	8,746	$	(613	)	$	8,133



	July 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Acquired intellectual property	$	1,546	$	(188	)	$	1,358

Amortization expense was $270,000 and $425,000 for the three and six months ended January 31, 2014, respectively, and $13,000 and $26,000 for the three and six months ended January 31, 2013, respectively.

The following table summarizes our estimated future amortization expense of intangible assets by type as of January 31, 2014 (in thousands):



	Fiscal Years Ending July 31,
	Remaining 2014		2015		2016		2017		2018		2019 and Thereafter
Acquired intellectual property	$	410	$	761	$	704	$	611	$	484	$	3,028
In-process research and development held for defensive purposes	317		633		633		264		—		—
Other	75		150		63		—		—		—
Total future amortization expense	$	802	$	1,544	$	1,400	$	875	$	484	$	3,028

Commitments and Contingencies

6 Months Ended

Jan. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Leases

We lease our facilities under various non-cancelable operating leases, which expire through the year ending July 31, 2023.

The following table presents details of the aggregate future non-cancelable minimum rental payments on our operating leases as of January 31, 2014 (in thousands):



	Amount
Fiscal years ending July 31:
Remaining 2014	$	5,575
2015	13,599
2016	13,824
2017	12,858
2018	11,693
2019 and thereafter	52,300
Committed gross lease payments	109,849
Less: proceeds from sublease rental	10,700
Net operating lease obligation	$	99,149

Contract Manufacturer Commitments

Our independent contract manufacturer procures components and assembles our products based on our forecasts. These forecasts are based on estimates of future demand for our products, which are in turn based on historical trends and an analysis from our sales and product marketing organizations, adjusted for overall market conditions. In order to reduce manufacturing lead times and plan for adequate supply, we may issue forecasts and orders for components and products that are non-cancelable. Obligations under contracts that we can cancel without a significant penalty are not included. As of January 31, 2014, we had $32,150,000 of open orders.

Litigation

In December 2011, Juniper Networks, Inc. filed a complaint against us in the United States District Court for the District of Delaware alleging patent infringement. The complaint seeks preliminary and permanent injunctions against infringement, treble damages, and attorney’s fees. On February 9, 2012, we filed a response to the complaint, which denied all claims and asserted that the claimant’s patents were invalid. On February 28, 2012, Juniper filed a motion to strike our defense of invalidity based on the legal doctrine of “assignor estoppel.” On March 23, 2012, we filed a brief in opposition to that motion. Juniper filed a brief in response on April 2, 2012. On August 2, 2012, the District Court issued an order granting Juniper’s motion as to one of the patents in suit (the ’634 patent) but denying Juniper’s motion as to the five other patents in suit. On September 4, 2012, Juniper filed a motion to amend its complaint to allege that our appliances infringe two additional U.S. patents but also to withdraw its allegations as to a previously-asserted patent. This amended complaint was officially filed on September 25, 2012, pursuant to a stipulation between the parties. Juniper now alleges that our appliances infringe seven of its patents. On September 13, 2012, we filed with the U.S. Patent and Trademark Office requests for inter partes reexamination of five of the six patents asserted by Juniper in its original complaint. We did not file a request for reexamination on the withdrawn patent. On October 12, 2012, we filed an answer to Juniper’s amended complaint, which denied that we infringed Juniper’s patents and asserted that Juniper’s patents were invalid. On October 19 and December 3, 2012, the U.S. Patent and Trademark Office granted our requests for reexamination for three patents, rejecting a number of the claims asserted in the litigation, and on November 15 and 26, 2012, the U.S. Patent and Trademark Office denied our requests for reexamination as to two other patents. We have the opportunity to seek review of these denials within the U.S. Patent and Trademark Office. Each party served its opening expert report on April 12, 2013, and rebuttal expert report on May 13, 2013, and supplemental expert reports on June 11, 2013. The parties filed opening and responsive briefs regarding claim construction, filed their opening summary judgment briefs on August 20, 2013, and filed opposition briefs and additional summary judgment motions on September 12, 2013. On June 20, 2013 and July 23, 2013, we filed with the U.S. Patent and Trademark Office petitions for inter partes review for two other patents asserted by Juniper in the litigation. The Patent and Trademark Office granted both of those petitions and instituted trials to take place in August 2014 and September 2014. A hearing to resolve claim construction issues, as well as motions for summary judgment, was heard on November 15, 2013.

The Court issued an order on February 6, 2014, in which the Court construed several disputed claim limitations, granted Juniper’s motion for summary judgment of assignor estoppel, denied Juniper’s motion for summary judgment of infringement, and granted in part and denied in part our motion for summary judgment of non-infringement. A trial began on February 24, 2014, and we are vigorously defending ourselves from such claims. At this stage in the litigation we do not believe that a loss is probable and we are unable to estimate a possible loss or range of possible loss.

On September 30, 2013, we filed a lawsuit against Juniper in the United States District Court for the Northern District of California. The lawsuit alleges that Juniper’s products infringe three of our U.S. patents, and seeks monetary damages and a permanent injunction. On November 21, 2013, Juniper filed an answer and counterclaims in a separate action pending in the United States District Court for the Northern District of California. In its counterclaims Juniper seeks a declaration that the asserted patents owned by us are not infringed and are invalid. Juniper’s counterclaims also assert that our products infringe three additional Juniper patents.

In addition to the above matter, we are subject to legal proceedings, claims, and litigation arising in the ordinary course of business, including intellectual property litigation. Such matters are subject to many uncertainties and outcomes are not predictable with assurance. We accrue for contingencies when we believe that a loss is probable and that we can reasonably estimate the amount of any such loss. We have made an assessment of the probability of incurring any such losses and whether or not those losses are estimable.

To the extent there is a reasonable possibility that a loss exceeding amounts already recognized may be incurred and the amount of such additional loss would be material, we will either disclose the estimated additional loss or state that such an estimate cannot be made.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 20
-Section 50
-Paragraph 1
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-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Mutual Covenant Not to Sue and Release Agreement (Notes)	6 Months Ended
	Jan. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Mutual Covenant Not to Sue and Release Agreement	Mutual Covenant Not to Sue and Release Agreement On January 27, 2014, we executed a Mutual Covenant Not to Sue and Release agreement, thereby extending an existing covenant for six more years. We evaluated the transaction as a multiple-element arrangement and allocated the one-time payment that we made in the amount of $20,000,000 to each identifiable element using its relative fair value. Based on our estimates of fair value, we determined that the primary benefit of the arrangement is avoided litigation cost and the release of any potential past claims, with no material value attributable to future use or benefit. Accordingly, we recorded a $20,000,000 expense in general and administrative expense during the three months ended January 31, 2014.

Equity Award Plans

6 Months Ended

Jan. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Equity Award Plans

Stock Option Activities

A summary of the activity under our stock plans and changes during the reporting period and a summary of information related to options exercisable, vested, and expected to vest are presented below (in thousands, except per share amounts):



	Options Outstanding
	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Balance—July 31, 2013	10,033		$	11.74	7.8	$	373,228
Options granted	—		—
Options forfeited	(414	)	14.94
Options exercised	(1,812	)	7.78
Balance—January 31, 2014	7,807		12.49		7.5	$	366,617
Options vested and expected to vest—January 31, 2014	7,586		$	12.38	7.4	$	357,073
Options exercisable—January 31, 2014	4,335		$	9.73	7.2	$	215,536

Restricted Stock Units (RSUs) Activities

A summary of the activity under our stock plans and changes during the reporting period and a summary of information related to RSUs vested and expected to vest are presented below (in thousands, except per share amounts):



	RSUs Outstanding
	Number of Shares		Weighted- Average Grant-Date Fair Value Per Share		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Balance—July 31, 2013	2,241		$	54.36	1.5	$	109,675
RSUs granted	3,612		54.72
RSUs vested	(447	)	56.42
RSUs forfeited	(205	)	54.57
Balance—January 31, 2014	5,201		$	54.42	1.6	$	309,199
RSUs vested and expected to vest—January 31, 2014	4,640		$	54.44	1.6	$	275,848

Shares Available for Grant

The following table presents the stock activity and the total number of shares available for grant as of January 31, 2014 (in thousands):



	Number of Shares
Balance—July 31, 2013	8,932
Authorized	3,223
RSUs granted	(3,612	)
Repurchased	21
Options forfeited	414
RSUs forfeited	205
Balance—January 31, 2014	9,183

Employee Stock Purchase Plan (ESPP)

Compensation expense recognized in connection with the 2012 Employee Stock Purchase Plan was $1,073,000 and $2,075,000 for the three and six months ended January 31, 2014, respectively, and $1,467,000 and $2,811,000 for the three and six months ended January 31, 2013, respectively.

Share-Based Compensation

The following table summarizes the assumptions used to value grants related to the 2012 ESPP in each period:



	Three Months Ended January 31, 2014	Six Months Ended January 31, 2014
Risk-free interest rate	N/A	—%
Expected term (years)	N/A	< 1 year
Volatility	N/A	39%
Dividend yield	N/A	—%

The following table summarizes share-based compensation included in costs and expenses (in thousands):



	Three Months Ended January 31,				Six Months Ended January 31,
	2014		2013		2014		2013
Cost of revenue	$	2,405	$	825	$	4,155	$	1,435
Research and development	5,807		1,973		9,159		3,663
Sales and marketing	9,745		3,935		16,678		8,233
General and administrative	6,427		2,021		8,803		3,765
Total	$	24,384	$	8,754	$	38,795	$	17,096

At January 31, 2014, total compensation cost related to unvested share-based awards granted to employees under our stock plans but not yet recognized was $266,970,000, net of estimated forfeitures. This cost is expected to be amortized on a straight-line basis over a weighted-average period of three years. Future grants will increase the amount of compensation expense to be recorded in these periods.

During the three months ended January 31, 2014, we accelerated the vesting of certain share-based awards and as a result, in the three and six months ended January 31, 2014, we recorded compensation expense within general and administrative expense of $3,384,000.

During the three months ended October 31, 2012, we modified the terms of certain share-based awards and as a result, in the three and six months ended January 31, 2013, we recorded compensation expense within sales and marketing expense of $461,000 and $1,861,000, respectively.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Income Taxes	6 Months Ended
Income Taxes	Jan. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our provision for income taxes for the three and six months ended January 31, 2014 reflects an effective tax rate of negative 7% and negative 9%, respectively. Our effective tax rates for these periods were negative due to the fact that we recorded a provision for income taxes on year-to-date losses. The key components of our income tax provision, and the related effective tax rate, consist of foreign tax losses which derive no benefit, non-deductible share-based compensation and foreign withholding taxes. As compared to the same periods last year, our negative effective tax rate decreased due to an increase in our loss before income taxes. Our provision for income taxes for the three and six months ended January 31, 2013 reflects an effective tax rate of negative 24% and negative 16%, respectively. Our effective tax rates for these periods were negative due to the fact that we recorded a provision for income taxes on year-to-date losses. The key components of our income tax provision, and the related effective tax rate, consist of foreign tax losses which derive no benefit, non-deductible share-based compensation and foreign withholding taxes.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Net Income (Loss) Per Share

6 Months Ended

Jan. 31, 2014

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Net Income (Loss) Per Share

We compute net income (loss) per share of common stock using the two-class method required for participating securities. We consider shares issued upon the early exercise of options subject to repurchase and unvested restricted shares to be participating securities because holders of such shares have non-forfeitable dividend rights in the event of our declaration of a dividend for common shares. In accordance with the two-class method, earnings allocated to these participating securities, which include participation rights in undistributed earnings with common stock, are subtracted from net income to determine net income (loss) attributable to common stockholders.

Basic net income (loss) per common share is computed by dividing net income (loss) attributable to common stockholders by basic weighted-average shares outstanding during the period. All participating securities are excluded from basic weighted-average shares outstanding. In computing diluted net income (loss) attributable to common stockholders, undistributed earnings are re-allocated to reflect the potential impact of dilutive securities. Diluted net income (loss) per share attributable to common stockholders is computed by dividing net income (loss) attributable to common stockholders by diluted weighted-average shares outstanding, including potentially dilutive securities.

The following table presents the computation of basic and diluted net loss per share of common stock (in thousands, except per share data):



	Three Months Ended January 31,						Six Months Ended January 31,
	2014			2013			2014			2013
Net loss attributable to common stockholders	$	(39,946	)	$	(2,613	)	$	(47,807	)	$	(6,128	)
Weighted-average shares used to compute net loss per share, basic and diluted	72,854			67,651			72,260			67,225
Net loss per share attributable to common stockholders, basic and diluted	$	(0.55	)	$	(0.04	)	$	(0.66	)	$	(0.09	)

The following outstanding options, RSUs, and ESPP shares were excluded from the computation of diluted net loss per common share applicable to common stockholders for the periods presented as their effects would have been antidilutive (in thousands):



	January 31, 2014	January 31, 2013
Options to purchase common stock	7,807	12,797
RSUs	5,201	1,580
ESPP shares	132	—

Description of Business and Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jan. 31, 2014

Accounting Policies [Abstract]

Basis of Presentation

The accompanying condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, consistent in all material respects with those applied in our Annual Report on Form 10-K for the fiscal year ended July 31, 2013. The condensed consolidated financial statements include all adjustments necessary for a fair presentation of our quarterly results. All adjustments are of a normal recurring nature. We have made estimates and judgments affecting the amounts reported in our condensed consolidated financial statements and the accompanying notes. The actual results that we experience may differ materially from our estimates.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Business Combinations

We include the results of operations of the businesses that we acquire as of the respective dates of acquisition. We allocate the fair value of the purchase price of our acquisitions to the tangible assets acquired, liabilities assumed, and intangible assets acquired, based on their estimated fair values. The excess of the purchase price over the fair values of these identifiable assets and liabilities is recorded as goodwill. Additional information existing as of the acquisition date but unknown to us may become known during the remainder of the measurement period, not to exceed 12 months from the acquisition date, which may result in changes to the amounts and allocations recorded.

Goodwill, Intangible Assets and Impairment of Long-lived Assets

Goodwill, Intangible Assets, and Impairment of Long-Lived Assets

Goodwill is evaluated for impairment on an annual basis in the fourth quarter of our fiscal year, and whenever events or changes in circumstances indicate the carrying value of goodwill may not be recoverable. We have elected to first assess qualitative factors to determine whether it is more likely than not that the fair value of our single reporting unit is less than its carrying amount. If we determine that it is more likely than not that the fair value of our single reporting unit is less than its carrying amount, then the two-step goodwill impairment test will be performed. The first step, identifying a potential impairment, compares the fair value of our single reporting unit with its carrying amount. If the carrying amount exceeds its fair value, the second step will be performed; otherwise, no further step is required. The second step, measuring the impairment loss, compares the implied fair value of the goodwill with the carrying amount of the goodwill. Any excess of the goodwill carrying amount over the implied fair value is recognized as an impairment loss.

We evaluate events and changes in circumstances that could indicate carrying amounts of long-lived assets, including property and equipment and purchased intangible assets subject to amortization, may not be recoverable. When such events or changes in circumstances occur, we assess the recoverability of long-lived assets by determining whether or not the carrying amount of such assets will be recovered through undiscounted expected future cash flows. If the total of the future undiscounted cash flows is less than the carrying amount of an asset, we record an impairment loss for the amount by which the carrying amount of the asset exceeds the fair value of the asset.

Recent Accounting Pronouncements

In July 2013, the FASB issued ASU No. 2013-11, Income Taxes (Topic 740)-Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The standard requires us to present an unrecognized tax benefit as a reduction of a deferred tax asset for a net operating loss (NOL) carryforward or other tax credit carryforward when settlement in this manner is available under applicable tax law. The guidance is effective for us in the first quarter of fiscal 2015. We do not believe the adoption of this guidance will have a material impact on our condensed consolidated financial statements.

In February 2013, the FASB issued Accounting Standards Update No. 2013-02, Comprehensive Income (Topic 220)-Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. The standard requires entities to present (either on the face of the income statement or in the notes) the effects on the line items of the income statement for amounts reclassified out of accumulated other comprehensive income. The guidance was effective for us in the first quarter of fiscal 2014. Our adoption of this guidance did not impact our financial statements as the guidance is related to disclosure only and we did not have significant reclassifications out of accumulated other comprehensive income.

Fair Value Measurements


•	Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.


•	Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments.


•	Level 3—Inputs are unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation.

- Definition

Disclosure of accounting policy for completed business combinations (purchase method, acquisition method or combination of entities under common control). This accounting policy may include a general discussion of the purchase method or acquisition method of accounting (including for example, the treatment accorded contingent consideration, the identification of assets and liabilities, the purchase price allocation process, how the fair values of acquired assets and liabilities are determined) and the entity's specific application thereof. An entity that acquires another entity in a leveraged buyout transaction generally discloses the accounting policy followed by the acquiring entity in determining the basis used to value its interest in the acquired entity, and the rationale for that accounting policy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2303973

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
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-Subparagraph a, b, c, d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 88-16
-Section SEC Observer Comments
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 141
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2197480

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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.3A-02)
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 5, 6, 16-19
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 96-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-Subparagraph d
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Principles Board Opinion (APB)
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-Subparagraph a(2)
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Research Bulletin (ARB)
-Number 51
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph k
-Article 1

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
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Reference 18: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
-Number 210
-Section 02, 03
-Article 3A

Reference 19: http://www.xbrl.org/2003/role/presentationRef
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-Name FASB Interpretation (FIN)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Fair Value Measurements (Tables)

6 Months Ended

Jan. 31, 2014

Fair Value Disclosures [Abstract]

Schedule of fair value of financial assets and liabilities

The following table presents the fair value of our financial assets and liabilities using the above input categories (in thousands):



	January 31, 2014								July 31, 2013
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents:
Certificates of deposit	$	—	$	—	$	—	$	—	$	1,822	$	—	$	—	$	1,822
U.S. government and agency securities	—		38,000		—		38,000		—		46,700		—		46,700
Money market funds	—		—		—		—		131,845		—		—		131,845
Total cash equivalents	—		38,000		—		38,000		133,667		46,700		—		180,367
Short-term investments:
Corporate debt securities	—		27,555		—		27,555		—		32,834		—		32,834
U.S. government and agency securities	—		148,790		—		148,790		—		76,173		—		76,173
Total short-term investments	—		176,345		—		176,345		—		109,007		—		109,007
Long-term investments:
Certificates of deposit	—		2,999		—		2,999		—		—		—		—
Corporate debt securities	—		18,879		—		18,879		—		12,317		—		12,317
U.S. government and agency securities	—		41,227		—		41,227		—		4,997		—		4,997
Total long-term investments	—		63,105		—		63,105		—		17,314		—		17,314
Other assets:
Restricted cash	1,220		—		—		1,220		1,221		—		—		1,221
Total other assets	1,220		—		—		1,220		1,221		—		—		1,221
Total assets measured at fair value	$	1,220	$	277,450	$	—	$	278,670	$	134,888	$	173,021	$	—	$	307,909

- Definition

Tabular disclosure related to assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a recurring and/or nonrecurring basis in periods after initial recognition. Disclosures include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3) as well as transfers between levels 1 and 2.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19279-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a,b,bb)
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2C
-URI http://asc.fasb.org/extlink&oid=7578670&loc=SL7498348-110258

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 33
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 6
-Footnote 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Investments (Tables)

6 Months Ended

Jan. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule of available-for-sale investments

The following tables summarize our unrealized gains and losses and fair value of investments as of January 31, 2014 and July 31, 2013 (in thousands):



	January 31, 2014
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Certificates of deposit	$	3,000	$	—	$	(1	)	$	2,999
Corporate debt securities	46,419		23		(8		)	46,434
U.S. government and agency securities	227,988		35		(6		)	228,017
Total	$	277,407	$	58	$	(15	)	$	277,450



	July 31, 2013
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Certificates of deposit	$	1,822	$	—	$	—		$	1,822
Corporate debt securities	45,173		12		(34		)	45,151
U.S. government and agency securities	127,864		8		(2		)	127,870
Money market funds	131,845		—		—			131,845
Total	$	306,704	$	20	$	(36	)	$	306,688

Schedule of available-for-sale investments in unrealized loss position

The following tables present our investments that were in an unrealized loss position as of January 31, 2014 and July 31, 2013 (in thousands):



	January 31, 2014
	Less Than 12 Months					12 Months or Greater				Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Certificates of deposit	$	2,999	$	(1	)	$	—	$	—	$	2,999	$	(1	)
Corporate debt securities	16,834		(8		)	—		—		16,834		(8		)
U.S. government and agency securities	29,645		(6		)	—		—		29,645		(6		)
Total	$	49,478	$	(15	)	$	—	$	—	$	49,478	$	(15	)



	July 31, 2013
	Less Than 12 Months					12 Months or Greater				Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Corporate debt securities	$	31,429	$	(34	)	$	—	$	—	$	31,429	$	(34	)
U.S. government and agency securities	15,926		(2		)	—		—		15,926		(2		)
Total	$	47,355	$	(36	)	$	—	$	—	$	47,355	$	(36	)

Contractual maturities of available-for-sale investments

The following table summarizes the amortized cost and fair value of our investments as of January 31, 2014, by contractual years-to-maturity (in thousands):



	Amortized Cost		Fair Value
Due within one year	$	214,320	$	214,345
Due within one to two years	63,087		63,105
Total	$	277,407	$	277,450

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27198-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 19, 20, 21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 17
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-1
-Paragraph 21
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Acquisitions (Tables)

6 Months Ended

Jan. 31, 2014

Business Combinations [Abstract]

Schedule of Purchase Price Allocation

The following table summarizes our preliminary allocation of the purchase price based on the fair value of assets acquired and liabilities assumed (in thousands):



	Amount
Goodwill	$	10,094
Identified intangible assets	2,200
Net liabilities assumed	(1,949		)
Total	$	10,345

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination

The following table presents details of the identified intangible assets acquired (in thousands, except years):



	Fair Value		Estimated Useful Life
In-process research and development held for defensive purposes	$	1,900	3 years
Other	300		2 years
Total	$	2,200

Goodwill and Intangible Assets (Tables)

6 Months Ended

Jan. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table presents details of our goodwill during the six months ended January 31, 2014 (in thousands):



	Gross Carrying Amount		Accumulated Impairment Loss		Net Carrying Amount
Balance as of July 31, 2013	$	—	$	—	$	—
Goodwill acquired	10,094		—		10,094
Balance as of January 31, 2014	$	10,094	$	—	$	10,094

Finite-Lived Intangible Assets and Related Amortization

The following tables present details of our purchased intangible assets as of January 31, 2014 and July 31, 2013 (in thousands):



	January 31, 2014
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Acquired intellectual property	$	6,546	$	(548	)	$	5,998
In-process research and development held for defensive purposes	1,900		(53		)	1,847
Other	300		(12		)	288
Total	$	8,746	$	(613	)	$	8,133



	July 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Acquired intellectual property	$	1,546	$	(188	)	$	1,358

Finite-Lived Intangible Assets, Future Amortization Expense

The following table summarizes our estimated future amortization expense of intangible assets by type as of January 31, 2014 (in thousands):



	Fiscal Years Ending July 31,
	Remaining 2014		2015		2016		2017		2018		2019 and Thereafter
Acquired intellectual property	$	410	$	761	$	704	$	611	$	484	$	3,028
In-process research and development held for defensive purposes	317		633		633		264		—		—
Other	75		150		63		—		—		—
Total future amortization expense	$	802	$	1,544	$	1,400	$	875	$	484	$	3,028

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References + Details

Commitments and Contingencies (Tables)

6 Months Ended

Jan. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

The following table presents details of the aggregate future non-cancelable minimum rental payments on our operating leases as of January 31, 2014 (in thousands):



	Amount
Fiscal years ending July 31:
Remaining 2014	$	5,575
2015	13,599
2016	13,824
2017	12,858
2018	11,693
2019 and thereafter	52,300
Committed gross lease payments	109,849
Less: proceeds from sublease rental	10,700
Net operating lease obligation	$	99,149

Equity Award Plans (Tables)

6 Months Ended

Jan. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Stock Options Activity



	Options Outstanding
	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Balance—July 31, 2013	10,033		$	11.74	7.8	$	373,228
Options granted	—		—
Options forfeited	(414	)	14.94
Options exercised	(1,812	)	7.78
Balance—January 31, 2014	7,807		12.49		7.5	$	366,617
Options vested and expected to vest—January 31, 2014	7,586		$	12.38	7.4	$	357,073
Options exercisable—January 31, 2014	4,335		$	9.73	7.2	$	215,536

Schedule of Restricted Stock Units Award Activity



	RSUs Outstanding
	Number of Shares		Weighted- Average Grant-Date Fair Value Per Share		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Balance—July 31, 2013	2,241		$	54.36	1.5	$	109,675
RSUs granted	3,612		54.72
RSUs vested	(447	)	56.42
RSUs forfeited	(205	)	54.57
Balance—January 31, 2014	5,201		$	54.42	1.6	$	309,199
RSUs vested and expected to vest—January 31, 2014	4,640		$	54.44	1.6	$	275,848

Shares Available For Grant

The following table presents the stock activity and the total number of shares available for grant as of January 31, 2014 (in thousands):



	Number of Shares
Balance—July 31, 2013	8,932
Authorized	3,223
RSUs granted	(3,612	)
Repurchased	21
Options forfeited	414
RSUs forfeited	205
Balance—January 31, 2014	9,183

Summary of Employee Stock Purchase Plan, Valuation Assumptions

The following table summarizes the assumptions used to value grants related to the 2012 ESPP in each period:



	Three Months Ended January 31, 2014	Six Months Ended January 31, 2014
Risk-free interest rate	N/A	—%
Expected term (years)	N/A	< 1 year
Volatility	N/A	39%
Dividend yield	N/A	—%

Schedule of Allocation of Share Based Compensation Expense

The following table summarizes share-based compensation included in costs and expenses (in thousands):



	Three Months Ended January 31,				Six Months Ended January 31,
	2014		2013		2014		2013
Cost of revenue	$	2,405	$	825	$	4,155	$	1,435
Research and development	5,807		1,973		9,159		3,663
Sales and marketing	9,745		3,935		16,678		8,233
General and administrative	6,427		2,021		8,803		3,765
Total	$	24,384	$	8,754	$	38,795	$	17,096

- Definition

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ References + Details

Net Income (Loss) Per Share (Tables)

6 Months Ended

Jan. 31, 2014

Earnings Per Share [Abstract]

Computation of basic and diluted net income (loss) per share of common stock

The following table presents the computation of basic and diluted net loss per share of common stock (in thousands, except per share data):



	Three Months Ended January 31,						Six Months Ended January 31,
	2014			2013			2014			2013
Net loss attributable to common stockholders	$	(39,946	)	$	(2,613	)	$	(47,807	)	$	(6,128	)
Weighted-average shares used to compute net loss per share, basic and diluted	72,854			67,651			72,260			67,225
Net loss per share attributable to common stockholders, basic and diluted	$	(0.55	)	$	(0.04	)	$	(0.66	)	$	(0.09	)

Schedule of antidilutive securities excluded from computation of net income (loss) per share



	January 31, 2014	January 31, 2013
Options to purchase common stock	7,807	12,797
RSUs	5,201	1,580
ESPP shares	132	—

Fair Value Measurements (Details) - USD ($) $ in Thousands	Jan. 31, 2014	Jul. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	$ 38,000	$ 180,367
Short-term investments	176,345	109,007
Long-term investments	63,105	17,314
Other assets	1,220	1,221
Total assets measured at fair value	278,670	307,909
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	133,667
Short-term investments	0	0
Long-term investments	0	0
Other assets	1,220	1,221
Total assets measured at fair value	1,220	134,888
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	38,000	46,700
Short-term investments	176,345	109,007
Long-term investments	63,105	17,314
Other assets	0	0
Total assets measured at fair value	277,450	173,021
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Short-term investments	0	0
Long-term investments	0	0
Other assets	0	0
Total assets measured at fair value	0	0
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	1,822
Long-term investments	2,999	0
Other assets	1,220	1,221
Certificates of deposit \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	1,822
Long-term investments	0	0
Other assets	1,220	1,221
Certificates of deposit \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Long-term investments	2,999	0
Other assets	0	0
Certificates of deposit \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Long-term investments	0	0
Other assets	0	0
U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	38,000	46,700
Short-term investments	148,790	76,173
Long-term investments	41,227	4,997
U.S. government and agency securities \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Short-term investments	0	0
Long-term investments	0	0
U.S. government and agency securities \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	38,000	46,700
Short-term investments	148,790	76,173
Long-term investments	41,227	4,997
U.S. government and agency securities \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Short-term investments	0	0
Long-term investments	0	0
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	131,845
Money market funds \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	131,845
Money market funds \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Money market funds \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	27,555	32,834
Long-term investments	18,879	12,317
Corporate debt securities \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Long-term investments	0	0
Corporate debt securities \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	27,555	32,834
Long-term investments	18,879	12,317
Corporate debt securities \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Long-term investments	$ 0	$ 0

Investments (Available-for-Sale Investments) (Details) - USD ($) $ in Thousands	Jan. 31, 2014	Jul. 31, 2013
Schedule of Available-for-sale Securities
Amortized Cost	$ 277,407	$ 306,704
Unrealized Gains	58	20
Unrealized Losses	(15)	(36)
Estimated Fair Value	277,450	306,688
Certificates of deposit
Schedule of Available-for-sale Securities
Amortized Cost	3,000	1,822
Unrealized Gains	0	0
Unrealized Losses	(1)	0
Estimated Fair Value	2,999	1,822
Corporate debt securities
Schedule of Available-for-sale Securities
Amortized Cost	46,419	45,173
Unrealized Gains	23	12
Unrealized Losses	(8)	(34)
Estimated Fair Value	46,434	45,151
U.S. government and agency securities
Schedule of Available-for-sale Securities
Amortized Cost	227,988	127,864
Unrealized Gains	35	8
Unrealized Losses	(6)	(2)
Estimated Fair Value	$ 228,017	127,870
Money market funds
Schedule of Available-for-sale Securities
Amortized Cost		131,845
Unrealized Gains		0
Unrealized Losses		0
Estimated Fair Value		$ 131,845

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 12
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15C
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 13
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15E
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Investments (Available-for-Sale Investments in Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Jan. 31, 2014	Jul. 31, 2013
Schedule of Available-for-sale Securities
Less than 12 Months, Fair Value	$ 49,478	$ 47,355
12 Months or Greater, Fair Value	0	0
Total, Unrealized Loss Position, Fair Value	49,478	47,355
Less than 12 Months, Unrealized Loss	(15)	(36)
12 Months or Greater, Unrealized Loss	0	0
Total, Unrealized Loss	(15)	(36)
Certificates of deposit
Schedule of Available-for-sale Securities
Less than 12 Months, Fair Value	2,999
12 Months or Greater, Fair Value	0
Total, Unrealized Loss Position, Fair Value	2,999
Less than 12 Months, Unrealized Loss	(1)
12 Months or Greater, Unrealized Loss	0
Total, Unrealized Loss	(1)
Corporate debt securities
Schedule of Available-for-sale Securities
Less than 12 Months, Fair Value	16,834	31,429
12 Months or Greater, Fair Value	0	0
Total, Unrealized Loss Position, Fair Value	16,834	31,429
Less than 12 Months, Unrealized Loss	(8)	(34)
12 Months or Greater, Unrealized Loss	0	0
Total, Unrealized Loss	(8)	(34)
U.S. government and agency securities
Schedule of Available-for-sale Securities
Less than 12 Months, Fair Value	29,645	15,926
12 Months or Greater, Fair Value	0	0
Total, Unrealized Loss Position, Fair Value	29,645	15,926
Less than 12 Months, Unrealized Loss	(6)	(2)
12 Months or Greater, Unrealized Loss	0	0
Total, Unrealized Loss	$ (6)	$ (2)

Investments (Available-for-Sale Investments, Contractual Maturities) (Details) $ in Thousands	Jan. 31, 2014 USD ($)
Amortized Cost
Due within one year	$ 214,320
Due within one to two years	63,087
Total	277,407
Fair Value
Due within one year	214,345
Due within one to two years	63,105
Total	$ 277,450

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References + Details

Acquisitions (Details) - USD ($)		3 Months Ended
Acquisitions (Details) - USD ($)	Dec. 26, 2013	Oct. 31, 2013
Business Acquisition [Line Items]
Total cash consideration	$ 10,345,000
Restricted cash for Morta's indemnification obligations	$ 2,500,000
Patents
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired		$ 5,000,000
Estimated Weighted Average Useful Life (in years)		13 years

- Definition

This element represents the acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer.

+ References + Details

Acquisitions Purchase price allocation (Details) $ in Thousands	Dec. 26, 2013 USD ($)
Business Acquisition [Line Items]
Goodwill	$ 10,094
Identified intangible assets	2,200
Net liabilities assumed	(1,949)
Total	$ 10,345

Acquisitions Schedule of finite-lived intangible assets acquired as part of business combination (Details) $ in Thousands	Dec. 26, 2013 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 2,200
In-process research and development held for defensive purposes
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 1,900
Estimated Weighted Average Useful Life (in years)	3 years
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 300
Estimated Weighted Average Useful Life (in years)	2 years

Goodwill and Intangible Assets Goodwill roll-forward (Details) $ in Thousands	6 Months Ended
	Jan. 31, 2014 USD ($)
Goodwill [Line Items]
Gross carrying amount, beginning	$ 0
Goodwill acquired	10,094
Gross carrying amount, ending	10,094
Goodwill, accumulated impairment loss, beginning	0
Goodwill, Impairment Loss	0
Goodwill, accumulated impairment loss, ending	0
Goodwill, beginning	0
Goodwill, net, increase (decrease)	10,094
Goodwill, ending	$ 10,094

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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-Name Statement of Financial Accounting Standard (FAS)
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2014	Jul. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 8,746
Accumulated Amortization	(613)
Net Carrying Value	8,133
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,546	$ 1,546
Accumulated Amortization	(548)	(188)
Net Carrying Value	5,998	$ 1,358
In-process research and development held for defensive purposes
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,900
Accumulated Amortization	(53)
Net Carrying Value	1,847
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	300
Accumulated Amortization	(12)
Net Carrying Value	$ 288

Goodwill and Intangible Assets Amortization expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 270	$ 13	$ 425	$ 26

Goodwill and Intangible Assets Future Amortization Expense (Details) $ in Thousands	Jan. 31, 2014 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining 2014	$ 802
2015	1,544
2016	1,400
2017	875
2018	484
2019 and thereafter	3,028
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining 2014	410
2015	761
2016	704
2017	611
2018	484
2019 and thereafter	3,028
In-process research and development held for defensive purposes
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining 2014	317
2015	633
2016	633
2017	264
2018	0
2019 and thereafter	0
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining 2014	75
2015	150
2016	63
2017	0
2018	0
2019 and thereafter	$ 0

Commitments and Contingencies Lease commitment schedule (Details) $ in Thousands	Jan. 31, 2014 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remaining 2014	$ 5,575
2015	13,599
2016	13,824
2017	12,858
2018	11,693
2019 and thereafter	52,300
Committed gross lease payments	109,849
Less: proceeds from sublease rental	(10,700)
Net operating lease obligation	$ 99,149

Commitments and Contingencies (Textuals) (Details) $ in Thousands	Jan. 31, 2014 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Contractual Obligation	$ 32,150

Mutual Covenant Not to Sue and Release Agreement (Details) - USD ($)		3 Months Ended
	Jan. 27, 2014	Jan. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Payment related to Mutual Covenant Not to Sue and Release agreement	$ 20,000,000
General and administrative expense related to Mutual Covenant Not to Sue and Release agreement		$ 20,000,000.0

Equity Award Plans (Stock Options Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jan. 31, 2014	Jul. 31, 2013
Options, Outstanding Roll Forward
Balance, beginning (in shares)	10,033
Options granted (in shares)	0
Options forfeited (in shares)	(414)
Options exercised (in shares)	(1,812)
Balance, ending (in shares)	7,807	10,033
Options, Outstanding, Weighted Average Exercise Price Roll Forward
Balance, beginning (in usd per share)	$ 11.74
Options granted (in usd per share)	0.00
Options forfeited (in usd per share)	14.94
Options exercised (in usd per share)	7.78
Balance, ending (in usd per share)	$ 12.49	$ 11.74
Options, Additional Disclosures
Weighted-Average Remaining Contractual Life (in years)	7 years 6 months	7 years 9 months
Aggregate Intrinsic Value	$ 366,617	$ 373,228
Options vested and expected to vest (in shares)	7,586
Options vested and expected to vest, Weighted-Average Exercise Price (in usd per share)	$ 12.38
Options vested and expected to vest, Weighted-Average Remaining Contractual Term (in years)	7 years 5 months
Options vested and expected to vest, Aggregate Intrinsic Value	$ 357,073
Options exercisable (in shares)	4,335
Options exercisable, Weighted-Average Exercise Price (in usd per share)	$ 9.73
Options exercisable, Weighted-Average Remaining Contractual Term (in years)	7 years 2 months
Optios exercisable, Aggregate Intrinsic Value	$ 215,536

Equity Award Plans (Restricted Stock Units Award Activity) (Details) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jan. 31, 2014	Jul. 31, 2013
RSUs, Outstanding Roll Forward
Balance, beginning (in shares)	2,241
RSUs granted (in shares)	3,612
RSUs vested (in shares)	(447)
RSUs forfeited (in shares)	(205)
Balance, ending (in shares)	5,201	2,241
RSUs, Outstanding, Weighted Average Grant-Date Fair Value Per Share Roll Forward
Balance, beginning (in usd per share)	$ 54.36
RSUs granted (in usd per share)	54.72
RSUs vested (in usd per share)	56.42
RSUs forfeited (in usd per share)	54.57
Balance, ending (in usd per share)	$ 54.42	$ 54.36
RSUs, Additional Disclosures
Weighted-Average Remaining Contractual Term (in years)	1 year 7 months	1 year 6 months
Aggregate Intrinsic Value	$ 309,199	$ 109,675
RSUs vested and expected to vest (in shares)	4,640
RSUs vested and expected to vest, Weighted-Average Grant-Date Fair Value (in usd per share)	$ 54.44
RSUs vested and expected to vest, Weighted-Average Remaining Contractual Term (in years)	1 year 7 months
RSUs vested and expected to vest, Aggregate Intrinsic Value	$ 275,848

Equity Award Plans Shares Available for Grant (Details) shares in Thousands	6 Months Ended
	Jan. 31, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award
Shares Available for Grant, Beginning (in shares)	8,932
Additional Shares Authorized (in shares)	3,223
Stock Repurchased (in shares)	21
Options forfeited (in shares)	414
Shares Available for Grant, Ending (in shares)	9,183
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
RSUs granted (in shares)	(3,612)
RSUs forfeited (in shares)	205

Equity Award Plans Employee Stock Purchase Plan, Valuation Assumptions (Details) - Employee Stock Purchase Plan (ESPP)	6 Months Ended
	Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award
Risk-free interest rate	0.00%
Expected term (in years)	6 months
Volatility	39.00%
Dividend yield	0.00%

Equity Award Plans (Allocation of Share Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	$ 24,384	$ 8,754	$ 38,795	$ 17,096
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	2,405	825	4,155	1,435
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	5,807	1,973	9,159	3,663
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	9,745	3,935	16,678	8,233
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	$ 6,427	$ 2,021	$ 8,803	$ 3,765

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References + Details

Equity Award Plans Allocation of Share-based Compensation 2 (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense	$ 24,384,000	$ 8,754,000	$ 38,795,000	$ 17,096,000
Total compensation cost not yet recognized, nonvested awards, net of estimated forfeitures	266,970,000		$ 266,970,000
Period for Recognition of Total Compensation Cost Not yet Recognized (in years)			3 years
Plan Modification, Incremental Compensation Cost	3,384,000	461,000	$ 3,384,000	1,861,000
Employee Stock Purchase Plan (ESPP)
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense	$ 1,073,000	$ 1,467,000	$ 2,075,000	$ 2,811,000

- Definition

+ References + Details

Income Taxes (Details)	3 Months Ended		6 Months Ended
Income Taxes (Details)	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Income Tax Disclosure [Abstract]
Effective income tax rate	(7.00%)	(24.40%)	(8.80%)	(15.50%)

Net Income (Loss) Per Share (Computation of Basic and Diluted Net Income (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net loss attributable to common stockholders	$ (39,946)	$ (2,613)	$ (47,807)	$ (6,128)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted (in shares)	72,854	67,651	72,260	67,225
Net loss per share attributable to common stockholders, basic and diluted (in usd per share)	$ (0.55)	$ (0.04)	$ (0.66)	$ (0.09)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Net Income (Loss) Per Share (Schedule of Antidilutive Securities Excluded from Computation) (Details) - shares shares in Thousands	6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	7,807	12,797
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	5,201	1,580
ESPP shares
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	132	0

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details