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Document and Entity Information Document - shares	3 Months Ended
Document and Entity Information Document - shares	Oct. 31, 2013	Nov. 15, 2013
Document Information [Abstract]
Entity Registrant Name	Palo Alto Networks Inc
Entity Central Index Key	0001327567
Document Type	10-Q
Document Period End Date	Oct. 31, 2013
Amendment Flag	false
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Document Fiscal Year End Date	--07-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		72,491,140

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2013	Jul. 31, 2013
Current assets:
Cash and cash equivalents	$ 266,182	$ 310,614
Short-term investments	170,551	109,007
Accounts receivable, net of allowance for doubtful accounts of $486 and $51 at October 31, 2013 and July 31, 2013, respectively	91,439	87,461
Prepaid expenses and other current assets	24,160	22,617
Total current assets	552,332	529,699
Property and equipment, net	42,409	32,086
Long-term investments	33,642	17,314
Other assets	11,560	6,507
Total assets	639,943	585,606
Current liabilities:
Accounts payable	15,218	15,544
Accrued and other liabilities	17,876	14,609
Accrued compensation	23,618	22,004
Deferred revenue	171,617	153,945
Total current liabilities	228,329	206,102
Deferred revenue—non-current	107,339	95,285
Other long-term liabilities	14,496	11,799
Commitments and contingencies (Note 5)
Stockholders' equity:
Preferred stock; $0.0001 par value; 100,000 shares authorized; none issued and outstanding at October 31, 2013 and July 31, 2013	0	0
Common stock, $0.0001 par value; 1,000,000 shares authorized; 72,483 and 71,612 shares issued and outstanding at October 31, 2013 and July 31, 2013, respectively	7	7
Additional paid-in capital	406,902	381,703
Accumulated other comprehensive income (loss)	5	(16)
Accumulated deficit	(117,135)	(109,274)
Total stockholders’ equity	289,779	272,420
Total liabilities and stockholders’ equity	$ 639,943	$ 585,606

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2013	Jul. 31, 2013
Current assets:
Allowance for doubtful accounts (in usd)	$ 486	$ 51
Stockholders' equity:
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common Stock, Shares, Issued	72,483,000	71,612,000
Common Stock, Shares, Outstanding	72,483,000	71,612,000

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Revenue:
Product	$ 75,485	$ 55,514
Services	52,695	30,420
Total revenue	128,180	85,934
Cost of revenue:
Product	17,954	14,416
Services	15,853	9,774
Total cost of revenue	33,807	24,190
Total gross profit	94,373	61,744
Operating expenses:
Research and development	19,893	13,312
Sales and marketing	67,366	42,607
General and administrative	14,125	8,956
Total operating expenses	101,384	64,875
Operating loss	(7,011)	(3,131)
Interest income	160	98
Other income (expense), net	237	(170)
Loss before income taxes	(6,614)	(3,203)
Provision for income taxes	1,247	312
Net loss	(7,861)	(3,515)
Net loss attributable to common stockholders	$ (7,861)	$ (3,515)
Net loss per share attributable to common stockholders, basic and diluted (in usd per share)	$ (0.11)	$ (0.05)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted (in shares)	71,681	66,813

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Net loss	$ (7,861)	$ (3,515)
Other comprehensive loss, net of tax:
Change in unrealized gains (loss) on investments	21	(27)
Comprehensive loss	$ (7,840)	$ (3,542)

- 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.

+ References

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+ Details

- Definition

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

+ References

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+ Details

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Cash flows from operating activities
Net loss	$ (7,861)	$ (3,515)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	3,146	2,053
Amortization of investment premiums, net of accretion of purchase discounts	386	316
Share-based compensation for equity based awards	14,383	8,284
Excess tax benefit from share-based compensation	(56)	0
Changes in operating assets and liabilities:
Accounts receivable, net	(3,978)	(10,727)
Prepaid expenses and other assets	(1,707)	(3,830)
Accounts payable	(205)	1,076
Accrued and other liabilities	5,047	4,819
Deferred revenue	29,726	24,600
Net cash provided by operating activities	38,881	23,076
Cash flows from investing activities
Purchase of property, equipment, and other assets	(15,680)	(4,015)
Purchase of investments	(122,238)	(168,475)
Proceeds from maturities of investments	43,959	0
Net cash used in investing activities	(93,959)	(172,490)
Cash flows from financing activities
Excess tax benefit from share-based compensation	56	0
Proceeds from exercise of stock options	4,610	1,534
Proceeds from employee stock purchase plan	5,988	0
Payments of initial public offering costs	0	(265)
Repurchase of restricted common stock from terminated employees	(8)	(24)
Net cash provided by financing activities	10,646	1,245
Net decrease in cash and cash equivalents	(44,432)	(148,169)
Cash and cash equivalents—beginning of period	310,614	322,642
Cash and cash equivalents—end of period	266,182	174,473
Non-cash investing and financing activities
Purchase of property, equipment, and other assets not yet paid	$ 3,556	$ 0

Description of Business and Summary of Significant Accounting Policies	3 Months Ended
	Oct. 31, 2013
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 the 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 compared to those described in our Annual Report on Form 10-K for the fiscal year ended July 31, 2013. Warranties We generally provide a one-year warranty on hardware and a three-month warranty on software. We are indemnified by our contract manufacturer for product liability claims arising out of manufacturing defects. We accrue for potential warranty claims as a component of cost of product revenues based on historical experience and other data. Accrued warranty is recorded in accrued liabilities on the condensed consolidated balance sheets and is reviewed periodically for adequacy. To date, we have not accrued any significant costs associated with our warranty. 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

3 Months Ended

Oct. 31, 2013

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):



	October 31, 2013								July 31, 2013
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents:
Certificates of deposit	$	1,926	$	—	$	—	$	1,926	$	1,822	$	—	$	—	$	1,822
U.S. government and agency securities	—		80,062		—		80,062		—		46,700		—		46,700
Money market funds	—		—		—		—		131,845		—		—		131,845
Total cash equivalents	1,926		80,062		—		81,988		133,667		46,700		—		180,367
Short-term investments:
Corporate debt securities	—		27,292		—		27,292		—		32,834		—		32,834
U.S. government and agency securities	—		143,259		—		143,259		—		76,173		—		76,173
Total short-term investments	—		170,551		—		170,551		—		109,007		—		109,007
Long-term investments:
Corporate debt securities	—		6,097		—		6,097		—		12,317		—		12,317
U.S. government and agency securities	—		27,545		—		27,545		—		4,997		—		4,997
Total long-term investments	—		33,642		—		33,642		—		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	$	3,146	$	284,255	$	—	$	287,401	$	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

3 Months Ended

Oct. 31, 2013

Investments, Debt and Equity Securities [Abstract]

Investments

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



	October 31, 2013
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Certificates of deposit	$	1,926	$	—	$	—		$	1,926
Corporate debt securities	33,367		25		(3		)	33,389
U.S. government and agency securities	250,883		7		(24		)	250,866
Total	$	286,176	$	32	$	(27	)	$	286,181



	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 October 31, 2013 and July 31, 2013 (in thousands):



	October 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	$	4,557	$	(2	)	$	2,060	$	(1	)	$	6,617	$	(3	)
U.S. government and agency securities	162,279		(24		)	—		—			162,279		(24		)
Total	$	166,836	$	(26	)	$	2,060	$	(1	)	$	168,896	$	(27	)



	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 October 31, 2013.

The amortized cost and fair value of our investments at October 31, 2013, by contractual years-to-maturity, are as follows (in thousands):



	Amortized Cost		Fair Value
Due within one year	$	263,528	$	263,542
Due within one to two years	22,648		22,639
Total	$	286,176	$	286,181

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-Glossary Debt Security
-URI http://asc.fasb.org/extlink&oid=6509901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

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-Glossary Equity Security
-URI http://asc.fasb.org/extlink&oid=6511694

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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

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-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 3, 19, 20, 21, 22, 137
-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

Intangible Assets

3 Months Ended

Oct. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Disclosure

Intangible Assets

Intangible assets included in other assets consisted of the following (in thousands):



	October 31, 2013			July 31, 2013
Acquired intellectual property	$	6,546		$	1,546
Less: amortization	(343		)	(188		)
Total	$	6,203		$	1,358

Amortization expense was $155,000 and $13,000 for the first quarter of fiscal 2014 and 2013, respectively. 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.

The following table summarizes estimated future amortization expense of intangible assets as of October 31, 2013 (in thousands):



	Amount
Years ending July 31:
Remaining 2014	$	615
2015	761
2016	704
2017	611
2018	484
2019 and thereafter	3,028
Total	$	6,203

Commitments and Contingencies

3 Months Ended

Oct. 31, 2013

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 aggregate future non-cancelable minimum rental payments on our operating leases, as of October 31, 2013, are as follows (in thousands):



	Amount
Years ending July 31:
Remaining 2014	$	7,038
2015	13,416
2016	13,563
2017	12,591
2018	11,427
2019 and thereafter	52,300
Committed gross lease payments	110,335
Less: proceeds from sublease rental	(10,700		)
Net operating lease obligation	$	99,635

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 October 31, 2013, we had $25,300,000 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 has not yet ruled on those petitions. A hearing to resolve claim construction issues, as well as motions for summary judgment, was heard on November 15, 2013.

A trial date has been scheduled for 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. We have not yet responded to Juniper’s counterclaims.

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
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

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-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-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 5
-Paragraph 9, 10, 11, 12
-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

Equity Award Plans

3 Months Ended

Oct. 31, 2013

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 periods 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	(154	)	10.82
Options exercised	(676	)	6.82
Balance—October 31, 2013	9,203		12.12		7.6	$	276,458
Options vested and expected to vest—October 31, 2013	8,859		$	11.96	7.6	$	267,542
Options exercisable—October 31, 2013	4,950		$	8.79	7.3	$	165,182

Restricted Stock Units (RSUs) Activities

A summary of the activity under our stock plans and changes during the reporting periods 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	459		46.03
RSUs vested	(52	)	64.35
RSUs forfeited	(83	)	55.20
Balance—October 31, 2013	2,565		$	52.63	1.5	$	108,140
RSUs vested and expected to vest—October 31, 2013	2,315		$	52.74	1.4	$	97,600

Employee Stock Purchase Plan (ESPP)

During the three months ended October 31, 2013 and 2012, compensation expense recognized in connection with the 2012 Employee Stock Purchase Plan was $1,002,000 and $1,344,000, 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 October 31,
	2013	2012
Risk-free interest rate	—%	N/A
Expected term (years)	< 1 year	N/A
Volatility	39%	N/A
Dividend yield	—%	N/A

Share-based compensation is included in costs and expenses as follows (in thousands):



	Three Months Ended October 31,
	2013		2012
Cost of revenue	$	1,663	$	610
Research and development	3,262		1,690
Sales and marketing	6,628		4,298
General and administrative	2,858		1,744
Total	$	14,411	$	8,342

During the three months ended October 31, 2012, we modified the terms of certain share-based awards and as a result, we recorded compensation expense within sales and marketing expense of $1,400,000.

At October 31, 2013, total compensation cost related to unvested share-based awards granted to employees under our stock plans but not yet recognized was $137,222,000, 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.

- 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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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	3 Months Ended
Income Taxes	Oct. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our provision for income taxes for the three months ended October 31, 2013 reflects an effective tax rate of negative 19%, and consists of foreign income, withholding taxes, and limited state income tax due to our net operating loss carryforwards and other tax attributes. Our provision for income taxes for the three months ended October 31, 2012 reflected an effective tax rate of negative 10% and consists of foreign income and 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))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
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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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-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-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 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

3 Months Ended

Oct. 31, 2013

Earnings Per Share [Abstract]

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 income (loss) per share of common stock (in thousands, except per share data):



	Three Months Ended October 31,
	2013			2012
Net loss attributable to common stockholders	$	(7,861	)	$	(3,515	)
Weighted-average shares used to compute net loss per share, basic and diluted	71,681			66,813
Net loss per share attributable to common stockholders, basic and diluted	$	(0.11	)	$	(0.05	)

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



	October 31, 2013	October 31, 2012
Options to purchase common stock	9,203	13,408
RSUs	2,565	216
ESPP shares	53	—

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

3 Months Ended

Oct. 31, 2013

Organization, Consolidation and Presentation of Financial Statements [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 the 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.

Warranties

We generally provide a one-year warranty on hardware and a three-month warranty on software. We are indemnified by our contract manufacturer for product liability claims arising out of manufacturing defects. We accrue for potential warranty claims as a component of cost of product revenues based on historical experience and other data. Accrued warranty is recorded in accrued liabilities on the condensed consolidated balance sheets and is reviewed periodically for adequacy. To date, we have not accrued any significant costs associated with our warranty

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 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
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-Section 45
-URI http://asc.fasb.org/section&trid=2197723

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 325
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-URI http://asc.fasb.org/subtopic&trid=2197087

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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=18733093&loc=d3e5614-111684

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-Name FASB Interpretation (FIN)
-Number 46R
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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 10: http://www.xbrl.org/2003/role/presentationRef
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-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
-Publisher FASB
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-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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-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 13: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 20
-Subparagraph a(2)
-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 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
-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 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 97-2
-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 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
-Paragraph 46
-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 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02, 03
-Article 3A

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 14, 15
-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)

3 Months Ended

Oct. 31, 2013

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):



	October 31, 2013								July 31, 2013
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents:
Certificates of deposit	$	1,926	$	—	$	—	$	1,926	$	1,822	$	—	$	—	$	1,822
U.S. government and agency securities	—		80,062		—		80,062		—		46,700		—		46,700
Money market funds	—		—		—		—		131,845		—		—		131,845
Total cash equivalents	1,926		80,062		—		81,988		133,667		46,700		—		180,367
Short-term investments:
Corporate debt securities	—		27,292		—		27,292		—		32,834		—		32,834
U.S. government and agency securities	—		143,259		—		143,259		—		76,173		—		76,173
Total short-term investments	—		170,551		—		170,551		—		109,007		—		109,007
Long-term investments:
Corporate debt securities	—		6,097		—		6,097		—		12,317		—		12,317
U.S. government and agency securities	—		27,545		—		27,545		—		4,997		—		4,997
Total long-term investments	—		33,642		—		33,642		—		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	$	3,146	$	284,255	$	—	$	287,401	$	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
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-Name Accounting Standards Codification
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Reference 3: 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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-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)

3 Months Ended

Oct. 31, 2013

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 October 31, 2013 and July 31, 2013 (in thousands):



	October 31, 2013
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Certificates of deposit	$	1,926	$	—	$	—		$	1,926
Corporate debt securities	33,367		25		(3		)	33,389
U.S. government and agency securities	250,883		7		(24		)	250,866
Total	$	286,176	$	32	$	(27	)	$	286,181



	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 October 31, 2013 and July 31, 2013 (in thousands):



	October 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	$	4,557	$	(2	)	$	2,060	$	(1	)	$	6,617	$	(3	)
U.S. government and agency securities	162,279		(24		)	—		—			162,279		(24		)
Total	$	166,836	$	(26	)	$	2,060	$	(1	)	$	168,896	$	(27	)



	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 amortized cost and fair value of our investments at October 31, 2013, by contractual years-to-maturity, are as follows (in thousands):



	Amortized Cost		Fair Value
Due within one year	$	263,528	$	263,542
Due within one to two years	22,648		22,639
Total	$	286,176	$	286,181

- 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

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-Name Accounting Standards Codification
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Reference 3: 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 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

Intangible Assets (Tables)

3 Months Ended

Oct. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Finite-Lived Intangible Assets and Related Amortization

Intangible assets included in other assets consisted of the following (in thousands):



	October 31, 2013			July 31, 2013
Acquired intellectual property	$	6,546		$	1,546
Less: amortization	(343		)	(188		)
Total	$	6,203		$	1,358

Finite-Lived Intangible Assets, Future Amortization Expense

The following table summarizes estimated future amortization expense of intangible assets as of October 31, 2013 (in thousands):



	Amount
Years ending July 31:
Remaining 2014	$	615
2015	761
2016	704
2017	611
2018	484
2019 and thereafter	3,028
Total	$	6,203

Commitments and Contingencies (Tables)

3 Months Ended

Oct. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

The aggregate future non-cancelable minimum rental payments on our operating leases, as of October 31, 2013, are as follows (in thousands):



	Amount
Years ending July 31:
Remaining 2014	$	7,038
2015	13,416
2016	13,563
2017	12,591
2018	11,427
2019 and thereafter	52,300
Committed gross lease payments	110,335
Less: proceeds from sublease rental	(10,700		)
Net operating lease obligation	$	99,635

Equity Award Plans (Tables)

3 Months Ended

Oct. 31, 2013

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	(154	)	10.82
Options exercised	(676	)	6.82
Balance—October 31, 2013	9,203		12.12		7.6	$	276,458
Options vested and expected to vest—October 31, 2013	8,859		$	11.96	7.6	$	267,542
Options exercisable—October 31, 2013	4,950		$	8.79	7.3	$	165,182

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	459		46.03
RSUs vested	(52	)	64.35
RSUs forfeited	(83	)	55.20
Balance—October 31, 2013	2,565		$	52.63	1.5	$	108,140
RSUs vested and expected to vest—October 31, 2013	2,315		$	52.74	1.4	$	97,600

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 October 31,
	2013	2012
Risk-free interest rate	—%	N/A
Expected term (years)	< 1 year	N/A
Volatility	39%	N/A
Dividend yield	—%	N/A

Schedule of Allocation of Share Based Compensation Expense

Share-based compensation is included in costs and expenses as follows (in thousands):



	Three Months Ended October 31,
	2013		2012
Cost of revenue	$	1,663	$	610
Research and development	3,262		1,690
Sales and marketing	6,628		4,298
General and administrative	2,858		1,744
Total	$	14,411	$	8,342

- 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)

3 Months Ended

Oct. 31, 2013

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 income (loss) per share of common stock (in thousands, except per share data):



	Three Months Ended October 31,
	2013			2012
Net loss attributable to common stockholders	$	(7,861	)	$	(3,515	)
Weighted-average shares used to compute net loss per share, basic and diluted	71,681			66,813
Net loss per share attributable to common stockholders, basic and diluted	$	(0.11	)	$	(0.05	)

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



	October 31, 2013	October 31, 2012
Options to purchase common stock	9,203	13,408
RSUs	2,565	216
ESPP shares	53	—

Description of Business and Summary of Significant Accounting Policies (Details)	3 Months Ended
	Oct. 31, 2013
Hardware
Description of Business and Summary of Significant Accounting Policies
Product warranty term	1 year
Software
Description of Business and Summary of Significant Accounting Policies
Product warranty term	3 months

Fair Value Measurements (Details) - USD ($) $ in Thousands	Oct. 31, 2013	Jul. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	$ 170,551	$ 109,007
Long-term investments	33,642	17,314
Other assets	1,220	1,221
Total assets measured at fair value	287,401	307,909
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Long-term investments	0	0
Other assets	1,220	1,221
Total assets measured at fair value	3,146	134,888
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	170,551	109,007
Long-term investments	33,642	17,314
Other assets	0	0
Total assets measured at fair value	284,255	173,021
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Long-term investments	0	0
Other assets	0	0
Total assets measured at fair value	0	0
Cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	81,988	180,367
Cash equivalents \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	1,926	133,667
Cash equivalents \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	80,062	46,700
Cash equivalents \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	1,926	1,822
Other assets	1,220	1,221
Certificates of deposit \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	1,926	1,822
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
Other assets	0	0
Certificates of deposit \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	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	80,062	46,700
Short-term investments	143,259	76,173
Long-term investments	27,545	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	80,062	46,700
Short-term investments	143,259	76,173
Long-term investments	27,545	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	27,292	32,834
Long-term investments	6,097	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	27,292	32,834
Long-term investments	6,097	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	Oct. 31, 2013	Jul. 31, 2013
Schedule of Available-for-sale Securities
Amortized Cost	$ 286,176	$ 306,704
Unrealized Gains	32	20
Unrealized Losses	(27)	(36)
Estimated Fair Value	286,181	306,688
Certificates of deposit
Schedule of Available-for-sale Securities
Amortized Cost	1,926	1,822
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	1,926	1,822
Corporate debt securities
Schedule of Available-for-sale Securities
Amortized Cost	33,367	45,173
Unrealized Gains	25	12
Unrealized Losses	(3)	(34)
Estimated Fair Value	33,389	45,151
U.S. government and agency securities
Schedule of Available-for-sale Securities
Amortized Cost	250,883	127,864
Unrealized Gains	7	8
Unrealized Losses	(24)	(2)
Estimated Fair Value	$ 250,866	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	Oct. 31, 2013	Jul. 31, 2013
Schedule of Available-for-sale Securities
Less than 12 Months, Fair Value	$ 166,836	$ 47,355
12 Months or Greater, Fair Value	2,060	0
Total, Unrealized Loss Position, Fair Value	168,896	47,355
Less than 12 Months, Unrealized Loss	(26)	(36)
12 Months or Greater, Unrealized Loss	(1)	0
Total, Unrealized Loss	(27)	(36)
Corporate debt securities
Schedule of Available-for-sale Securities
Less than 12 Months, Fair Value	4,557	31,429
12 Months or Greater, Fair Value	2,060	0
Total, Unrealized Loss Position, Fair Value	6,617	31,429
Less than 12 Months, Unrealized Loss	(2)	(34)
12 Months or Greater, Unrealized Loss	(1)	0
Total, Unrealized Loss	(3)	(34)
U.S. government and agency securities
Schedule of Available-for-sale Securities
Less than 12 Months, Fair Value	162,279	15,926
12 Months or Greater, Fair Value	0	0
Total, Unrealized Loss Position, Fair Value	162,279	15,926
Less than 12 Months, Unrealized Loss	(24)	(2)
12 Months or Greater, Unrealized Loss	0	0
Total, Unrealized Loss	$ (24)	$ (2)

Investments (Available-for-Sale Investments, Contractual Maturities) (Details) $ in Thousands	Oct. 31, 2013 USD ($)
Amortized Cost
Due within one year	$ 263,528
Due within one to two years	22,648
Total	286,176
Fair Value
Due within one year	263,542
Due within one to two years	22,639
Total	$ 286,181

- 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

Intangible Assets (Details) - Patents - USD ($) $ in Thousands	Oct. 31, 2013	Jul. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intellectual property	$ 6,546	$ 1,546
Less: amortization	(343)	(188)
Total	$ 6,203	$ 1,358

Intangible Assets Amortization expense (Details) - Patents - USD ($)	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 155,000	$ 13,000
Acquired Finite-lived Intangible Asset, Amount	$ 5,000,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years

Intangible Assets Future Amortization Expense (Details) - Patents - USD ($) $ in Thousands	Oct. 31, 2013	Jul. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining 2014	$ 615
2015	761
2016	704
2017	611
2018	484
2019 and thereafter	3,028
Total	$ 6,203	$ 1,358

Commitments and Contingencies Lease commitment schedule (Details) $ in Thousands	Oct. 31, 2013 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remaining 2014	$ 7,038
2015	13,416
2016	13,563
2017	12,591
2018	11,427
2019 and thereafter	52,300
Committed gross lease payments	110,335
Less: proceeds from sublease rental	(10,700)
Net operating lease obligation	$ 99,635

Commitments and Contingencies (Textuals) (Details) $ in Thousands	Oct. 31, 2013 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Contractual Obligation	$ 25,300

Equity Award Plans (Stock Options Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 31, 2013	Jul. 31, 2013
Options, Outstanding Roll Forward
Balance, beginning (in shares)	10,033
Options granted (in shares)	0
Options forfeited (in shares)	(154)
Options exercised (in shares)	(676)
Balance, ending (in shares)	9,203	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)	10.82
Options exercised (in usd per share)	6.82
Balance, ending (in usd per share)	$ 12.12	$ 11.74
Options, Additional Disclosures
Weighted-Average Remaining Contractual Life	7 years 7 months	7 years 9 months
Aggregate Intrinsic Value	$ 276,458	$ 373,228
Options vested and expected to vest, Number of Shares	8,859
Options vested and expected to vest, Weighted-Average Exercise Price	$ 11.96
Options vested and exected to vest, Weighted-Average Remaining Contractual Term	7 years 7 months
Options vested and expected to vest, Aggregate Intrinsic Value	$ 267,542
Options exercisable, Number of Shares	4,950
Options exercisable, Weighted-Average Exercise Price	$ 8.79
Options exercisable, Weighted-Average Remaining Contractual Term	7 years 3 months
Optios exercisable, Aggregate Intrinsic Value	$ 165,182

Equity Award Plans (Restricted Stock Units Award Activity) (Details) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 31, 2013	Jul. 31, 2013
RSUs, Outstanding Roll Forward
Balance, beginning (in shares)	2,241
RSUs granted (in shares)	459
RSUs vested (in shares)	(52)
RSUs forfeited (in shares)	(83)
Balance, ending (in shares)	2,565	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)	46.03
RSUs vested (in usd per share)	64.35
RSUs forfeited (in usd per share)	55.20
Balance, ending (in usd per share)	$ 52.63	$ 54.36
RSUs, Additional Disclosures
Weighted-Average Remaining Contractual Term	1 year 6 months	1 year 6 months
Aggregate Intrinsic Value	$ 108,140	$ 109,675
RSUs vested and expected to vest, Number of Shares	2,315
RSUs vested and expected to vest, Weighted-Average Grant-Date Fair Value Per Share	$ 52.74
RSUs vested and expected to vest, Weighted-Average Remaining Contractual Term	1 year 5 months
RSUs vested and expected to vest, Aggregate Intrinsic Value	$ 97,600

Equity Award Plans Employee Stock Purchase Plan, Valuation Assumptions (Details) - Employee Stock Purchase Plan (ESPP)	3 Months Ended
	Oct. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award
Risk-free interest rate	0.00%
Expected Term	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
	Oct. 31, 2013	Oct. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	$ 14,411	$ 8,342
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	1,663	610
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	3,262	1,690
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	6,628	4,298
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	$ 2,858	$ 1,744

- 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 ($) $ in Thousands	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award
Total compensation cost not yet recognized, nonvested awards, net of estimated forfeitures	$ 137,222
Allocated Share-based Compensation Expense	$ 14,411	$ 8,342
Period for Recognition of Total Compensation Cost Not yet Recognized	3 years
Plan Modification, Incremental Compensation Cost		1,400
Employee Stock Purchase Plan (ESPP)
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense	$ 1,002	$ 1,344

- Definition

+ References + Details

Income Taxes (Details)	3 Months Ended
Income Taxes (Details)	Oct. 31, 2013	Oct. 31, 2012
Income Tax Disclosure [Abstract]
Effective income tax rate	(19.00%)	(10.00%)

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
	Oct. 31, 2013	Oct. 31, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net loss attributable to common stockholders	$ (7,861)	$ (3,515)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted (in shares)	71,681	66,813
Net loss per share attributable to common stockholders, basic and diluted (in usd per share)	$ (0.11)	$ (0.05)

- 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	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	9,203	13,408
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	2,565	216
ESPP shares
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	53	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