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Document and Entity Information Document - shares	3 Months Ended
Document and Entity Information Document - shares	Oct. 31, 2012	Nov. 30, 2012
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, 2012
Amendment Flag	false
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Document Fiscal Year End Date	--07-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		68,450,201

BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2012	Jul. 31, 2012
Current assets:
Cash and cash equivalents	$ 174,473	$ 322,642
Short-term investments	147,084	0
Accounts receivable, net of allowance for doubtful accounts of $177 and $164 at October 31, 2012 and July 31, 2012, respectively	56,369	45,642
Prepaid expenses and other current assets	16,813	13,373
Total current assets	394,739	381,657
Property and equipment, net	22,965	20,979
Long-term investments	20,567	0
Other assets	6,026	5,168
Total assets	444,297	407,804
Current liabilities:
Accounts payable	10,290	9,214
Accrued liabilities	14,743	15,189
Accrued compensation	16,171	11,307
Deferred revenue	101,412	86,296
Total current liabilities	142,616	122,006
Deferred revenue-non-current	58,996	49,512
Other long-term liabilities	6,896	7,215
Commitments and contingencies (Note 4)
Stockholders' equity:
Preferred stock; $0.0001 par value; 100,000 shares authorized; none issued and outstanding at October 31, 2012 and July 31, 2012	0	0
Common stock, $0.0001 par value; 1,000,000 shares authorized; 68,445 and 67,852 shares issued and 68,445 and 67,852 shares outstanding at October 31, 2012 and July 31, 2012, respectively	7	7
Additional paid-in capital	319,352	309,092
Accumulated other comprehensive loss	(27)	0
Accumulated deficit	(83,543)	(80,028)
Total stockholders' equity	235,789	229,071
Total liabilities and stockholders' equity	$ 444,297	$ 407,804

BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2012	Jul. 31, 2012
Current assets:
Allowance for doubtful accounts	$ 177	$ 164
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	68,445,000	67,852,000
Common stock, shares outstanding	68,445,000	67,852,000

STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Revenue:
Product	$ 55,514	$ 42,861
Services	30,420	14,252
Total revenue	85,934	57,113
Cost of revenue:
Product	14,416	10,310
Services	9,774	4,530
Total cost of revenue	24,190	14,840
Total gross profit	61,744	42,273
Operating expenses:
Research and development	13,312	7,848
Sales and marketing	42,607	22,368
General and administrative	8,956	5,157
Total operating expenses	64,875	35,373
Operating income (loss)	(3,131)	6,900
Interest income	98	2
Other expense, net	(170)	(464)
Income (loss) before income taxes	(3,203)	6,438
Provision for income taxes	312	2,322
Net income (loss)	(3,515)	4,116
Net income (loss) attributable to common stockholders, basic and diluted	$ (3,515)	$ 0
Net income (loss) per share attributable to common stockholders, basic and diluted (in usd per share)	$ (0.05)	$ 0.00
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, basic and diluted (in shares)	66,813	16,715

STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	Oct. 31, 2012	Oct. 31, 2011
Net income (loss)	$ (3,515)	$ 4,116
Other comprehensive income (loss):
Unrealized gains (losses) on investments	(27)	0
Comprehensive income (loss)	$ (3,542)	$ 4,116

- 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

STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	Oct. 31, 2012	Oct. 31, 2011
Cash flows from operating activities
Net income (loss)	$ (3,515)	$ 4,116
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	2,053	1,150
Amortization of investment premiums, net of accretion of purchase discounts	316	0
Share-based compensation for equity based awards	8,284	1,449
Change in fair value of preferred stock warrants	0	404
Changes in operating assets and liabilities:
Accounts receivable, net	(10,727)	(5,602)
Prepaid expenses and other assets	(3,830)	(2,661)
Accounts payable	1,076	736
Accrued and other liabilities	4,819	2,096
Deferred revenue	24,600	18,904
Net cash provided by operating activities	23,076	20,592
Cash flows from investing activities
Purchase of property, equipment, and other assets	(4,015)	(2,732)
Purchase of investments	(168,475)	0
Net cash used in investing activities	(172,490)	(2,732)
Cash flows from financing activities
Changes in restricted cash	0	1,221
Proceeds from exercise of stock options	1,534	287
Payments of initial public offering costs	(265)	0
Repurchase of restricted common stock from employees	(24)	(59)
Net cash provided by financing activities	1,245	1,449
Net increase (decrease) in cash and cash equivalents	(148,169)	19,309
Cash and cash equivalents-beginning of period	322,642	40,517
Cash and cash equivalents-end of period	174,473	59,826
Supplemental disclosures of cash flow information
Cash paid for income taxes	369	97
Cash paid for interest	38	4
Supplemental disclosures of non-cash investing and financing activities
Change in liability for early exercise of stock options, net of vested portion	$ (466)	$ (165)

Description of Business and Summary of Significant Accounting Policies	3 Months Ended
	Oct. 31, 2012
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., 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 distributors, resellers, and strategic partners, and infrequently directly to end-customers (collectively partners), who 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). Initial Public Offering In July 2012, we completed our initial public offering whereby 6,200,000 shares of common stock were sold to the public at a price of $42.00 per share. We sold 4,687,000 common shares and selling stockholders sold 1,513,000 common shares. In connection with the exercise of the underwriters’ over-allotment option, 930,000 additional shares of common stock were sold to the public at the initial offering price of $42.00 per share. We received aggregate proceeds of $219,400,000 from the initial public offering and the underwriters’ over-allotment option, net of underwriters’ discounts and commissions, but before deducting paid and unpaid offering expenses of approximately $4,000,000. Upon the closing of the initial public offering, all shares of our outstanding redeemable convertible preferred stock automatically converted into 41,305,000 shares of common stock. Secondary Offering In October 2012, we completed our secondary offering whereby certain stockholders of our company sold 4,800,000 shares of common stock to the public at a price of $63.00 per share. The aggregate offering price for shares sold in the offering was approximately $290,304,000, net of underwriting discounts and commissions. We did not receive any proceeds from the sale of shares in this offering. Offering expenses were paid by the stockholders who sold shares of common stock in the offering. Basis of Presentation and Consolidation The condensed consolidated financial statements include the accounts of the Company, and its wholly owned subsidiaries (collectively, the “Company,” “we,” “us,” or “our”). 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 the those described in our Annual Report on Form 10-K for the fiscal year ended July 31, 2012 except as disclosed below. Investments We classify our investments as available-for-sale at the time of purchase since it is our intent that these investments are available for current operations, and include these investments on our balance sheet as either short-term or long-term investments depending on their maturity. Investments not considered cash equivalents and with maturities one year or less from the condensed consolidated balance sheet date are classified as short-term investments. Investments with maturities greater than one year from the condensed consolidated balance sheet date are classified as long-term investments. Investments are considered impaired when a decline in fair value is judged to be other-than-temporary. We consult with our investment managers and consider available quantitative and qualitative evidence in evaluating potential impairment of our investments on a quarterly basis. If the cost of an individual investment exceeds its fair value, we evaluate, among other factors, general market conditions, the duration and extent to which the fair value is less than cost, and our intent and ability to hold the investment. Once a decline in fair value is determined to be other-than-temporary, an impairment charge is recorded and a new cost basis in the investment is established. Warranties We generally provide a one-year warranty on hardware and a three-month warranty on software. 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 June 2011, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update 2011-05, Presentation of Comprehensive Income. The standard requires entities to have more detailed reporting of comprehensive income. The guidance was effective for us in the first quarter of fiscal 2013 and applied retrospectively. Our adoption of this guidance did not impact our condensed consolidated financial position, results of operations, or cash flows.

Fair Value Measurements

3 Months Ended

Oct. 31, 2012

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, 2012								July 31, 2012
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents:
U.S. government and agency securities	$	—	$	87,996	$	—	$	87,996	$	—	$	—	$	—	$	—
Money market funds	11,855		—		—		11,855		250,005		—		—		250,005
Total cash equivalents	11,855		87,996		—		99,851		250,005		—		—		250,005
Short-term investments:
Commercial paper	—		4,986		—		4,986		—		—		—		—
Corporate debt securities	—		18,899		—		18,899		—		—		—		—
U.S. government and agency securities	—		123,199		—		123,199		—		—		—		—
Total short-term investments	—		147,084		—		147,084		—		—		—		—
Long-term investments:
Corporate debt securities	—		13,558		—		13,558		—		—		—		—
U.S. government and agency securities	—		7,009		—		7,009		—		—		—		—
Total long-term investments	—		20,567		—		20,567		—		—		—		—
Other assets:
Restricted cash	1,221		—		—		1,221		1,221		—		—		1,221
Total other assets	1,221		—		—		1,221		1,221		—		—		1,221
Total assets measured at fair value	$	13,076	$	255,647	$	—	$	268,723	$	251,226	$	—	$	—	$	251,226

- 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, 2012

Investments, Debt and Equity Securities [Abstract]

Investments

Investments consist of the following (in thousands):



	October 31, 2012
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Commercial paper	$	4,990	$	—	$	(4	)	$	4,986
Corporate debt securities	32,463		18		(24		)	32,457
U.S. government and agency securities	218,221		1		(18		)	218,204
Money market funds	11,855		—		—			11,855
Total investments	$	267,529	$	19	$	(46	)	$	267,502

Investments in an unrealized loss position at October 31, 2012 consist of the following (in thousands):



	Less Than 12 Months					12 Months or Greater				Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Commercial paper	$	4,986	$	(4	)	$	—	$	—	$	4,986	$	(4	)
Corporate debt securities	14,541		(24		)	—		—		14,541		(24		)
U.S. government and agency securities	131,606		(18		)	—		—		131,606		(18		)
Total	$	151,133	$	(46	)	$	—	$	—	$	151,133	$	(46	)

Unrealized losses on the above investments are primarily 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, we do not consider these investments to be other-than-temporarily impaired at October 31, 2012.

The amortized cost and fair value of our investments at October 31, 2012, by contractual years-to-maturity, are as follows (in thousands):



	Amortized Cost		Fair Value
Due within one year	$	235,097	$	235,080
Due within one to two years	20,577		20,567
Instruments not due at a single maturity date	11,855		11,855
Total	$	267,529	$	267,502

- 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
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-Glossary Equity Security
-URI http://asc.fasb.org/extlink&oid=6511694

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563

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-Name Accounting Standards Codification
-Topic 942
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-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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-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Topic 320
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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

Commitments and Contingencies

3 Months Ended

Oct. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Leases

In September 2012, we entered into two lease agreements for space in Santa Clara, California with lease inception dates of November 2012 and August 2013. Both leases expire in July 2023 and allow for two separate five-year options to extend the lease term. Payments under these leases will be approximately $94,400,000 over the lease term. Each lease has a seven month rent holiday, which was included in the determination of rent expense.

The aggregate future non-cancelable minimum rental payments on our operating leases and the minimum purchase commitments of products and components with our independent contract manufacturer or suppliers at October 31, 2012 are as follows (in thousands):



	Payments Due by Period
	Total		Less Than 1 Year		1 - 3 Years		3- 5 Years		More Than 5 Years
			(in thousands)
Operating lease obligations	$	107,990	$	4,230	$	20,814	$	22,578	$	60,368
Purchase obligations	19,585		19,585		—		—		—
Total	$	127,575	$	23,815	$	20,814	$	22,578	$	60,368

Litigation

Beginning in January 2009, Fortinet, Inc. began filing a series of complaints against us in the U.S. District Court for the Northern District of California alleging, among other claims, patent infringement. In January 2011, we entered into a settlement agreement with Fortinet, Inc. to the mutual satisfaction of both parties. Under the terms of the settlement agreement, we agreed to pay Fortinet, Inc. $6,000,000 over a period of three years. We recorded the cost related to the settlement as of October 31, 2010. As of October 31, 2012, $1,250,000 remained payable under this settlement and is included in accrued and other long-term liabilities in our condensed consolidated statement of financial position.

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 and 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.

A trial date has been scheduled for February 24, 2014, and we are vigorously defending ourselves from such claims. Given the early stage in the litigation, we are unable to estimate a possible loss or range of possible loss.

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. We do not currently believe that it is reasonably possible that additional losses in connection with litigation arising in the ordinary course of business would be material.

- 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
-Topic 210
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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=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, 2012

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

Equity Award Plans

A summary of the activity under our stock plans and changes during the reporting periods and a summary of information related to options exercisable and options and restricted stock units (RSUs) 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, 2012	14,225		$	9.46	8.3	$	678,248
Options granted	—		—
Options forfeited	(217	)	10.09
Options repurchased	—		—
Options exercised	(600	)	2.56
Balance—October 31, 2012	13,408		9.76		8.0	$	606,310
Options vested and expected to vest—October 31, 2012	12,690		$	9.51	7.9	$	577,014
Options exercisable—October 31, 2012	4,513		$	3.45	6.2	$	232,555



	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, 2012	—	$	—	—	$	—
RSUs granted	216	65.89
RSUs vested	—	—
RSUs forfeited	—	—
Balance—October 31, 2012	216	$	65.89	2.1	$	11,876
RSUs vested and expected to vest—October 31, 2012	190	$	—	2.0	$	10,446

The following table summarizes the assumptions relating to our stock options as follows:



		Three Months Ended October 31, 2011
Risk-free interest rate		0.7%
Expected term		4 years
Volatility		50%
Dividend yield		—%

During the three months ended October 31, 2012, compensation expense recognized in connection with the 2012 Employee Stock Purchase Plan was $1,344,000.

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



	Three Months Ended October 31,
	2012		2011
Cost of revenue	$	610	$	107
Research and development	1,690		325
Sales and marketing	4,298		477
General and administrative	1,744		540
Total	$	8,342	$	1,449

At October 31, 2012, total compensation cost related to unvested share-based awards granted to employees under our stock plans but not yet recognized was $67,242,000, 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.

For the first quarter of fiscal 2013, we modified the terms of certain share-based awards for an employee and as a result, we recorded $1,400,000 of compensation expense within sales and marketing expense.

- 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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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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-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, 2012
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our provision for income taxes for the three month period ended October 31, 2012 reflects an effective tax rate of negative 10% and primarily consists of foreign income and withholding taxes. Our provision for income taxes for the three month period ended October 31, 2011 reflected an effective tax rate of 36% and primarily consisted of U.S. federal alternative minimum tax, state income taxes, and 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
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-Name Accounting Standards Codification
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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
-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, 2012

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. Immediately prior to the completion of our initial public offering on July 19, 2012, all shares of outstanding redeemable convertible preferred stock were automatically converted to common stock. Prior to the conversion of redeemable convertible preferred stock, we considered all series of our redeemable convertible preferred stock to be participating securities as the holders were entitled to participate in common stock dividends with common stock on an as-converted basis. The holders of our redeemable convertible preferred stock were also entitled to non-cumulative dividends prior and in preference to common stock and did not have a contractual obligation to share in the losses of the Company. Additionally, 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,
	2012			2011
Net income (loss) used to compute net income (loss) per share:
Net income (loss)	$	(3,515	)	$	4,116
Less: undistributed earnings allocated to participating securities	—			(4,116		)
Net income (loss) attributable to common stockholders	$	(3,515	)	$	—
Weighted-average shares used to compute net income (loss) per share, basic and diluted	66,813			16,715
Net income (loss) per share attributable to common stockholders, basic and diluted	$	(0.05	)	$	0.00

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



	Three Months Ended October 31,
	2012	2011
Options to purchase common stock	13,408	10,764
RSUs	216	—
Redeemable convertible preferred stock	—	41,084
Warrants to purchase redeemable convertible preferred stock	—	225

Subsequent Events	3 Months Ended
Subsequent Events	Oct. 31, 2012
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In November 2012, we granted 68,950 restricted stock units to employees with a grant date fair value of approximately $3,752,000. These restricted stock units vest over a four year service period.

Description of Business and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Oct. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The condensed consolidated financial statements include the accounts of the Company, and its wholly owned subsidiaries (collectively, the “Company,” “we,” “us,” or “our”). All significant intercompany balances and transactions have been eliminated in consolidation.
Investments	Investments We classify our investments as available-for-sale at the time of purchase since it is our intent that these investments are available for current operations, and include these investments on our balance sheet as either short-term or long-term investments depending on their maturity. Investments not considered cash equivalents and with maturities one year or less from the condensed consolidated balance sheet date are classified as short-term investments. Investments with maturities greater than one year from the condensed consolidated balance sheet date are classified as long-term investments. Investments are considered impaired when a decline in fair value is judged to be other-than-temporary. We consult with our investment managers and consider available quantitative and qualitative evidence in evaluating potential impairment of our investments on a quarterly basis. If the cost of an individual investment exceeds its fair value, we evaluate, among other factors, general market conditions, the duration and extent to which the fair value is less than cost, and our intent and ability to hold the investment. Once a decline in fair value is determined to be other-than-temporary, an impairment charge is recorded and a new cost basis in the investment is established.
Warranties	Warranties We generally provide a one-year warranty on hardware and a three-month warranty on software. 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	Recent Accounting Pronouncements In June 2011, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update 2011-05, Presentation of Comprehensive Income. The standard requires entities to have more detailed reporting of comprehensive income. The guidance was effective for us in the first quarter of fiscal 2013 and applied retrospectively. Our adoption of this guidance did not impact our condensed consolidated financial position, results of operations, or cash flows.

- 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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-Subparagraph (SX 210.3A-02)
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-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
-Publisher AICPA
-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.

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-Publisher FASB
-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
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4
-Subparagraph 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 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-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.

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-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.

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-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

- Definition

Disclosure of accounting policy for investments in debt and equity securities that are classified as available-for-sale. This policy also may describe the entity's accounting treatment for transfers between investment categories, how the entity determines whether impairments of available-for-sale securities are other than temporary, and how the fair values of such securities are determined.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196929

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10, 11
-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 SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section M

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 12, 13, 14, 15, 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 SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 2, 12
-Article 5

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 7, 8, 9, 13, 14, 15, 16, 17
-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, 2012

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, 2012								July 31, 2012
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents:
U.S. government and agency securities	$	—	$	87,996	$	—	$	87,996	$	—	$	—	$	—	$	—
Money market funds	11,855		—		—		11,855		250,005		—		—		250,005
Total cash equivalents	11,855		87,996		—		99,851		250,005		—		—		250,005
Short-term investments:
Commercial paper	—		4,986		—		4,986		—		—		—		—
Corporate debt securities	—		18,899		—		18,899		—		—		—		—
U.S. government and agency securities	—		123,199		—		123,199		—		—		—		—
Total short-term investments	—		147,084		—		147,084		—		—		—		—
Long-term investments:
Corporate debt securities	—		13,558		—		13,558		—		—		—		—
U.S. government and agency securities	—		7,009		—		7,009		—		—		—		—
Total long-term investments	—		20,567		—		20,567		—		—		—		—
Other assets:
Restricted cash	1,221		—		—		1,221		1,221		—		—		1,221
Total other assets	1,221		—		—		1,221		1,221		—		—		1,221
Total assets measured at fair value	$	13,076	$	255,647	$	—	$	268,723	$	251,226	$	—	$	—	$	251,226

- 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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-Subparagraph (a,b,bb)
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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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-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, 2012

Investments, Debt and Equity Securities [Abstract]

Schedule of available-for-sale investments

Investments consist of the following (in thousands):



	October 31, 2012
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Commercial paper	$	4,990	$	—	$	(4	)	$	4,986
Corporate debt securities	32,463		18		(24		)	32,457
U.S. government and agency securities	218,221		1		(18		)	218,204
Money market funds	11,855		—		—			11,855
Total investments	$	267,529	$	19	$	(46	)	$	267,502

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

Investments in an unrealized loss position at October 31, 2012 consist of the following (in thousands):



	Less Than 12 Months					12 Months or Greater				Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Commercial paper	$	4,986	$	(4	)	$	—	$	—	$	4,986	$	(4	)
Corporate debt securities	14,541		(24		)	—		—		14,541		(24		)
U.S. government and agency securities	131,606		(18		)	—		—		131,606		(18		)
Total	$	151,133	$	(46	)	$	—	$	—	$	151,133	$	(46	)

Contractual maturities of available-for-sale investments

The amortized cost and fair value of our investments at October 31, 2012, by contractual years-to-maturity, are as follows (in thousands):



	Amortized Cost		Fair Value
Due within one year	$	235,097	$	235,080
Due within one to two years	20,577		20,567
Instruments not due at a single maturity date	11,855		11,855
Total	$	267,529	$	267,502

- 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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Reference 4: 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=6872113&loc=d3e27161-111563

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-Name Accounting Standards Codification
-Topic 320
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-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

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-Name Accounting Standards Codification
-Topic 320
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-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

Commitments and Contingencies (Tables)

3 Months Ended

Oct. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases



	Payments Due by Period
	Total		Less Than 1 Year		1 - 3 Years		3- 5 Years		More Than 5 Years
			(in thousands)
Operating lease obligations	$	107,990	$	4,230	$	20,814	$	22,578	$	60,368
Purchase obligations	19,585		19,585		—		—		—
Total	$	127,575	$	23,815	$	20,814	$	22,578	$	60,368

Equity Award Plans (Tables)

3 Months Ended

Oct. 31, 2012

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, 2012	14,225		$	9.46	8.3	$	678,248
Options granted	—		—
Options forfeited	(217	)	10.09
Options repurchased	—		—
Options exercised	(600	)	2.56
Balance—October 31, 2012	13,408		9.76		8.0	$	606,310
Options vested and expected to vest—October 31, 2012	12,690		$	9.51	7.9	$	577,014
Options exercisable—October 31, 2012	4,513		$	3.45	6.2	$	232,555

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, 2012	—	$	—	—	$	—
RSUs granted	216	65.89
RSUs vested	—	—
RSUs forfeited	—	—
Balance—October 31, 2012	216	$	65.89	2.1	$	11,876
RSUs vested and expected to vest—October 31, 2012	190	$	—	2.0	$	10,446

Summary of Stock Options, Valuation Assumptions

The following table summarizes the assumptions relating to our stock options as follows:



		Three Months Ended October 31, 2011
Risk-free interest rate		0.7%
Expected term		4 years
Volatility		50%
Dividend yield		—%

Schedule of Allocation of Share Based Compensation Expense

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



	Three Months Ended October 31,
	2012		2011
Cost of revenue	$	610	$	107
Research and development	1,690		325
Sales and marketing	4,298		477
General and administrative	1,744		540
Total	$	8,342	$	1,449

- 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, 2012

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,
	2012			2011
Net income (loss) used to compute net income (loss) per share:
Net income (loss)	$	(3,515	)	$	4,116
Less: undistributed earnings allocated to participating securities	—			(4,116		)
Net income (loss) attributable to common stockholders	$	(3,515	)	$	—
Weighted-average shares used to compute net income (loss) per share, basic and diluted	66,813			16,715
Net income (loss) per share attributable to common stockholders, basic and diluted	$	(0.05	)	$	0.00

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



	Three Months Ended October 31,
	2012	2011
Options to purchase common stock	13,408	10,764
RSUs	216	—
Redeemable convertible preferred stock	—	41,084
Warrants to purchase redeemable convertible preferred stock	—	225

Description of Business and Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended
	Oct. 31, 2012	Jul. 31, 2012	Oct. 31, 2012
Description of Business and Summary of Significant Accounting Policies
Proceeds from IPO		$ 219,400
Public offering expenses		$ 4,000
Proceeds from sale of stock in public offering received by existing shareholders	$ 290,304
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
Convertible Preferred Stock
Description of Business and Summary of Significant Accounting Policies
Convertible preferred stock converted into shares of common stock (in shares)		41,305,000
IPO \| Common Stock
Description of Business and Summary of Significant Accounting Policies
Shares of common stock sold in public offering, including existing shares (in shares)		6,200,000
Price per share (in usd per share)		$ 42
Shares of common stock sold to the public (in shares)		4,687,000
Shares of common stock sold in public offering by existing shareholders (in shares)		1,513,000
IPO Overallotment \| Common Stock
Description of Business and Summary of Significant Accounting Policies
Price per share (in usd per share)		$ 42
Shares of common stock sold to the public (in shares)		930,000
Secondary Offering \| Common Stock
Description of Business and Summary of Significant Accounting Policies
Price per share (in usd per share)	$ 63
Shares of common stock sold in public offering by existing shareholders (in shares)	4,800,000

Fair Value Measurements (Details) - USD ($) $ in Thousands	Oct. 31, 2012	Jul. 31, 2012
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Restricted cash	$ 1,221	$ 1,221
Total other assets	1,221	1,221
Total assets measured at fair value	13,076	251,226
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Restricted cash	0	0
Total other assets	0	0
Total assets measured at fair value	255,647	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Restricted cash	0	0
Total other assets	0	0
Total assets measured at fair value	0	0
Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Restricted cash	1,221	1,221
Total other assets	1,221	1,221
Total assets measured at fair value	268,723	251,226
Cash equivalents \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	11,855	250,005
Cash equivalents \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	87,996	0
Cash equivalents \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Cash equivalents \| Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	99,851	250,005
U.S. government and agency securities \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
U.S. government and agency securities \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	87,996	0
U.S. government and agency securities \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
U.S. government and agency securities \| Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	87,996	0
Money market funds \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	11,855	250,005
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
Money market funds \| Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	11,855	250,005
Investments \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Long-term investments	0	0
Investments \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	147,084	0
Long-term investments	20,567	0
Investments \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Long-term investments	0	0
Investments \| Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	147,084	0
Long-term investments	20,567	0
Commercial paper \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Commercial paper \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	4,986	0
Commercial paper \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Commercial paper \| Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	4,986	0
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	18,899	0
Long-term investments	13,558	0
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
Corporate debt securities \| Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	18,899	0
Long-term investments	13,558	0
U.S. government and agency securities \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
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
Short-term investments	123,199	0
Long-term investments	7,009	0
U.S. government and agency securities \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Long-term investments	0	0
U.S. government and agency securities \| Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	123,199	0
Long-term investments	$ 7,009	$ 0

Investments (Available-for-Sale Investments) (Details) $ in Thousands	Oct. 31, 2012 USD ($)
Schedule of Available-for-sale Securities
Amortized Cost	$ 267,529
Unrealized Gains	19
Unrealized Losses	(46)
Estimated Fair Value	267,502
Commercial paper
Schedule of Available-for-sale Securities
Amortized Cost	4,990
Unrealized Gains	0
Unrealized Losses	(4)
Estimated Fair Value	4,986
Corporate debt securities
Schedule of Available-for-sale Securities
Amortized Cost	32,463
Unrealized Gains	18
Unrealized Losses	(24)
Estimated Fair Value	32,457
U.S. government and agency securities
Schedule of Available-for-sale Securities
Amortized Cost	218,221
Unrealized Gains	1
Unrealized Losses	(18)
Estimated Fair Value	218,204
Money market funds
Schedule of Available-for-sale Securities
Amortized Cost	11,855
Unrealized Gains	0
Unrealized Losses	0
Estimated Fair Value	$ 11,855

- Definition

Amount of debt 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 Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-Subparagraph (b)-(g)
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 4: 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 5: 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 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 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.

Reference 7: 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 8: 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 9: 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 10: 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.

+ Details

Investments (Available-for-Sale Investments in Unrealized Loss Position) (Details) $ in Thousands	Oct. 31, 2012 USD ($)
Schedule of Available-for-sale Securities
Less Than 12 Months, Fair Value	$ 151,133
Less than 12 Months, Unrealized Loss	(46)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unreaized Loss	0
Total, Fair Value	151,133
Total, Unrealized Loss	(46)
Commercial paper
Schedule of Available-for-sale Securities
Less Than 12 Months, Fair Value	4,986
Less than 12 Months, Unrealized Loss	(4)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unreaized Loss	0
Total, Fair Value	4,986
Total, Unrealized Loss	(4)
Corporate debt securities
Schedule of Available-for-sale Securities
Less Than 12 Months, Fair Value	14,541
Less than 12 Months, Unrealized Loss	(24)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unreaized Loss	0
Total, Fair Value	14,541
Total, Unrealized Loss	(24)
U.S. government and agency securities
Schedule of Available-for-sale Securities
Less Than 12 Months, Fair Value	131,606
Less than 12 Months, Unrealized Loss	(18)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unreaized Loss	0
Total, Fair Value	131,606
Total, Unrealized Loss	$ (18)

Investments (Available-for-Sale Investments, Contractual Maturities) (Details) $ in Thousands	Oct. 31, 2012 USD ($)
Amortized Cost
Due within one year	$ 235,097
Due within one to two years	20,577
Instruments not due at a single maturity date	11,855
Total	267,529
Fair Value
Due within one year	235,080
Due within one to two years	20,567
Instruments not due at a single maturity date	11,855
Total	$ 267,502

Commitments and Contingencies (Textuals) (Details) $ in Thousands	1 Months Ended
	Sep. 30, 2012 lease_agreement lease_renewal_option	Jan. 31, 2011 USD ($)	Oct. 31, 2012 USD ($)	Sep. 20, 2012 USD ($)
Leases and Litigation
Total payments under the lease agreements			$ 107,990
Loss contingency, settlement agreement, consideration		$ 6,000
Loss contingency, settlement agreement, payment term		3 years
Outstanding balance of loss contingency accrual per the settlement agreement with Fortinet, Inc.			$ 1,250
Santa Clara, California \| Building
Leases and Litigation
Number of lease agreements entered into \| lease_agreement	2
Number of lease renewal options \| lease_renewal_option	2
Lease renewal option, number of years to extend the lease contract	5 years
Total payments under the lease agreements				$ 94,400
Rent holiday included in determining rent expense	7 months

Commitments and Contingencies (Obligations, Fiscal Year Maturity) (Details) $ in Thousands	Oct. 31, 2012 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating lease obligations	$ 107,990
Purchase obligations	19,585
Total	127,575
Operating lease obligations, Less Than 1 Year	4,230
Purchase obligations, Less Than 1 Year	19,585
Less Than 1 Year	23,815
Operating lease obligations, 1-3 Years	20,814
Purchase obligations, 1-3 Years	0
1-3 Years	20,814
Operating lease obligations, 3-5 Years	22,578
Purchase obligations, 3-5 Years	0
3-5 Years	22,578
Operating lease obligations, More Than 5 Years	60,368
Purchase obligations, More Than 5 Years	0
More Than 5 Years	$ 60,368

Equity Award Plans (Stock Options Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 31, 2012	Jul. 31, 2012
Options, Outstanding Roll Forward
Balance, beginning (in shares)	14,225
Options granted (in shares)	0
Options forfeited (in shares)	(217)
Options repurchased (in shares)	0
Options exercised (in shares)	(600)
Balance, ending (in shares)	13,408	14,225
Options, Outstanding, Weighted Average Exercise Price Roll Forward
Balance, beginning (in usd per share)	$ 9.46
Options granted (in usd per share)	0.00
Options forfeited (in usd per share)	10.09
Options repurchased (in usd per share)	0.00
Options exercised (in usd per share)	2.56
Balance, ending (in usd per share)	$ 9.76	$ 9.46
Options, Additional Disclosures
Balance, Weighted-Average Remaining Contractual Life	8 years	8 years 3 months 18 days
Balance, Aggregate Intrinsic Value	$ 606,310	$ 678,248
Options vested and expected to vest, Number of Shares	12,690
Options vested and expected to vest, Weighted-Average Exercise Price	$ 9.51
Options vested and exected to vest, Weighted-Average Remaining Contractual Term	7 years 10 months 24 days
Options vested and expected to vest, Aggregate Intrinsic Value	$ 577,014
Options exercisable, Number of Shares	4,513
Options exercisable, Weighted-Average Exercise Price	$ 3.45
Options exercisable, Weighted-Average Remaining Contractual Term	6 years 2 months 18 days
Optios exercisable, Aggregate Intrinsic Value	$ 232,555

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
	Oct. 31, 2012	Jul. 31, 2012
RSUs, Outstanding Roll Forward
Balance, beginning (in shares)	0
RSUs granted (in shares)	216
RSUs vested (in shares)	0
RSUs forfeited (in shares)	0
Balance, ending (in shares)	216
RSUs, Outstanding, Weighted Average Grant-Date Fair Value Per Share Roll Forward
Balance, beginning (in usd per share)	$ 0.00
RSUs granted (in usd per share)	65.89
RSUs vested (in usd per share)	0.00
RSUs forfeited (in usd per share)	0.00
Balance, ending (in usd per share)	$ 65.89
RSUs, Additional Disclosures
Balance, Weighted-Average Remaining Contractual Term	2 years 1 month 2 days
Balance, Aggregate Intrinsic Value	$ 11,876	$ 0
RSUs vested and expected to vest, Number of Shares	190
RSUs vested and expected to vest, Weighted-Average Grant-Date Fair Value Per Share	$ 0.00
RSUs vested and expected to vest, Weighted-Average Remaining Contractual Term	2 years 11 days
RSUs vested and expected to vest, Aggregate Intrinsic Value	$ 10,446

Equity Award Plans (Stock Options, Valuation Assumptions) (Details) - Stock Options	3 Months Ended
	Oct. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award
Risk-free interest rate	0.70%
Expected Term	4 years
Volatility	50.00%
Dividend yield	0.00%

Equity Award Plans (Allocation of Share Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated share-based compensation expense	$ 8,342	$ 1,449
Total compensation cost not yet recognized, nonvested awards, net of estimated forfeitures	$ 67,242
Total compensation cost, nonvested awards, period for recognition	3 years
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated share-based compensation expense	$ 610	107
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated share-based compensation expense	1,690	325
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated share-based compensation expense	4,298	477
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated share-based compensation expense	1,744	$ 540
Employee Stock Purchase Plan (ESPP)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated share-based compensation expense	1,344
Vice President of Sales \| Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated share-based compensation expense	$ 1,400

Income Taxes (Details)	3 Months Ended
Income Taxes (Details)	Oct. 31, 2012	Oct. 31, 2011
Income Tax Disclosure [Abstract]
Effective income tax rate	(10.00%)	36.00%

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, 2012	Oct. 31, 2011
Earnings Per Share [Abstract]
Net income (loss)	$ (3,515)	$ 4,116
Less: undistributed earnings allocated to participating securities	0	(4,116)
Net income (loss) attributable to common stockholders	$ (3,515)	$ 0
Weighted-average shares used to compute net income (loss) per share, basic and diluted (in shares)	66,813	16,715
Net income (loss) per share attributable to common stockholders, basic and diluted (in usd per share)	$ (0.05)	$ 0.00

- 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, 2012	Oct. 31, 2011
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of net income (loss) per share, amount	13,408	10,764
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of net income (loss) per share, amount	216	0
Redeemable convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of net income (loss) per share, amount	0	41,084
Warrants to purchase redeemable convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of net income (loss) per share, amount	0	225

- 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

Subsequent Events (Details) - Restricted Stock Units (RSUs) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Nov. 30, 2012	Oct. 31, 2012
Subsequent Event
Units granted to employees (in shares)		216,000
Subsequent Event
Subsequent Event
Units granted to employees (in shares)	68,950
Fair value of units granted to employees	$ 3,752
Vesting period	4 years