Infoblox 10-Q 3 Mar 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jan. 31, 2016	Feb. 29, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	INFOBLOX INC
Entity Central Index Key	1,223,862
Current Fiscal Year End Date	--07-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jan. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		57,849,856

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2016	Jul. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 132,804	$ 103,124
Short-term investments	194,427	227,712
Accounts receivable, net	53,883	45,881
Inventory	6,709	8,588
Prepaid expenses and other current assets	11,860	10,459
Total current assets	399,683	395,764
Property and equipment, net	23,212	23,225
Restricted cash	3,518	3,515
Intangible assets, net	1,279	1,923
Goodwill	33,293	33,293
Other assets	1,279	1,547
TOTAL ASSETS	462,264	459,267
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	19,199	19,136
Accrued compensation	19,091	22,931
Deferred revenue, net	108,216	95,130
Total current liabilities	146,506	137,197
Deferred revenue, net	50,924	41,717
Other liabilities	4,687	5,201
TOTAL LIABILITIES	$ 202,117	$ 184,115
Commitments and contingencies (Note 5)
STOCKHOLDERS’ EQUITY:
Convertible preferred stock, $0.0001 par value per share—5,000 shares authorized; no shares issued or outstanding	$ 0	$ 0
Common stock, $0.0001 par value per share—100,000 shares authorized; 58,517 shares and 58,836 shares issued and outstanding as of January 31, 2016 and July 31, 2015	6	6
Additional paid-in capital	446,195	438,725
Accumulated other comprehensive loss	(218)	(37)
Accumulated deficit	(185,836)	(163,542)
TOTAL STOCKHOLDERS’ EQUITY	260,147	275,152
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 462,264	$ 459,267

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jan. 31, 2016	Jul. 31, 2015
Statement of Financial Position [Abstract]
Convertible preferred stock, par value (USD per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	5,000,000	5,000,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0
Common stock, par value (USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	58,517,000	58,836,000
Common stock, shares outstanding	58,517,000	58,836,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Net revenue:
Products and licenses	$ 51,516	$ 37,917	$ 102,373	$ 69,425
Services	44,483	36,387	87,648	71,598
Total net revenue	95,999	74,304	190,021	141,023
Cost of revenue:
Products and licenses	9,856	8,787	20,206	16,254
Services	9,065	7,491	17,817	14,958
Total cost of revenue	18,921	16,278	38,023	31,212
Gross profit	77,078	58,026	151,998	109,811
Operating expenses:
Research and development	17,461	15,504	35,294	30,074
Sales and marketing	45,996	39,788	93,282	78,243
General and administrative	11,149	9,355	21,606	17,315
Total operating expenses	74,606	64,647	150,182	125,632
Income (loss) from operations	2,472	(6,621)	1,816	(15,821)
Other income (expense), net	167	(590)	262	(780)
Income (loss) before provision for (benefit from) income taxes	2,639	(7,211)	2,078	(16,601)
Provision for (benefit from) income taxes	(1,139)	(200)	(189)	620
Net income (loss)	$ 3,778	$ (7,011)	$ 2,267	$ (17,221)
Net loss per share - basic and diluted (USD per share)	$ 0.06	$ (0.13)	$ 0.04	$ (0.31)
Weighted-average shares used in computing basic net income (loss) per share (shares)	58,926	56,087	59,099	55,729
Weighted-average shares used in computing diluted net income (loss) per share (shares)	60,138	56,087	60,795	55,729

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,778	$ (7,011)	$ 2,267	$ (17,221)
Unrealized holding gain (loss) on short-term investments, net	(142)	105	(181)	96
Comprehensive income (loss)	$ 3,636	$ (6,906)	$ 2,086	$ (17,125)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 2,267	$ (17,221)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Stock-based compensation	25,793	24,339
Depreciation and amortization	4,982	4,437
Increase (decrease) in excess tax benefits from employee stock plans	387	(241)
Other	556	1,552
Changes in operating assets and liabilities:
Accounts receivable, net	(8,002)	(2,473)
Inventory	1,778	(1,267)
Prepaid expenses, other current assets and other assets	(930)	(907)
Accounts payable and accrued liabilities	358	553
Accrued compensation	(3,840)	3,247
Deferred revenue, net	22,293	15,239
Other liabilities	(514)	(430)
Net cash provided by operating activities	45,128	26,828
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments	(29,905)	(56,316)
Proceeds from maturities of short-term investments	62,700	40,880
Purchases of property and equipment	(5,144)	(3,299)
Proceeds from sales of short-term investments	0	1,001
Net cash provided by (used in) investing activities	27,651	(17,734)
CASH FLOWS FROM FINANCING ACTIVITIES:
Common stock repurchases	(50,019)	0
Proceeds from issuance of common stock under employee stock plans	7,555	7,633
Increase (decrease) in excess tax benefits from employee stock plans	(387)	241
Net cash provided by (used in) financing activities	(42,851)	7,874
Effect of foreign exchange rate changes on cash and cash equivalents	(248)	(1,269)
NET INCREASE IN CASH AND CASH EQUIVALENTS	29,680	15,699
CASH AND CASH EQUIVALENTS—Beginning of period	103,124	78,535
CASH AND CASH EQUIVALENTS—End of period	132,804	94,234
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Purchases of property and equipment not yet paid	522	378
Cash paid for income taxes, net	$ 439	$ 138

Description of the Business and

Description of the Business and Summary of Significant Accounting Policies	6 Months Ended
	Jan. 31, 2016
Accounting Policies [Abstract]
Description of the Business and Summary of Significant Accounting Policies	DESCRIPTION OF THE BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Business Infoblox Inc. (together with our subsidiaries, “we,” “us” or “our”) was originally incorporated in the State of Illinois in February 1999 and was reincorporated in the State of Delaware in May 2003. We are headquartered in Santa Clara, California and have subsidiaries and representative offices located throughout the world. We provide a broad family of enterprise and service provider-class solutions to automate management of the critical network infrastructure services needed for secure, scalable and fault-tolerant connections between applications, devices and users. Basis of Presentation The condensed consolidated financial statements include our accounts and the accounts of our wholly-owned subsidiaries. Intercompany transactions and balances have been eliminated. The accompanying condensed consolidated balance sheet as of January 31, 2016 and the condensed consolidated statements of operations and the condensed consolidated statements of comprehensive income (loss) for the three and six months ended January 31, 2016 and 2015 and the condensed consolidated statements of cash flows for the six months ended January 31, 2016 and 2015 are unaudited. The condensed consolidated balance sheet as of July 31, 2015 was derived from the audited consolidated balance sheet as of July 31, 2015 . These unaudited condensed consolidated financial statements and accompanying notes should be read together with the audited consolidated financial statements in Item 8 of our Annual Report on Form 10-K for the fiscal year ended July 31, 2015 . The accompanying condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, pursuant to the rules and regulations of the Securities Exchange Commission, or SEC. They do not include all of the financial information and footnotes required by GAAP for complete financial statements. We believe the unaudited condensed consolidated financial statements have been prepared on the same basis as the audited financial statements and include all adjustments necessary for their fair presentation. All adjustments are of a normal recurring nature. The results for the three and six months ended January 31, 2016 are not necessarily indicative of the results to be expected for any subsequent quarter or for the year ending July 31, 2016. Significant Accounting Policies We describe our significant accounting policies in Note 1 to the consolidated financial statements in Item 8 of our Annual Report on Form 10-K for the fiscal year ended July 31, 2015 . Except for the accounting policy related to our market stock units, or MSUs, described below, and the election to allocate the cost related to the repurchase of common stock between additional paid-in-capital and accumulated deficit (see Note 6), there have been no significant changes in our accounting policies during the three and six months ended January 31, 2016 , as compared to the significant accounting policies described in our Annual Report on Form 10-K for the year ended July 31, 2015 . During the first quarter of fiscal 2016, we granted MSUs to certain of our executive officers as part of our executive compensation program. We measure and recognize compensation cost for all stock-based awards based on the awards' fair value. We use the Monte-Carlo simulation model to estimate the fair value of MSUs. As the MSUs contain a performance metric with a market condition (our stock performance relative to a market index), we recognize compensation cost for MSUs using the graded vesting approach, net of estimated forfeitures and do not adjust the expense for subsequent changes in the expected outcome of the market-based vesting conditions. Use of Estimates The preparation of the accompanying condensed consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Those management estimates and assumptions affect revenue recognition, allowances for doubtful accounts and sales returns, valuation of our cash equivalents and available-for-sale investments, valuation of inventory, determination of fair value of stock-based awards, valuation of goodwill and intangible assets acquired, impairment of goodwill and other intangible assets, amortization of intangible assets, contingencies and litigation and accounting for income taxes, including the valuation reserve on deferred tax assets and uncertain tax positions. We evaluate our estimates and assumptions on an ongoing basis using historical experience and other factors and adjust those estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the condensed consolidated financial statements. Concentrations of Risk Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents, short-term investments, restricted cash and accounts receivable. Our cash, cash equivalents, short-term investments and restricted cash are invested in high-credit quality financial instruments with banks and financial institutions. Such deposits may be in excess of insured limits provided on such deposits. We mitigate credit risk in respect to accounts receivable by performing ongoing credit evaluations of our customers and maintaining a reserve for potential credit losses. In addition, we generally require our customers to prepay for maintenance and support services to mitigate the risk of uncollectible accounts receivable. Significant customers are those which represent more than 10% of our total net revenue or total gross accounts receivable balance at each respective balance sheet date. Exclusive Networks, Ltd., a distributor, accounted for 14.2% and 13.3% of our total net revenue for the three and six months ended January 31, 2016 and 10.9% and 11.5% for the three and six months ended January 31, 2015. Exclusive Networks Ltd. and Barclays Services Corporation, an end-user customer, accounted for 13.9% and 10.7% of our total gross accounts receivable as of January 31, 2016 . Exclusive Networks Ltd. accounted for 14.0% of our total gross accounts receivable as of July 31, 2015 . We believe it is unlikely that the loss of any of our channel partners would have a long term material adverse effect on our total net revenue as we believe end-users would likely purchase our products from a different channel partner. However, a loss of any one of these channel partners could have a material adverse impact during the transition period. Recently Issued Accounting Pronouncements In November 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-17 “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes ,” to simplify the presentation of deferred income taxes. Under this new standard, both deferred tax liabilities and assets are required to be classified as noncurrent in a classified balance sheet. ASU 2015-17 is effective for fiscal years, and the interim periods within those years, beginning after December 15, 2016. Early adoption is permitted, and we are in the process of evaluating the timing of the adoption. Should we not early adopt, this standard will be effective for us in fiscal year 2018. The adoption of this standard is not expected to have a significant impact on our condensed consolidated financial statements. In July 2015, the FASB issued ASU 2015-11— Inventory—Simplifying the Measurement of Inventory (Topic 330) . ASU 2015-11 changes the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value. It applies to entities that measure inventory using a method other than last-in, first-out or the retail inventory method. The amendments apply to all other inventory, which includes inventory that is measured using first-in, first-out (FIFO) or average cost. Early adoption is permitted, and we are in the process of evaluating the timing of the adoption. Should we not early adopt, this standard will be effective for us in fiscal year 2018. The adoption of this standard is not expected to have a significant impact on our condensed consolidated financial statements. In April 2015, the FASB issued ASU No. 2015-05, Intangibles-Goodwill and Other-Internal-Use Software: Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement , which provides guidance on determining whether a cloud computing arrangement contains a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. We adopted this standard during the three months ended October 31, 2015 and our adoption did not have a significant impact on our condensed consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) , which supersedes the revenue recognition requirements in Accounting Standards Codification (ASC) 605, Revenue Recognition. This ASU is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. The guidance requires the use of either of two methods: (i) retrospective to each prior reporting period presented with the option to elect certain practical expedients as defined within the guidance; or (ii) retrospective with the cumulative effect of initially applying the guidance recognized at the date of initial application and providing certain additional disclosures as defined per the guidance. In July 2015, the FASB decided to delay the effective date of the new revenue standard by one year. As such, ASU 2014-09 will be effective for us in fiscal year 2019, with the option to adopt earlier in fiscal year 2018. We are currently evaluating adoption timing and methods and whether this standard will have a material impact on our condensed consolidated financial statements.

Net Income (Loss) Per Share

Net Income (Loss) Per Share	6 Months Ended
	Jan. 31, 2016
Earnings Per Share [Abstract]
Net Income (Loss) Per Share	NET INCOME (LOSS) PER SHARE We compute basic net income (loss) per share using the weighted average number of common shares outstanding during the period. We compute diluted net income (loss) per share using the weighted average number of common shares and dilutive potential common shares outstanding during the period. Dilutive potential common shares include shares issuable upon the exercise of stock options and upon the vesting of restricted stock units, or RSUs, and each purchase under our employee stock purchase plan, or ESPP, under the treasury stock method. In loss periods, basic net loss per share and diluted net loss per share are the same since the effect of potential common shares is anti-dilutive and therefore excluded. The following outstanding weighted-average shares of common stock equivalents were excluded from the computation of diluted net income (loss) per share for the periods presented because including them would have been antidilutive: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 (In thousands) Stock options to purchase common stock 1,743 3,412 1,632 3,221 Restricted stock units 1,488 1,946 1,355 2,229 Employee Stock Purchase Plan 171 58 164 260

Cash Equivalents, Short-Term In

Cash Equivalents, Short-Term Investments, Restricted Cash and Fair Value Measurements	6 Months Ended
	Jan. 31, 2016
Financial Instruments, Owned, at Fair Value [Abstract]
Cash Equivalents, Short-term Investments, Restricted Cash and Fair Value Measurements	CASH EQUIVALENTS, SHORT-TERM INVESTMENTS, RESTRICTED CASH AND FAIR VALUE MEASUREMENTS Cash Equivalents, Short-term Investments and Restricted Cash The following table summarizes our cash equivalents, short-term investments and restricted cash as of January 31, 2016 : Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (In thousands) Cash equivalents: Money market funds $ 18,004 $ — $ — $ 18,004 Short-term investments: U.S. Treasury securities 135,602 — (156 ) 135,446 U.S. government agency securities 37,439 4 (27 ) 37,416 FDIC-backed certificates of deposit 21,600 3 (38 ) 21,565 Total short-term investments 194,641 7 (221 ) 194,427 Restricted cash: U.S. Treasury securities 3,420 — (4 ) 3,416 Total cash equivalents, short-term investments and restricted cash $ 216,065 $ 7 $ (225 ) $ 215,847 The following table presents the contractual maturities of our short-term investments which are classified as available-for-sale securities as of January 31, 2016 : Amortized Cost Estimated Fair Value (In thousands) Due within one year $ 123,035 $ 122,933 Due after one year through two years 71,606 71,494 Total $ 194,641 $ 194,427 We classify our available-for-sale investments as short-term investments in our condensed consolidated balance sheet based on the availability of the funds for use in operations or strategic investments rather than the actual maturity dates. The following table summarizes our cash equivalents, short-term investments and restricted cash as of July 31, 2015: Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (In thousands) Cash equivalents: Money market funds $ 5,695 $ — $ — $ 5,695 Short-term investments: U.S. Treasury securities 162,718 50 (58 ) 162,710 U.S. government agency securities 42,468 9 (10 ) 42,467 FDIC-backed certificates of deposit 22,560 7 (32 ) 22,535 Total short-term investments 227,746 66 (100 ) 227,712 Restricted cash: U.S. Treasury securities 3,416 1 (4 ) 3,413 Total cash equivalents, short-term investments and restricted cash $ 236,857 $ 67 $ (104 ) $ 236,820 Fair Value Measurements The following table sets forth the fair value of our financial assets by level within the fair value hierarchy: Fair Value Measurements at January 31, 2016 Using: Quoted Prices in Active Markets For Identical Assets Significant Other Observable Remaining Inputs Significant Other Unobservable Remaining Inputs (Level I) (Level II) (Level III) Total (In thousands) Financial Assets Cash equivalents: Money market funds $ 18,004 $ — $ — $ 18,004 Short-term investments: U.S. Treasury securities 135,446 — — 135,446 U.S. government agency securities — 37,416 — 37,416 FDIC-backed certificates of deposit — 21,565 — 21,565 Total short-term investments 135,446 58,981 — 194,427 Restricted cash: U.S. Treasury securities 3,416 — — 3,416 Total financial assets $ 156,866 $ 58,981 $ — $ 215,847 Fair Value Measurements at July 31, 2015 Using: Quoted Prices in Active Markets For Identical Assets Significant Other Observable Remaining Inputs Significant Other Unobservable Remaining Inputs (Level I) (Level II) (Level III) Total (In thousands) Financial Assets Cash equivalents: Money market funds $ 5,695 $ — $ — $ 5,695 Short-term investments: U.S. Treasury securities 162,710 — — 162,710 U.S. government agency securities — 42,467 — 42,467 FDIC-backed certificates of deposit — 22,535 — 22,535 Total short-term investments 162,710 65,002 — 227,712 Restricted cash: U.S. Treasury securities 3,413 — — 3,413 Total financial assets $ 171,818 $ 65,002 $ — $ 236,820 We value our Level I assets, consisting of money market funds and U.S. Treasury securities, using quoted prices in active markets for identical instruments. Financial assets whose fair values we measure on a recurring basis using Level II inputs consist of U.S. government agency securities and Federal Deposit Insurance Corporation, or FDIC-backed certificates of deposit. We measure the fair values of these assets with the help of a pricing service that either provides quoted market prices in active markets for identical or similar securities or uses observable inputs for their pricing without applying significant adjustments because the inputs used in the valuation model, such as interest rates and volatility, can be corroborated by readily observable market data for substantially the full term of the financial assets. There were no transfers between Level I, Level II and Level III fair value hierarchies during the three and six months ended January 31, 2016 .

Inventory and Deferred Revenue

Inventory and Deferred Revenue	6 Months Ended
	Jan. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Inventory and Deferred Revenue	INVENTORY AND DEFERRED REVENUE Inventory Inventory consists of the following: January 31, 2016 July 31, 2015 (In thousands) Raw materials $ 1,825 $ 2,224 Finished goods 4,884 6,364 Total inventory $ 6,709 $ 8,588 Deferred Revenue, Net Deferred revenue, net consists of the following: January 31, 2016 July 31, 2015 (In thousands) Deferred revenue: Products and licenses $ 8,314 $ 6,255 Services 155,130 133,834 Total deferred revenue 163,444 140,089 Deferred cost of revenue: Products and licenses 487 567 Services 3,817 2,675 Total deferred cost of revenue 4,304 3,242 Total deferred revenue, net 159,140 136,847 Less current portion 108,216 95,130 Non-current portion $ 50,924 $ 41,717

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jan. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Contract Manufacturer Commitments The independent contract manufacturer that provides the substantial majority of our manufacturing, repair and supply chain operations procures components and builds 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 marketing organizations, adjusted for overall market conditions. In order to reduce manufacturing lead times and plan for adequate component supply, we may issue purchase orders to this independent contract manufacturer which may not be cancelable. In addition, we also have purchase commitments with other third-party contract manufacturers and suppliers. As of January 31, 2016 , we had $7.5 million in purchase commitments with our third-party contract manufacturers and suppliers, of which $6.5 million relates to open purchase orders with our primary independent contract manufacturer. Guarantees We have entered into agreements with some of our customers that contain indemnification provisions relating to potential situations where claims could be alleged that our products infringe the intellectual property rights of a third party. We have, at our option and expense, the ability to repair any infringement, replace the product with a non-infringing functionally equivalent product, or refund our customers the unamortized value of the product based on its estimated useful life, typically five years . Other guarantees or indemnification arrangements include guarantees of product and service performance and standby letters of credit for lease facilities and corporate credit cards. We have not recorded a liability related to these indemnification and guarantee provisions, and our guarantees and indemnification arrangements have not had any significant impact on our condensed consolidated financial statements to date. Loss Contingencies and Legal Proceedings We are subject to the possibility of various loss contingencies arising in the ordinary course of business. An estimated loss contingency is accrued when it is probable that an asset has been impaired or a liability has been incurred and the range of loss can be reasonably estimated. However, the actual loss in any such contingency may be materially different from our estimates, which could result in the need to record additional expenses. If the amount of liability is not probable or the amount cannot be reasonably estimated, no accruals have been made. We regularly evaluate current information available to management to determine whether such accruals should be adjusted and whether new accruals are required in the periods presented. From time to time, we are subject to various legal proceedings, claims and litigation arising in the ordinary course of business. Other than the litigation matter described below, as to which we are unable to make a materiality determination, we do not believe we are party to any currently pending legal proceedings, the outcome of which would have a material adverse effect on our financial position, results of operations or cash flows. There can be no assurance that existing or future legal proceedings arising in the ordinary course of business or otherwise will not have a material adverse effect on our financial position, results of operations or cash flows. On June 9, 2015, Stacey Greenfield, who claims to be a stockholder of the Company, filed suit in the United States District Court for the Southern District of New York under Section 16(b) of the Securities Exchange Act of 1934 (“Section 16”) against Cadian Capital Management, LP, and certain persons and entities allegedly affiliated with it (collectively, the “Cadian Defendants”) in an action captioned Greenfield v. Cadian Capital Management, L.P., et al., Case No. 15-civ-04478. We are named as a nominal defendant. Plaintiff alleges that the Cadian Defendants engaged in transactions in our securities that resulted in “short-swing” profits within the scope of Section 16, and seeks disgorgement from the Cadian Defendants of those alleged “short-swing” profits on our behalf. On September 3, 2015, the Cadian Defendants filed a motion to dismiss the complaint. On October 7, 2015, Plaintiff filed an amended complaint (“Amended Complaint”). On December 11, 2015, the Cadian Defendants filed a motion to dismiss the Amended Complaint, which Plaintiff has since opposed. The motion to dismiss has been fully briefed but has not been ruled upon by the Court. The parties have agreed that we (as a nominal defendant) shall not be required to file any responsive pleading until after the Cadian Defendants’ motion to dismiss is decided. We believe at this time that liabilities associated with this case, while possible, are not probable, and therefore we have not recorded any accrual for them as of January 31, 2016 and July 31, 2015 . Further, any possible range of loss cannot be reasonably estimated at this time.

Stockholders_ Equity and Employ

Stockholders’ Equity and Employee Benefit Plans	6 Months Ended
	Jan. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stockholders' Equity and Employee Benefit Plans	STOCKHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS Stock-based Compensation The following table summarizes stock-based compensation expense for stock option grants, ESPP purchase rights, restricted stock units, or RSUs, and MSUs recorded in our condensed consolidated statements of operations: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 (In thousands) Cost of revenue $ 1,221 $ 1,201 $ 2,349 $ 2,404 Research and development 2,908 2,633 6,125 5,241 Sales and marketing 6,343 5,847 12,561 12,195 General and administrative 2,493 2,436 4,758 4,499 $ 12,965 $ 12,117 $ 25,793 $ 24,339 The following table summarizes stock-based compensation expense by award type: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 (In thousands) RSUs $ 9,494 $ 7,846 $ 19,315 $ 15,284 Stock options 1,601 2,448 3,166 5,154 ESPP 1,284 1,823 2,416 3,901 MSUs 586 — 896 — $ 12,965 $ 12,117 $ 25,793 $ 24,339 The following table summarizes the unrecognized stock-based compensation balance, net of estimated forfeitures, by type of awards as of January 31, 2016 : As of January 31, 2016 Weighted-Average Amortization Period (In thousands) (In years) RSUs $ 71,705 2.64 Stock options 7,974 2.28 ESPP 4,106 1.05 MSUs 3,503 1.50 Total unrecognized stock-based compensation balance $ 87,288 2.49 Determination of Fair Value The fair value of stock option grants and ESPP purchase rights was estimated at the date of grant and start of the offering period using the following assumptions: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 Stock Options: Expected term (in years) 6.08 6.08 6.08 6.08 Risk-free interest rate 1.70 % 1.73 % 1.70 % 1.80 % Expected volatility 52 % 55 % 52 % 56 % Dividend rate — % — % — % — % Weighted average fair value per share $ 9.24 $ 9.40 $ 9.48 $ 8.66 Employee Stock Purchase Plan: Expected term (in years) 0.50-2.00 0.50-2.00 0.50 - 2.00 0.50 - 2.00 Risk-free interest rate 0.51%-0.96% 0.16%-0.71% 0.51% - 0.96% 0.16% - 0.71% Expected volatility 64 % 71 % 64 % 71 % Dividend rate — % — % — % — % Weighted average fair value per share $6.19-$9.44 $7.02-$10.72 $6.19 - $9.44 $7.02-$10.72 Stock Option Activity A summary of the stock option activity under our stock plans during the six months ended January 31, 2016 is presented below: Number of Shares Underlying Outstanding Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value (In thousands) (In years) (In thousands) Outstanding as of July 31, 2015 3,357 $ 15.45 6.67 $ 32,040 Granted 74 18.76 Exercised (425 ) 7.91 Canceled due to forfeitures and expirations (134 ) 20.62 Outstanding as of January 31, 2016 2,872 16.40 6.27 9,785 Vested and expected to vest as of January 31, 2016 2,787 16.27 6.20 9,747 Vested and exercisable as of January 31, 2016 1,965 $ 14.60 5.32 $ 9,153 Restricted Stock Unit Activity A summary of the RSU activity during the six months ended January 31, 2016 is presented below: Number of Units Weighted-Average Grant Date Fair Value Per Share (In thousands) Outstanding as of July 31, 2015 4,406 $ 21.03 Granted 2,014 18.13 Vested (1,104 ) 19.45 Cancellations due to forfeitures (457 ) 19.93 Outstanding as of January 31, 2016 4,859 $ 20.29 Market Stock Units In September 2015, the Compensation Committee of our board of directors approved awarding MSUs to certain of our officers. In general, the target shares are eligible to be earned in three annual installments, based on the number of shares eligible to be earned for the applicable performance period multiplied by the Performance Multiplier (as defined below) in effect for the applicable performance period. The performance periods consist of a one-, two- and three-year period within the three-year period covering fiscal 2016, fiscal 2017 and fiscal 2018, with each performance period commencing on the first day of fiscal 2016. In each of the first two performance periods, up to one-third of the target shares are eligible to be earned. In the third performance period, up to the maximum shares ( 175% of target shares) less any shares that were earned in a prior performance period are eligible to be earned. The performance goal under the MSUs is our total stockholder return relative to the Russell 2000 Index over the applicable performance period. The Performance Multiplier is based on the positive difference or negative difference, measured in percentage points, between our total stockholder return and the total return for the Russell 2000 Index over the applicable performance period, and ranges from 0% to 175% . Subject to certain exceptions, the MSUs shall vest, if at all, only following the end of each applicable performance period, and the officer must be employed by us at the end of such performance period in order to vest in the award. We use a Monte-Carlo simulation to calculate the fair value of the award on the grant date. Monte-Carlo simulation requires various assumptions including stock price volatility and risk free interest rate as of the valuation date corresponding to the length of time remaining in the performance period and expected dividend yield. In September 2015, we granted a total of 245,000 MSUs with a weighted-average grant date fair value per unit of $20.66 . We recognized $0.6 million and $0.9 million stock-based compensation expense, net of estimated forfeitures, related to MSUs during the three and six months ended January 31, 2016 . As of January 31, 2016 , there was approximately $3.5 million of unrecognized compensation cost, net of estimated forfeitures, related to MSUs. No MSUs vested during the three and six months ended January 31, 2016 as the first performance period would not be completed until the end of fiscal 2016. No MSUs were forfeited or canceled during the three and six months ended January 31, 2016 . Share Repurchase Program In November 2015, our board of directors authorized a $100 million share repurchase program, with $50 million of that program to be executed as an accelerated share repurchase, or ASR, and the remaining $50 million of that program may be executed from time to time in compliance with applicable securities laws in the open market or in privately-negotiated transactions. The timing and amounts of any repurchases will be based on market conditions and other factors including price, regulatory requirements and capital availability. The authorization for open market purchases does not require the purchase of any minimum number of shares, has no expiration date and may be suspended, modified or discontinued at any time without prior notice. Under this program, shares repurchased are recorded as a reduction to capital in excess of par value and an increase in accumulated deficit in our condensed consolidated balance sheet as of January 31, 2016. In December 2015, we executed an ASR with Goldman, Sachs & Co., or GS&Co, pursuant to which, on December 8, 2015, we paid GS&Co $50 million and received an initial delivery of 2,192,982 shares, representing 80% of the total ASR amount. Upon final settlement of the ASR, GS&Co may be required to deliver additional shares of common stock to us or we may be required to deliver shares of our common stock, or elect to make a cash payment, to GS&Co, based on the terms and conditions of the ASR. We have accounted for the ASR program as two separate transactions (i) the 2,192,982 shares of common stock initially delivered to us on December 8, 2015 pursuant to the ASR were accounted for as a share repurchase transaction resulting in a reduction of stockholders’ equity and (ii) the unsettled contract representing 20% , or $10 million , of the total ASR were accounted for as a forward contract indexed to our own common stock. The initial delivery of 2,192,982 shares on December 8, 2015 resulted in an immediate reduction, on the delivery date, of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted earnings per share. We have determined that the forward contract, indexed to our common stock met all of the applicable criteria for equity classification. Therefore, during the three and six months ended January 31, 2016, we recorded $40 million as a share repurchase transaction and recorded $10 million , the implied value of the forward contract, as additional paid-in-capital. In February 2016, the ASR was completed and GS&Co delivered 748,464 additional shares to us, resulting in a total of 2,941,446 shares repurchased at an average per share price of $17.00 . We will account for the additional 748,464 shares repurchased as a share repurchase transaction which will reduce outstanding shares and the weighted shares outstanding that will be used to calculate the basic and diluted net income (loss) per share for the three and nine months ending April 30, 2016. In addition, approximately $4.7 million of the cost associated with these additional shares, which was initially recorded as a reduction to additional paid-in-capital, will be reclassified to accumulated deficit during the three and nine months ending April 30, 2016.

Income Taxes

Income Taxes	6 Months Ended
	Jan. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The income tax benefits for the three months ended January 31, 2016 and 2015 were $1.1 million and $0.2 million and the amounts recorded in each period consisted of the federal and state income tax benefits, partially offset by foreign income taxes. For the three months ended January 31, 2016 and 2015, our income tax benefits differed from the statutory amount primarily due to U.S. and foreign taxes currently payable as we realized no benefit for current year losses due to maintaining a full valuation allowance against net U.S. deferred tax assets. For the three months ended January 31, 2016, we also maintained a full valuation allowance against net Canadian deferred tax assets. The income tax benefit for the six months ended January 31, 2016 was $0.2 million and the provision for income taxes for the six months ended January 31, 2015 was $0.6 million . The income tax benefit for the six months ended January 31, 2016 primarily consisted of U.S. income tax benefits and foreign income tax and the provision for income taxes for the six months ended January 31, 2015 primarily consisted of state and foreign income taxes. The change in the income tax benefit for the six months ended January 31, 2016 compared to the same period in the prior year was primarily due to higher favorable adjustments to U.S. taxes recorded in the first fiscal quarter of 2016 as a result of higher projected fiscal year 2016 taxable income. The realization of tax benefits of deferred tax assets is dependent upon future levels of taxable income, of an appropriate character, in the periods the items are expected to be deductible or taxable. Based on the available objective evidence, management does not believe it is more likely than not that the net U.S. and Canadian deferred tax assets will be realizable. Accordingly, we have provided a full valuation allowance against net U.S. and Canadian deferred tax assets as of January 31, 2016 and July 31, 2015. We intend to maintain the valuation allowance until sufficient positive evidence exists to support a reversal of, or decrease in, the valuation allowance. During the three and six months ended January 31, 2016, there have been no material changes to the total amount of unrecognized tax benefits. The Protecting Americans from Tax Hikes Act of 2015, or the PATH Act, which made the research tax credit permanent, was passed on December 18, 2015. The PATH Act retroactively extended the federal research tax credit from January 1, 2015. As we have a full valuation allowance against net U.S. deferred tax asset, this provision has no material impact on our financial statements for the three and six months ended January 31, 2016.

Segment Information

Segment Information	6 Months Ended
	Jan. 31, 2016
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION We operate in one segment. The following table represents net revenue based on the customer’s location, as determined by the customer’s shipping address: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 (In thousands) Americas $ 58,671 $ 46,578 $ 119,997 $ 91,428 Europe, Middle East and Africa ("EMEA") 27,232 19,228 51,224 35,125 Asia Pacific ("APAC") 10,096 8,498 18,800 14,470 Total net revenue $ 95,999 $ 74,304 $ 190,021 $ 141,023 Included within the Americas total in the above table is revenue from sales in the United States of $56.1 million and $44.1 million for the three months ended January 31, 2016 and 2015 and $113.9 million and $86.3 million for the six months ended January 31, 2016 and 2015 . No other country comprised more than 10% of our net revenue for the three and six months ended January 31, 2016 and 2015 . Our property and equipment, net by location is summarized as follows: January 31, 2016 July 31, 2015 (In thousands) Americas $ 21,506 $ 21,807 EMEA 609 712 APAC 1,097 706 Total property and equipment, net $ 23,212 $ 23,225 Included within the Americas total in the above table is property and equipment, net in the United States of $21.4 million and $21.8 million as of January 31, 2016 and July 31, 2015 .

Subsequent Events

Subsequent Events	6 Months Ended
	Jan. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Business Acquisition On February 6, 2016, we entered into an Agreement and Plan of Merger (the “Merger Agreement”) with IID Security, Inc., a Delaware corporation (“IID”), Niners Acquisition Sub, Inc. and Shareholder Representative Services, LLC to acquire IID, a provider of global threat intelligence. On February 8, 2016, we consummated the acquisition of IID pursuant to the Merger Agreement (the “Acquisition”) and IID became our wholly owned subsidiary. Pursuant to the terms of the Merger Agreement, all outstanding shares of IID capital stock and vested options or warrants to purchase IID capital stock were canceled in exchange for an aggregate of $45 million in cash, subject to certain adjustments. A portion of the aggregate consideration is subject to deferred payment arrangements and holdback provisions related to the indemnification obligations of IID security holders. The Merger Agreement contains customary representations, warranties and covenants by us and IID. Share Repurchase Program In February 2016, the ASR was completed and GS&Co delivered 748,464 additional shares to us, resulting in a total of 2,941,446 shares repurchased at an average per share price of $17.00 . We will account for the additional 748,464 shares repurchased as a share repurchase transaction which will reduce outstanding shares and the weighted shares outstanding that will be used to calculate the basic and diluted net income (loss) per share for the three and nine months ending April 30, 2016. In addition, approximately $4.7 million of the cost associated with these additional shares, which was initially recorded as a reduction to additional paid-in-capital, will be reclassified to accumulated deficit during the three and nine months ending April 30, 2016.

Description of the Business a16

Description of the Business and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jan. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The condensed consolidated financial statements include our accounts and the accounts of our wholly-owned subsidiaries. Intercompany transactions and balances have been eliminated. The accompanying condensed consolidated balance sheet as of January 31, 2016 and the condensed consolidated statements of operations and the condensed consolidated statements of comprehensive income (loss) for the three and six months ended January 31, 2016 and 2015 and the condensed consolidated statements of cash flows for the six months ended January 31, 2016 and 2015 are unaudited. The condensed consolidated balance sheet as of July 31, 2015 was derived from the audited consolidated balance sheet as of July 31, 2015 . These unaudited condensed consolidated financial statements and accompanying notes should be read together with the audited consolidated financial statements in Item 8 of our Annual Report on Form 10-K for the fiscal year ended July 31, 2015 . The accompanying condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, pursuant to the rules and regulations of the Securities Exchange Commission, or SEC. They do not include all of the financial information and footnotes required by GAAP for complete financial statements. We believe the unaudited condensed consolidated financial statements have been prepared on the same basis as the audited financial statements and include all adjustments necessary for their fair presentation. All adjustments are of a normal recurring nature. The results for the three and six months ended January 31, 2016 are not necessarily indicative of the results to be expected for any subsequent quarter or for the year ending July 31, 2016.
Use of Estimates	Use of Estimates The preparation of the accompanying condensed consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Those management estimates and assumptions affect revenue recognition, allowances for doubtful accounts and sales returns, valuation of our cash equivalents and available-for-sale investments, valuation of inventory, determination of fair value of stock-based awards, valuation of goodwill and intangible assets acquired, impairment of goodwill and other intangible assets, amortization of intangible assets, contingencies and litigation and accounting for income taxes, including the valuation reserve on deferred tax assets and uncertain tax positions. We evaluate our estimates and assumptions on an ongoing basis using historical experience and other factors and adjust those estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the condensed consolidated financial statements.
Concentrations of Risk	Concentrations of Risk Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents, short-term investments, restricted cash and accounts receivable. Our cash, cash equivalents, short-term investments and restricted cash are invested in high-credit quality financial instruments with banks and financial institutions. Such deposits may be in excess of insured limits provided on such deposits. We mitigate credit risk in respect to accounts receivable by performing ongoing credit evaluations of our customers and maintaining a reserve for potential credit losses. In addition, we generally require our customers to prepay for maintenance and support services to mitigate the risk of uncollectible accounts receivable. Significant customers are those which represent more than 10% of our total net revenue or total gross accounts receivable balance at each respective balance sheet date. Exclusive Networks, Ltd., a distributor, accounted for 14.2% and 13.3% of our total net revenue for the three and six months ended January 31, 2016 and 10.9% and 11.5% for the three and six months ended January 31, 2015. Exclusive Networks Ltd. and Barclays Services Corporation, an end-user customer, accounted for 13.9% and 10.7% of our total gross accounts receivable as of January 31, 2016 . Exclusive Networks Ltd. accounted for 14.0% of our total gross accounts receivable as of July 31, 2015 . We believe it is unlikely that the loss of any of our channel partners would have a long term material adverse effect on our total net revenue as we believe end-users would likely purchase our products from a different channel partner. However, a loss of any one of these channel partners could have a material adverse impact during the transition period.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In November 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-17 “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes ,” to simplify the presentation of deferred income taxes. Under this new standard, both deferred tax liabilities and assets are required to be classified as noncurrent in a classified balance sheet. ASU 2015-17 is effective for fiscal years, and the interim periods within those years, beginning after December 15, 2016. Early adoption is permitted, and we are in the process of evaluating the timing of the adoption. Should we not early adopt, this standard will be effective for us in fiscal year 2018. The adoption of this standard is not expected to have a significant impact on our condensed consolidated financial statements. In July 2015, the FASB issued ASU 2015-11— Inventory—Simplifying the Measurement of Inventory (Topic 330) . ASU 2015-11 changes the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value. It applies to entities that measure inventory using a method other than last-in, first-out or the retail inventory method. The amendments apply to all other inventory, which includes inventory that is measured using first-in, first-out (FIFO) or average cost. Early adoption is permitted, and we are in the process of evaluating the timing of the adoption. Should we not early adopt, this standard will be effective for us in fiscal year 2018. The adoption of this standard is not expected to have a significant impact on our condensed consolidated financial statements. In April 2015, the FASB issued ASU No. 2015-05, Intangibles-Goodwill and Other-Internal-Use Software: Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement , which provides guidance on determining whether a cloud computing arrangement contains a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. We adopted this standard during the three months ended October 31, 2015 and our adoption did not have a significant impact on our condensed consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) , which supersedes the revenue recognition requirements in Accounting Standards Codification (ASC) 605, Revenue Recognition. This ASU is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. The guidance requires the use of either of two methods: (i) retrospective to each prior reporting period presented with the option to elect certain practical expedients as defined within the guidance; or (ii) retrospective with the cumulative effect of initially applying the guidance recognized at the date of initial application and providing certain additional disclosures as defined per the guidance. In July 2015, the FASB decided to delay the effective date of the new revenue standard by one year. As such, ASU 2014-09 will be effective for us in fiscal year 2019, with the option to adopt earlier in fiscal year 2018. We are currently evaluating adoption timing and methods and whether this standard will have a material impact on our condensed consolidated financial statements.

Net Income (Loss) Per Share (Ta

Net Income (Loss) Per Share (Tables)	6 Months Ended
	Jan. 31, 2016
Earnings Per Share [Abstract]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The following outstanding weighted-average shares of common stock equivalents were excluded from the computation of diluted net income (loss) per share for the periods presented because including them would have been antidilutive: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 (In thousands) Stock options to purchase common stock 1,743 3,412 1,632 3,221 Restricted stock units 1,488 1,946 1,355 2,229 Employee Stock Purchase Plan 171 58 164 260

Cash Equivalents, Short-Term 18

Cash Equivalents, Short-Term Investments, Restricted Cash and Fair Value Measurements (Tables)	6 Months Ended
	Jan. 31, 2016
Financial Instruments, Owned, at Fair Value [Abstract]
Schedule Cash Equivalents, Short-term Investments and Restricted Cash	The following table summarizes our cash equivalents, short-term investments and restricted cash as of July 31, 2015: Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (In thousands) Cash equivalents: Money market funds $ 5,695 $ — $ — $ 5,695 Short-term investments: U.S. Treasury securities 162,718 50 (58 ) 162,710 U.S. government agency securities 42,468 9 (10 ) 42,467 FDIC-backed certificates of deposit 22,560 7 (32 ) 22,535 Total short-term investments 227,746 66 (100 ) 227,712 Restricted cash: U.S. Treasury securities 3,416 1 (4 ) 3,413 Total cash equivalents, short-term investments and restricted cash $ 236,857 $ 67 $ (104 ) $ 236,820 The following table summarizes our cash equivalents, short-term investments and restricted cash as of January 31, 2016 : Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (In thousands) Cash equivalents: Money market funds $ 18,004 $ — $ — $ 18,004 Short-term investments: U.S. Treasury securities 135,602 — (156 ) 135,446 U.S. government agency securities 37,439 4 (27 ) 37,416 FDIC-backed certificates of deposit 21,600 3 (38 ) 21,565 Total short-term investments 194,641 7 (221 ) 194,427 Restricted cash: U.S. Treasury securities 3,420 — (4 ) 3,416 Total cash equivalents, short-term investments and restricted cash $ 216,065 $ 7 $ (225 ) $ 215,847
Investments Classified by Contractual Maturity Date	The following table presents the contractual maturities of our short-term investments which are classified as available-for-sale securities as of January 31, 2016 : Amortized Cost Estimated Fair Value (In thousands) Due within one year $ 123,035 $ 122,933 Due after one year through two years 71,606 71,494 Total $ 194,641 $ 194,427
Schedule of Fair Value of Assets and Liabilities by Level	The following table sets forth the fair value of our financial assets by level within the fair value hierarchy: Fair Value Measurements at January 31, 2016 Using: Quoted Prices in Active Markets For Identical Assets Significant Other Observable Remaining Inputs Significant Other Unobservable Remaining Inputs (Level I) (Level II) (Level III) Total (In thousands) Financial Assets Cash equivalents: Money market funds $ 18,004 $ — $ — $ 18,004 Short-term investments: U.S. Treasury securities 135,446 — — 135,446 U.S. government agency securities — 37,416 — 37,416 FDIC-backed certificates of deposit — 21,565 — 21,565 Total short-term investments 135,446 58,981 — 194,427 Restricted cash: U.S. Treasury securities 3,416 — — 3,416 Total financial assets $ 156,866 $ 58,981 $ — $ 215,847 Fair Value Measurements at July 31, 2015 Using: Quoted Prices in Active Markets For Identical Assets Significant Other Observable Remaining Inputs Significant Other Unobservable Remaining Inputs (Level I) (Level II) (Level III) Total (In thousands) Financial Assets Cash equivalents: Money market funds $ 5,695 $ — $ — $ 5,695 Short-term investments: U.S. Treasury securities 162,710 — — 162,710 U.S. government agency securities — 42,467 — 42,467 FDIC-backed certificates of deposit — 22,535 — 22,535 Total short-term investments 162,710 65,002 — 227,712 Restricted cash: U.S. Treasury securities 3,413 — — 3,413 Total financial assets $ 171,818 $ 65,002 $ — $ 236,820

Inventory and Deferred Revenue

Inventory and Deferred Revenue (Tables)	6 Months Ended
	Jan. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Inventory	Inventory consists of the following: January 31, 2016 July 31, 2015 (In thousands) Raw materials $ 1,825 $ 2,224 Finished goods 4,884 6,364 Total inventory $ 6,709 $ 8,588
Schedule of Deferred Revenue, Net	Deferred revenue, net consists of the following: January 31, 2016 July 31, 2015 (In thousands) Deferred revenue: Products and licenses $ 8,314 $ 6,255 Services 155,130 133,834 Total deferred revenue 163,444 140,089 Deferred cost of revenue: Products and licenses 487 567 Services 3,817 2,675 Total deferred cost of revenue 4,304 3,242 Total deferred revenue, net 159,140 136,847 Less current portion 108,216 95,130 Non-current portion $ 50,924 $ 41,717

Stockholders_ Equity and Empl20

Stockholders’ Equity and Employee Benefit Plans (Tables)	6 Months Ended
	Jan. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock-based Compensation by Statement of Operations	The following table summarizes stock-based compensation expense for stock option grants, ESPP purchase rights, restricted stock units, or RSUs, and MSUs recorded in our condensed consolidated statements of operations: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 (In thousands) Cost of revenue $ 1,221 $ 1,201 $ 2,349 $ 2,404 Research and development 2,908 2,633 6,125 5,241 Sales and marketing 6,343 5,847 12,561 12,195 General and administrative 2,493 2,436 4,758 4,499 $ 12,965 $ 12,117 $ 25,793 $ 24,339 The following table summarizes stock-based compensation expense by award type: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 (In thousands) RSUs $ 9,494 $ 7,846 $ 19,315 $ 15,284 Stock options 1,601 2,448 3,166 5,154 ESPP 1,284 1,823 2,416 3,901 MSUs 586 — 896 — $ 12,965 $ 12,117 $ 25,793 $ 24,339
Schedule of Unrecognized Stock-Based Compensation Balance	The following table summarizes the unrecognized stock-based compensation balance, net of estimated forfeitures, by type of awards as of January 31, 2016 : As of January 31, 2016 Weighted-Average Amortization Period (In thousands) (In years) RSUs $ 71,705 2.64 Stock options 7,974 2.28 ESPP 4,106 1.05 MSUs 3,503 1.50 Total unrecognized stock-based compensation balance $ 87,288 2.49
Schedule of Determination of Fair Value	using the following assumptions: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 Stock Options: Expected term (in years) 6.08 6.08 6.08 6.08 Risk-free interest rate 1.70 % 1.73 % 1.70 % 1.80 % Expected volatility 52 % 55 % 52 % 56 % Dividend rate — % — % — % — % Weighted average fair value per share $ 9.24 $ 9.40 $ 9.48 $ 8.66 Employee Stock Purchase Plan: Expected term (in years) 0.50-2.00 0.50-2.00 0.50 - 2.00 0.50 - 2.00 Risk-free interest rate 0.51%-0.96% 0.16%-0.71% 0.51% - 0.96% 0.16% - 0.71% Expected volatility 64 % 71 % 64 % 71 % Dividend rate — % — % — % — % Weighted average fair value per share $6.19-$9.44 $7.02-$10.72 $6.19 - $9.44 $7.02-$10.72
Schedule of Stock-Based Compensation Activity	A summary of the stock option activity under our stock plans during the six months ended January 31, 2016 is presented below: Number of Shares Underlying Outstanding Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value (In thousands) (In years) (In thousands) Outstanding as of July 31, 2015 3,357 $ 15.45 6.67 $ 32,040 Granted 74 18.76 Exercised (425 ) 7.91 Canceled due to forfeitures and expirations (134 ) 20.62 Outstanding as of January 31, 2016 2,872 16.40 6.27 9,785 Vested and expected to vest as of January 31, 2016 2,787 16.27 6.20 9,747 Vested and exercisable as of January 31, 2016 1,965 $ 14.60 5.32 $ 9,153
Schedule of Restricted Stock Units Award Activity	A summary of the RSU activity during the six months ended January 31, 2016 is presented below: Number of Units Weighted-Average Grant Date Fair Value Per Share (In thousands) Outstanding as of July 31, 2015 4,406 $ 21.03 Granted 2,014 18.13 Vested (1,104 ) 19.45 Cancellations due to forfeitures (457 ) 19.93 Outstanding as of January 31, 2016 4,859 $ 20.29

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jan. 31, 2016
Segment Reporting [Abstract]
Revenue from External Customers by Geographic Areas	We operate in one segment. The following table represents net revenue based on the customer’s location, as determined by the customer’s shipping address: Three Months Ended January 31, Six Months ended January 31, 2016 2015 2016 2015 (In thousands) Americas $ 58,671 $ 46,578 $ 119,997 $ 91,428 Europe, Middle East and Africa ("EMEA") 27,232 19,228 51,224 35,125 Asia Pacific ("APAC") 10,096 8,498 18,800 14,470 Total net revenue $ 95,999 $ 74,304 $ 190,021 $ 141,023
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	Our property and equipment, net by location is summarized as follows: January 31, 2016 July 31, 2015 (In thousands) Americas $ 21,506 $ 21,807 EMEA 609 712 APAC 1,097 706 Total property and equipment, net $ 23,212 $ 23,225

Description of the Business a22

Description of the Business and Summary of Significant Accounting Policies (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015	Jul. 31, 2015
Exclusive Networks [Member] | Revenue [Member]
Concentration Risk [Line Items]
Concentration risk percentage	14.20%	10.90%	13.30%	11.50%
Exclusive Networks [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk percentage			13.90%		14.00%
Barclays Services Corporation [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk percentage			10.70%

Net Income (Loss) Per Share (De

Net Income (Loss) Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	1,743	3,412	1,632	3,221
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	1,488	1,946	1,355	2,229
Employee Stock Purchase Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	171	58	164	260

Cash Equivalents, Short-Term 24

Cash Equivalents, Short-Term Investments, Restricted Cash and Fair Value Measurements (Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jul. 31, 2015
Short-term investments [Abstract]
Short-term investments, Amortized Cost	$ 194,641	$ 227,746
Short-term investments, Gross Unrealized Gain	7	66
Short-term investments, Gross Unrealized Losses	(221)	(100)
Short-term investments	194,427	227,712
Restricted Cash [Abstract]
Total cash equivalents and short-term investments, Amortized Cost	216,065	236,857
Total cash equivalents and short-term investments, Unrealized Gains	7	67
Total cash equivalents and short-term investments, Unrealized Losses	(225)	(104)
Total cash equivalents and short-term investments, Estimated Fair Value	215,847	236,820
Amortized Cost
Amortized cost, Due within one year	123,035
Amortized cost, Due between one to two years	71,606
Amortized cost, Total	194,641
Estimated Fair Value
Estimated Fair Value, Due within one year	122,933
Estimated Fair Value, Due between one to two years	71,494
Estimated Fair Value, Total	194,427
US Treasury Securities [Member]
Short-term investments [Abstract]
Short-term investments, Amortized Cost	135,602	162,718
Short-term investments, Gross Unrealized Gain	0	50
Short-term investments, Gross Unrealized Losses	(156)	(58)
Short-term investments	135,446	162,710
Restricted Cash [Abstract]
Restricted cash, Amortized Costs Basis	3,420	3,416
Restricted cash, Gross Unrealized Gains	0	1
Restricted cash, Gross Unrealized Losses	(4)	(4)
Restricted cash, Fair Value Disclosure	3,416	3,413
US Government Agencies Securities [Member]
Short-term investments [Abstract]
Short-term investments, Amortized Cost	37,439	42,468
Short-term investments, Gross Unrealized Gain	4	9
Short-term investments, Gross Unrealized Losses	(27)	(10)
Short-term investments	37,416	42,467
FDIC-backed certificates of deposit [Member]
Short-term investments [Abstract]
Short-term investments, Amortized Cost	21,600	22,560
Short-term investments, Gross Unrealized Gain	3	7
Short-term investments, Gross Unrealized Losses	(38)	(32)
Short-term investments	21,565	22,535
Money Market Funds [Member]
Cash equivalents [Abstract]
Cash equivalents, Amortized Cost	18,004	5,695
Cash equivalents, Unrealized Gains	0	0
Cash equivalents, Unrealized Losses	0	0
Cash equivalents, Estimated Fair Value	$ 18,004	$ 5,695

Cash Equivalents, Short-Term 25

Cash Equivalents, Short-Term Investments, Restricted Cash and Fair Value Measurements (Schedule of the Fair Value of Assets and Liabilities by Level) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jul. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 194,427	$ 227,712
Total financial assets	215,847	236,820
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	135,446	162,710
Total financial assets	156,866	171,818
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	58,981	65,002
Total financial assets	58,981	65,002
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Total financial assets	0	0
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	135,446	162,710
Restricted cash	3,416	3,413
US Treasury Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	135,446	162,710
Restricted cash	3,416	3,413
US Treasury Securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
US Treasury Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
US Government Agencies Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	37,416	42,467
US Government Agencies Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
US Government Agencies Securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	37,416	42,467
US Government Agencies Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
FDIC-backed certificates of deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	21,565	22,535
FDIC-backed certificates of deposit [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
FDIC-backed certificates of deposit [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	21,565	22,535
FDIC-backed certificates of deposit [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	18,004	5,695
Money Market Funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	18,004	5,695
Money Market Funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0	0
Money Market Funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	$ 0	$ 0

Inventory and Deferred Revenu26

Inventory and Deferred Revenue (Schedule of Inventory) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jul. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 1,825	$ 2,224
Finished goods	4,884	6,364
Total inventory	$ 6,709	$ 8,588

Inventory and Deferred Revenu27

Inventory and Deferred Revenue (Schedule of Deferred Revenue) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jul. 31, 2015
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 163,444	$ 140,089
Deferred cost of revenue	4,304	3,242
Total deferred revenue, net	159,140	136,847
Less current portion	108,216	95,130
Total deferred income taxes and other tax liabilities	50,924	41,717
Products and Licenses [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	8,314	6,255
Deferred cost of revenue	487	567
Services [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	155,130	133,834
Deferred cost of revenue	$ 3,817	$ 2,675

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	6 Months Ended
	Jan. 31, 2016USD ($)
Guarantor Obligations [Line Items]
Open purchase orders	$ 6.5
Indemnification Agreement [Member]
Guarantor Obligations [Line Items]
Term of guarantee	5 years
Open Purchase Orders [Member]
Guarantor Obligations [Line Items]
Open purchase orders	$ 7.5

Stockholders_ Equity and Empl29

Stockholders’ Equity and Employee Benefit Plans (Stock-based Compensation) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 12,965	$ 12,117	$ 25,793	$ 24,339
Total unrecognized stock-based compensation balance	87,288		$ 87,288
Total unrecognized stock-based compensation balance, Weighted-average amortization			2 years 5 months 26 days
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	9,494	7,846	$ 19,315	15,284
Total unrecognized stock-based compensation balance	71,705		$ 71,705
Total unrecognized stock-based compensation balance, Weighted-average amortization			2 years 7 months 20 days
Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	1,601	2,448	$ 3,166	5,154
Total unrecognized stock-based compensation balance	7,974		$ 7,974
Total unrecognized stock-based compensation balance, Weighted-average amortization			2 years 3 months 10 days
ESPP [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	1,284	1,823	$ 2,416	3,901
Total unrecognized stock-based compensation balance	4,106		$ 4,106
Total unrecognized stock-based compensation balance, Weighted-average amortization			1 year 18 days
MSUs [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	586	0	$ 896	0
Total unrecognized stock-based compensation balance	3,503		$ 3,503
Total unrecognized stock-based compensation balance, Weighted-average amortization			1 year 6 months
Cost of Revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	1,221	1,201	$ 2,349	2,404
Research and Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	2,908	2,633	6,125	5,241
Selling and Marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	6,343	5,847	12,561	12,195
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 2,493	$ 2,436	$ 4,758	$ 4,499

Stockholders_ Equity and Empl30

Stockholders’ Equity and Employee Benefit Plans (Determination of Fair Value) (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	6 years 29 days	6 years 29 days	6 years 29 days	6 years 29 days
Risk-free interest rate	1.70%	1.73%	1.70%	1.80%
Expected volatility	52.00%	55.00%	52.00%	56.00%
Dividend rate	0.00%	0.00%	0.00%	0.00%
Weighted average fair value per share, stock options (in dollars per share)	$ 9.24	$ 9.40	$ 9.48	$ 8.66
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	64.00%	71.00%	64.00%	71.00%
Dividend rate	0.00%	0.00%	0.00%	0.00%
Employee Stock Purchase Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	6 months	6 months	6 months	6 months
Risk-free interest rate	0.51%	0.16%	0.51%	0.16%
Weighted average fair value per share, stock options (in dollars per share)	$ 6.19	$ 7.02	$ 6.19	$ 7.02
Employee Stock Purchase Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	2 years	2 years	2 years	2 years
Risk-free interest rate	0.96%	0.71%	0.96%	0.17%
Weighted average fair value per share, stock options (in dollars per share)	$ 9.44	$ 10.72	$ 9.44	$ 10.72

Stockholders_ Equity and Empl31

Stockholders’ Equity and Employee Benefit Plans (Stock Option Activities) (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jan. 31, 2016	Jul. 31, 2015
Number of Shares Underlying Outstanding Options
Number of Shares Underlying Outstanding Options, Beginning Balance	3,357,000
Number of Shares Underlying Outstanding Options, Granted	74,000
Number of Shares Underlying Outstanding Options, Exercised	(425,000)
Number of Shares Underlying Outstanding Options, Canceled due to forfeitures and expirations	(134,000)
Number of Shares Underlying Outstanding Options, Ending Balance	2,872,000	3,357,000
Number of Shares Underlying Outstanding Options, Vested and Expected to Vest	2,787,000
Number of Shares Underlying Outstanding Options, Exercisable	1,965,000
Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning Balance	$ 15.45
Weighted Average Exercise Price, Granted	18.76
Weighted Average Exercise Price, Exercised	7.91
Weighted Average Exercise Price, Canceled due to forfeitures and expirations	20.62
Weighted Average Exercise Price, Ending Balance	16.40	$ 15.45
Weighted-Average Exercise Price, Vested and Expected to Vest	16.27
Weighted-Average Exercise Price, Exercisable	$ 14.60
Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term	6 years 3 months 7 days	6 years 8 months 1 day
Weighted-Average Remaining Contractual Term, Vested and Expected to Vest	6 years 2 months 12 days
Weighted-Average Remaining Contractual Term, Exercisable	5 years 3 months 25 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Outstanding	$ 9,785	$ 32,040
Aggregate Intrinsic Value, Vested and Expected to Vest	9,747
Aggregate Intrinsic Value, Exercisable	$ 9,153

Stockholders_ Equity and Empl32

Stockholders’ Equity and Employee Benefit Plans (Restricted Stock Units Activities) (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	6 Months Ended
	Jan. 31, 2016$ / sharesshares
Number of Units
Number of Units, Oustanding | shares	4,406
Number of Units, Granted | shares	2,014
Number of Units, Vested | shares	(1,104)
Number of Units, Cancellations due to forfeitures | shares	(457)
Number of Units, Oustanding | shares	4,859
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Outstanding | $ / shares	$ 21.03
Weighted Average Grant Date Fair Value, Granted | $ / shares	18.13
Weighted Average Grant Date Fair Value, Vested | $ / shares	19.45
Weighted Average Grant Date Fair Value, Cancellations due to forfeitures | $ / shares	19.93
Weighted Average Grant Date Fair Value, Outstanding | $ / shares	$ 20.29

Stockholders_ Equity and Empl33

Stockholders’ Equity and Employee Benefit Plans (Market Stock Units) (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Sep. 30, 2015installment$ / sharesshares	Jan. 31, 2016USD ($)	Jan. 31, 2015USD ($)	Jan. 31, 2016USD ($)	Jan. 31, 2015USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense		$ 12,965	$ 12,117	$ 25,793	$ 24,339
Total unrecognized stock-based compensation balance		87,288		87,288
Market Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of installments | installment	3
Percent of target shares	175.00%
Number of units granted | shares	245,000
Weighted average grant date fair value | $ / shares	$ 20.66
Total stock-based compensation expense		586	$ 0	896	$ 0
Total unrecognized stock-based compensation balance		$ 3,503		$ 3,503
Market Stock Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of target shares	0.00%
Market Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of target shares	175.00%

Stockholders_ Equity and Empl34

Stockholders’ Equity and Employee Benefit Plans (Share Repurchase Program) (Details) - USD ($) $ / shares in Units, $ in Millions	Feb. 29, 2016	Jan. 31, 2016	Jan. 31, 2016	Dec. 08, 2015	Nov. 30, 2015
Equity, Class of Treasury Stock [Line Items]
Authorized amount					$ 100
Remaining authorized repurchase amount					50
Accelerated share repurchases expense		$ 40	$ 40
Forward Contracts [Member]
Equity, Class of Treasury Stock [Line Items]
Percent of total amount		20.00%	20.00%
Accelerated share repurchases expense			$ 10
December 8, 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Amount paid for ASR				$ 50
Number of shares received				2,192,982
Percent of total amount				80.00%
February 2016 [Member] | Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares received	2,941,446
Number of additional shares received	748,464
Price paid per share (dollars per share)	$ 17
Amount reclassified to accumulated deficit	$ 4.7
Accelerated Share Repurchase [Member]
Equity, Class of Treasury Stock [Line Items]
Remaining authorized repurchase amount					$ 50

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Provision for income taxes	$ (1,139)	$ (200)	$ (189)	$ 620

Segment Information (Details)

Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016USD ($)	Jan. 31, 2015USD ($)	Jan. 31, 2016USD ($)segment	Jan. 31, 2015USD ($)	Jul. 31, 2015USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reportable segments | segment			1
Net revenue	$ 95,999	$ 74,304	$ 190,021	$ 141,023
Property and equipment, net	23,212		23,212		$ 23,225
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	58,671	46,578	119,997	91,428
Property and equipment, net	21,506		21,506		21,807
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	27,232	19,228	51,224	35,125
Property and equipment, net	609		609		712
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	10,096	8,498	18,800	14,470
Property and equipment, net	1,097		1,097		706
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	56,100	$ 44,100	113,900	$ 86,300
Property and equipment, net	$ 21,400		$ 21,400		$ 21,800

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Millions	Feb. 29, 2016	Feb. 06, 2016
February 2016 [Member]
Subsequent Event [Line Items]
Number of additional shares received	748,464
Number of shares received	2,941,446
Price paid per share (dollars per share)	$ 17
Amount reclassified to accumulated deficit	$ 4.7
IID Security [Member]
Subsequent Event [Line Items]
Cash paid in merger		$ 45