Infoblox 10-Q 4 Dec 14 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Oct. 31, 2014	Nov. 30, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'INFOBLOX INC	'
Entity Central Index Key	'0001223862	'
Current Fiscal Year End Date	'--07-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	31-Oct-14	'
Document Fiscal Year Focus	'2015	'
Document Fiscal Period Focus	'Q1	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	55,828,691

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Oct. 31, 2014	Jul. 31, 2014
In Thousands, unless otherwise specified
CURRENT ASSETS:	'	'
Cash and cash equivalents	$79,544	$78,535
Short-term investments	202,438	191,316
Accounts receivable, net	36,321	36,420
Inventory	7,323	6,345
Deferred tax assets	285	285
Prepaid expenses and other current assets	7,178	7,221
Total current assets	333,089	320,122
Property and equipment, net	18,784	18,785
Restricted cash	3,514	3,516
Intangible assets, net	3,479	4,096
Goodwill	33,293	33,293
Other assets	710	756
TOTAL ASSETS	392,869	380,568
CURRENT LIABILITIES:	'	'
Accounts payable and accrued liabilities	16,274	15,648
Accrued compensation	15,237	13,197
Deferred revenue, net	86,127	81,964
Total current liabilities	117,638	110,809
Deferred revenue, net	35,128	34,149
Deferred tax liability	341	285
Other liabilities	5,821	6,029
TOTAL LIABILITIES	158,928	151,272
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; 55,780 shares and 55,065 shares issued and outstanding as of October 31, 2014 and July 31, 2014	6	6
Additional paid-in capital	380,697	365,833
Accumulated other comprehensive loss	-93	-84
Accumulated deficit	-146,669	-136,459
TOTAL STOCKHOLDERS’ EQUITY	233,941	229,296
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$392,869	$380,568

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Oct. 31, 2014	Jul. 31, 2014
Statement of Financial Position [Abstract]	'	'
Convertible preferred stock, par value (USD per share)	$0.00	$0.00
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)	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	55,780,000	55,065,000
Common stock, shares outstanding	55,780,000	55,065,000

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
Net revenue:	'	'
Products and licenses	$31,508	$35,962
Services	35,211	27,559
Total net revenue	66,719	63,521
Cost of revenue:	'	'
Products and licenses	7,467	7,887
Services	7,467	5,821
Total cost of revenue	14,934	13,708
Gross profit	51,785	49,813
Operating expenses:	'	'
Research and development	14,570	11,600
Sales and marketing	38,455	33,131
General and administrative	7,960	6,986
Total operating expenses	60,985	51,717
Loss from operations	-9,200	-1,904
Other expense, net	-190	-101
Loss before provision for income taxes	-9,390	-2,005
Provision for income taxes	820	544
Net loss	($10,210)	($2,549)
Net loss per share - basic and diluted (USD per share)	($0.18)	($0.05)
Weighted-average shares used in computing net loss per share - basic and diluted (shares)	55,371	52,274

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
Statement of Comprehensive Income [Abstract]	'	'
Net loss	($10,210)	($2,549)
Unrealized holding gain (loss) on short-term investments, net	-9	22
Comprehensive loss	($10,219)	($2,527)

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net loss	($10,210)	($2,549)
Adjustments to reconcile net loss to net cash provided by operating activities:	'	'
Stock-based compensation	12,222	9,041
Depreciation and amortization	2,213	2,105
Excess tax benefits from employee stock plans	-600	-441
Other	598	144
Changes in operating assets and liabilities:	'	'
Accounts receivable, net	99	-917
Inventory	-978	-818
Prepaid expenses, other current assets and other assets	597	759
Accounts payable and accrued liabilities	1,380	1,517
Accrued compensation	2,040	1,137
Deferred revenue, net	5,142	5,117
Other liabilities	-208	-189
Net cash provided by operating activities	12,295	14,906
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Purchases of short-term investments	-32,577	-27,067
Proceeds from maturities of short-term investments	20,340	21,560
Proceeds from sales of short-term investments	1,001	0
Purchases of property and equipment	-1,751	-1,507
Net cash used in investing activities	-12,987	-7,014
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from issuance of common stock under the employee stock plans	1,535	6,080
Excess tax benefits from employee stock plans	600	441
Net cash provided by financing activities	2,135	6,521
Effect of foreign exchange rate changes on cash and cash equivalents	-434	0
NET INCREASE IN CASH AND CASH EQUIVALENTS	1,009	14,413
CASH AND CASH EQUIVALENTS—Beginning of period	78,535	69,828
CASH AND CASH EQUIVALENTS—End of period	79,544	84,241
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:	'	'
Purchases of property and equipment not yet paid	328	203
Cash paid for income taxes, net	$172	$117

Description_of_the_Business_an

Description of the Business and Summary of Significant Accounting Policies	3 Months Ended
	Oct. 31, 2014
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 October 31, 2014 and the condensed consolidated statements of operations, the condensed consolidated statements of comprehensive loss and the condensed consolidated statements of cash flows for the three months ended October 31, 2014 and 2013 are unaudited. The condensed consolidated balance sheet as of July 31, 2014 was derived from the audited consolidated balance sheet as of July 31, 2014. 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, 2014.
	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 the fair presentation of our balance sheet as of October 31, 2014, our results of operations, comprehensive loss and cash flows for the three months ended October 31, 2014 and 2013. All adjustments are of a normal recurring nature. The results for the three months ended October 31, 2014 are not necessarily indicative of the results to be expected for any subsequent quarter or for the year ending July 31, 2015.
	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, 2014. There have been no significant changes in our accounting policies during the three months ended October 31, 2014, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the year ended July 31, 2014.
	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 gross accounts receivable balance at each respective balance sheet date. For the three months ended October 31, 2014, Exclusive Networks Ltd., a distributor, accounted for 11.6% of our total net revenue. For the three months ended October 31, 2013, no customer represented more than 10% of our total net revenue. Exclusive Networks Ltd. and Arrow Electronics, Inc. accounted for 11.0% and 10.2% of our total gross accounts receivable as of October 31, 2014. Exclusive Networks Ltd. accounted for 12.8% of our total gross accounts receivable as of July 31, 2014. 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 May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in 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 is effective for us in the first quarter of our fiscal 2018 using 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. Early adoption is not permitted. We are currently evaluating adoption 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	3 Months Ended
	Oct. 31, 2014
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 loss per share for the periods presented because including them would have been antidilutive:
		Three Months Ended October 31,
		2014	2013
		(In thousands)
	Restricted stock units	3,267	1,533
	Stock options to purchase common stock	3,023	4,353
	Employee Stock Purchase Plan	271	327

Cash_Equivalents_ShortTerm_Inv

Cash Equivalents, Short-Term Investments, Restricted Cash and Fair Value Measurements	3 Months Ended
	Oct. 31, 2014
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 October 31, 2014:
		Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
		(In thousands)
	Cash equivalents:
	Money market funds	$	8,563	$	—	$	—		$	8,563
	Short-term investments:
	U.S. Treasury securities	142,269		42		(42		)	142,269
	U.S. government agency securities	39,903		2		(31		)	39,874
	FDIC-backed certificates of deposit	20,360		5		(70		)	20,295
	Total short-term investments	202,532		49		(143		)	202,438
	Restricted cash:
	U.S. Treasury securities	3,413		1		—			3,414
	Total cash equivalents, short-term investments and restricted cash	$	214,508	$	50	$	(143	)	$	214,415
	The following table presents the contractual maturities of our short-term investments which are classified as available-for-sale securities as of October 31, 2014:
		Amortized Cost		Estimated Fair Value
		(In thousands)
	Due within one year	$	104,893	$	104,901
	Due after one year through two years	97,639		97,537
	Total	$	202,532	$	202,438
	We classify our available-for-sale investments as short-term investments in our condensed consolidated balance sheet based on management's intention to have the funds available for use in operations or strategic investments rather than actual maturity dates.
	The following table summarizes our cash equivalents, short-term investments and restricted cash as of July 31, 2014:
		Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
		(In thousands)
	Cash equivalents:
	Money market funds	$	7,550	$	—	$	—		$	7,550
	U.S. Treasury securities	2,000		—		—			2,000
	Total cash equivalents	9,550		—		—			9,550
	Short-term investments:
	U.S. Treasury securities	136,729		37		(65		)	136,701
	U.S. government agency securities	37,433		3		(53		)	37,383
	FDIC-backed certificates of deposit	17,240		4		(12		)	17,232
	Total short-term investments	191,402		44		(130		)	191,316
	Restricted cash:
	U.S. Treasury securities	3,413		2		—			3,415
	Total cash equivalents, short-term investments and restricted cash	$	204,365	$	46	$	(130	)	$	204,281
	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 October 31, 2014 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	$	8,563	$	—	$	—		$	8,563
	Short-term investments:
	U.S. Treasury securities	142,269		—		—			142,269
	U.S. government agency securities	—		39,874		—			39,874
	FDIC-backed certificates of deposit	—		20,295		—			20,295
	Total short-term investments	142,269		60,169		—			202,438
	Restricted cash:
	U.S. Treasury securities	3,414		—		—			3,414
	Total financial assets	$	154,246	$	60,169	$	—		$	214,415
		Fair Value Measurements at July 31, 2014 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	$	7,550	$	—	$	—		$	7,550
	U.S. Treasury securities	2,000		—		—			2,000
	Total cash equivalents	9,550		—		—			9,550
Short-term investments:
U.S. Treasury securities	136,701		—		—			136,701
U.S. government agency securities	—		37,383		—			37,383
FDIC-backed certificates of deposit	—		17,232		—			17,232
Total short-term investments	136,701		54,615		—			191,316
Restricted cash:
U.S. Treasury securities	3,415		—		—			3,415
Total financial assets	$	149,666	$	54,615	$	—		$	204,281
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 months ended October 31, 2014.

Inventory_and_Deferred_Revenue

Inventory and Deferred Revenue	3 Months Ended
	Oct. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Inventory and Deferred Revenue	'
	INVENTORY AND DEFERRED REVENUE
	Inventory
	Inventory consists of the following:
		October 31, 2014		July 31, 2014
		(In thousands)
	Raw materials	$	343	$	474
	Finished goods	6,980		5,871
	Total inventory	$	7,323	$	6,345
	Deferred Revenue, Net
	Deferred revenue, net consists of the following:
		October 31, 2014		July 31, 2014
		(In thousands)
	Deferred revenue:
	Products and licenses	$	5,983	$	5,120
	Services	117,390		112,642
	Total deferred revenue	123,373		117,762
	Deferred cost of revenue:
	Products and licenses	616		449
	Services	1,502		1,200
	Total deferred cost of revenue	2,118		1,649
	Total deferred revenue, net	121,255		116,113
	Less current portion	86,127		81,964
	Non-current portion	$	35,128	$	34,149

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Oct. 31, 2014
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. As of October 31, 2014, we had $7.6 million of open purchase orders with this independent contract manufacturer that may not be cancelable.
	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 matters 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.
	Ansfield v. Infoblox Inc., et al., Case No. 3:14-cv-02500-VC (N.D. Cal.); Beqaj v. Infoblox Inc., et al., Case No. 3:14-cv-02564-VC (N.D. Cal.); and Achey, et al. v. Infoblox Inc., et al., Case No. 3:14-cv-02644-VC (N.D. Cal.). Beginning on May 30, 2014, the first of three putative securities class action suits was filed in the United States District Court for the Northern District of California against the Company and two of its officers. These suits, which have been deemed to be related cases, allege that defendants made materially false and misleading statements, or failed to disclose material facts, regarding the Company’s financial results, business, operations and prospects. The suits assert claims covering the period from September 5, 2013 through May 29, 2014, are purportedly brought on behalf of purchasers of the Company's securities during that period, and seek compensatory damages, interest, costs and expenses, as well as equitable or other relief. On September 25, 2014, the lead plaintiffs were appointed and the suits consolidated.  On November 25, 2014, the lead plaintiffs voluntarily dismissed their claims without prejudice.
	Burnam v. Infoblox Inc., et al., Case No, 5:14-cv-05107-PSG (N.D. Cal). On November 19, 2014, a stockholder derivative lawsuit was filed in the United State District Court for the Northern District of California against current and former officers and directors of the Company, with the Company as a nominal defendant. The case is based on allegations similar to those in the securities class action and asserts claims for breach of fiduciary duties, waste of corporate assets, insider trading and misappropriation of information, gross mismanagement, and unjust enrichment.  As of December 4, 2014, the defendants have not yet responded to the complaint. Due to the inherent uncertainties of litigation, we cannot accurately predict the ultimate outcome of this matter.  We are unable at this time to determine whether the outcome of the litigation would have a material impact on our results of operations, financial condition or cash flows.
	On April 16, 2013, Versata Software, Inc., or Versata, filed suit against us in the United States District Court for the District of Delaware in an action captioned Versata Software, Inc. F/K/A Trilogy Software, Inc.; and Versata Development Group, Inc. F/K/A Trilogy Development Group, Inc. v. Infoblox, Inc., Case No 1:13-cv-00678-UNA (D.Del.) (the “Action”).  In the Action, Versata alleges that we directly and/or indirectly infringed U.S. Patent Nos. 6,834,282; 6,907,414; 7,363,593 and 7,426,481 by making, using, licensing, selling and offering for sale software products and related services including but not limited to Infoblox IP Address Management. In December 2013, we filed a motion to dismiss the Action. A hearing was held on the motion in August 2014 and the parties are awaiting the ruling on the motion. We continue to believe we have meritorious defenses to the claims asserted in these actions and intend to defend vigorously against them. We believe at this time that liabilities associated with these cases, while possible, are not probable, and therefore we have not recorded any accrual for them as of October 31, 2014 and July 31, 2014. Further, any possible range of loss cannot be reasonably estimated at this time.

Stockholders_Equity_and_Employ

Stockholders’ Equity and Employee Benefit Plans	3 Months Ended
	Oct. 31, 2014
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 and restricted stock units recorded in our condensed consolidated statements of operations:
		Three Months Ended October 31,
		2014			2013
		(In thousands)
	Cost of revenue	$	1,203		$	704
	Research and development	2,608			1,672
	Sales and marketing	6,348			5,192
	General and administrative	2,063			1,473
		$	12,222		$	9,041
	The following table summarizes stock-based compensation expense by award type:
		Three Months Ended October 31,
		2014			2013
		(In thousands)
	RSUs	$	7,438		$	4,771
	Stock options	2,706			3,068
	ESPP	2,078			1,202
		$	12,222		$	9,041
	The following table summarizes the unrecognized stock-based compensation balance, net of estimated forfeitures, by type of awards as of October 31, 2014:
			As of October 31, 2014			Weighted-Average Amortization Period
			(In thousands)			(In years)
	RSUs		$	70,125		2.66
	Stock options		14,005			1.94
	ESPP		6,087			1.13
	Total unrecognized stock-based compensation balance		$	90,217		2.45
	Determination of Fair Value
	The fair value of stock option grants was estimated at the date of grant and start of the offering period using the following assumptions:
		Three Months Ended October 31,
		2014			2013
	Expected term (in years)	6.08			6.08
	Risk-free interest rate	1.88		%	1.83		%
	Expected volatility	57		%	54		%
	Dividend rate	—		%	—		%
	Weighted average fair value per share	$	7.9		$	21.98
	Stock Option Activity
	A summary of the stock option activity under our stock plans during the three months ended October 31, 2014 is presented below:
			Number of		Weighted-			Weighted-	Aggregate Intrinsic Value
			Shares		Average			Average
			Underlying		Exercise Price			Remaining
			Outstanding					Contractual
			Options					Term
			(In thousands)					(In years)	(In thousands)
	Outstanding as of July 31, 2014		4,914		$	12.52		6.67	$	14,980
	Granted		348		$	14.49
	Exercised		(303	)	$	6.74
	Canceled due to forfeitures		(117	)	$	17.66
	Outstanding as of October 31, 2014		4,842		$	12.9		6.64	$	26,409
	Vested and expected to vest as of October 31, 2014		4,695		$	12.7		6.58	$	26,136
	Vested and exercisable as of October 31, 2014		2,931		$	9.84		5.63	$	21,539
	Restricted Stock Unit Activity
	A summary of the restricted stock unit activity during the three months ended October 31, 2014 is presented below:
			Number of Units		Weighted-Average Grant Date Fair Value Per Share
			(In thousands)
	Outstanding as of July 31, 2014		3,442		$	26.47
	Granted		1,480		$	14.4
	Vested		(412	)	$	33.33
	Cancellations due to forfeitures		(262	)	$	26.04
	Outstanding as of October 31, 2014		4,248		$	21.62

Income_Taxes

Income Taxes	3 Months Ended
	Oct. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	The provision for income taxes for the three months ended October 31, 2014 and 2013 was $0.8 million and $0.5 million, which consisted of federal minimum taxes, and state and foreign income taxes. The increase in the provision for income taxes for the three months ended October 31, 2014 compared to the same period in the prior year was principally attributable to higher federal and foreign income taxes as a result of higher fiscal 2015 projected taxable income
	For the three months ended October 31, 2014 and 2013, our provisions for income taxes 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. and Canadian deferred tax assets.
	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 October 31, 2014 and July 31, 2014. 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 months ended October 31, 2014, there have been no material changes to the total amount of unrecognized tax benefits.

Segment_Information

Segment Information	3 Months Ended
	Oct. 31, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	SEGMENT INFORMATION
	We operate in one single segment. The following table represents net revenue based on the customer’s location, as determined by the customer’s shipping address:
		Three Months Ended October 31,
		2014		2013
		(In thousands)
	Americas	$	44,850	$	43,303
	Europe, Middle East and Africa ("EMEA")	15,897		13,978
	Asia Pacific ("APAC")	5,972		6,240
	Total net revenue	$	66,719	$	63,521
	Included within the Americas total in the above table is revenue from sales in the United States of $42.3 million and $40.4 million for the three months ended October 31, 2014 and 2013. Aside from the United States, no other country comprised more than 10% of our net revenue for the three months ended October 31, 2014 and 2013.
	Our property and equipment, net by location is summarized as follows:
		October 31,		July 31,
		2014		2014
		(In thousands)
	Americas	$	17,823	$	17,882
	EMEA	667		669
	APAC	294		234
	Total property and equipment, net	$	18,784	$	18,785
	Included within the Americas total in the above table is property and equipment, net in the United States of $17.5 million and $17.8 million as of October 31, 2014 and July 31, 2014.

Description_of_the_Business_an1

Description of the Business and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Oct. 31, 2014
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 October 31, 2014 and the condensed consolidated statements of operations, the condensed consolidated statements of comprehensive loss and the condensed consolidated statements of cash flows for the three months ended October 31, 2014 and 2013 are unaudited. The condensed consolidated balance sheet as of July 31, 2014 was derived from the audited consolidated balance sheet as of July 31, 2014. 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, 2014.
	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 the fair presentation of our balance sheet as of October 31, 2014, our results of operations, comprehensive loss and cash flows for the three months ended October 31, 2014 and 2013. All adjustments are of a normal recurring nature. The results for the three months ended October 31, 2014 are not necessarily indicative of the results to be expected for any subsequent quarter or for the year ending July 31, 2015.
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 gross accounts receivable balance at each respective balance sheet date. For the three months ended October 31, 2014, Exclusive Networks Ltd., a distributor, accounted for 11.6% of our total net revenue. For the three months ended October 31, 2013, no customer represented more than 10% of our total net revenue. Exclusive Networks Ltd. and Arrow Electronics, Inc. accounted for 11.0% and 10.2% of our total gross accounts receivable as of October 31, 2014. Exclusive Networks Ltd. accounted for 12.8% of our total gross accounts receivable as of July 31, 2014. 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 May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in 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 is effective for us in the first quarter of our fiscal 2018 using 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. Early adoption is not permitted. We are currently evaluating adoption methods and whether this standard will have a material impact on our condensed consolidated financial statements.

Net_Income_Loss_Per_Share_Tabl

Net Income (Loss) Per Share (Tables)	3 Months Ended
	Oct. 31, 2014
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 loss per share for the periods presented because including them would have been antidilutive:
		Three Months Ended October 31,
		2014	2013
		(In thousands)
	Restricted stock units	3,267	1,533
	Stock options to purchase common stock	3,023	4,353
	Employee Stock Purchase Plan	271	327

Cash_Equivalents_ShortTerm_Inv1

Cash Equivalents, Short-Term Investments, Restricted Cash and Fair Value Measurements (Tables)	3 Months Ended
	Oct. 31, 2014
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, 2014:
		Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
		(In thousands)
	Cash equivalents:
	Money market funds	$	7,550	$	—	$	—		$	7,550
	U.S. Treasury securities	2,000		—		—			2,000
	Total cash equivalents	9,550		—		—			9,550
	Short-term investments:
	U.S. Treasury securities	136,729		37		(65		)	136,701
	U.S. government agency securities	37,433		3		(53		)	37,383
	FDIC-backed certificates of deposit	17,240		4		(12		)	17,232
	Total short-term investments	191,402		44		(130		)	191,316
	Restricted cash:
	U.S. Treasury securities	3,413		2		—			3,415
	Total cash equivalents, short-term investments and restricted cash	$	204,365	$	46	$	(130	)	$	204,281
	The following table summarizes our cash equivalents, short-term investments and restricted cash as of October 31, 2014:
		Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
		(In thousands)
	Cash equivalents:
	Money market funds	$	8,563	$	—	$	—		$	8,563
	Short-term investments:
	U.S. Treasury securities	142,269		42		(42		)	142,269
	U.S. government agency securities	39,903		2		(31		)	39,874
	FDIC-backed certificates of deposit	20,360		5		(70		)	20,295
	Total short-term investments	202,532		49		(143		)	202,438
	Restricted cash:
	U.S. Treasury securities	3,413		1		—			3,414
	Total cash equivalents, short-term investments and restricted cash	$	214,508	$	50	$	(143	)	$	214,415
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 October 31, 2014:
		Amortized Cost		Estimated Fair Value
		(In thousands)
	Due within one year	$	104,893	$	104,901
	Due after one year through two years	97,639		97,537
	Total	$	202,532	$	202,438
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 October 31, 2014 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	$	8,563	$	—	$	—		$	8,563
	Short-term investments:
	U.S. Treasury securities	142,269		—		—			142,269
	U.S. government agency securities	—		39,874		—			39,874
	FDIC-backed certificates of deposit	—		20,295		—			20,295
	Total short-term investments	142,269		60,169		—			202,438
	Restricted cash:
	U.S. Treasury securities	3,414		—		—			3,414
	Total financial assets	$	154,246	$	60,169	$	—		$	214,415
		Fair Value Measurements at July 31, 2014 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	$	7,550	$	—	$	—		$	7,550
	U.S. Treasury securities	2,000		—		—			2,000
	Total cash equivalents	9,550		—		—			9,550
	Short-term investments:
	U.S. Treasury securities	136,701		—		—			136,701
	U.S. government agency securities	—		37,383		—			37,383
	FDIC-backed certificates of deposit	—		17,232		—			17,232
	Total short-term investments	136,701		54,615		—			191,316
	Restricted cash:
	U.S. Treasury securities	3,415		—		—			3,415
	Total financial assets	$	149,666	$	54,615	$	—		$	204,281

Inventory_and_Deferred_Revenue1

Inventory and Deferred Revenue (Tables)	3 Months Ended
	Oct. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Schedule of Inventory	'
	Inventory consists of the following:
		October 31, 2014		July 31, 2014
		(In thousands)
	Raw materials	$	343	$	474
	Finished goods	6,980		5,871
	Total inventory	$	7,323	$	6,345
Schedule of Deferred Revenue, Net	'
	Deferred revenue, net consists of the following:
		October 31, 2014		July 31, 2014
		(In thousands)
	Deferred revenue:
	Products and licenses	$	5,983	$	5,120
	Services	117,390		112,642
	Total deferred revenue	123,373		117,762
	Deferred cost of revenue:
	Products and licenses	616		449
	Services	1,502		1,200
	Total deferred cost of revenue	2,118		1,649
	Total deferred revenue, net	121,255		116,113
	Less current portion	86,127		81,964
	Non-current portion	$	35,128	$	34,149

Stockholders_Equity_and_Employ1

Stockholders’ Equity and Employee Benefit Plans (Tables)	3 Months Ended
	Oct. 31, 2014
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 and restricted stock units recorded in our condensed consolidated statements of operations:
		Three Months Ended October 31,
		2014			2013
		(In thousands)
	Cost of revenue	$	1,203		$	704
	Research and development	2,608			1,672
	Sales and marketing	6,348			5,192
	General and administrative	2,063			1,473
		$	12,222		$	9,041
	The following table summarizes stock-based compensation expense by award type:
		Three Months Ended October 31,
		2014			2013
		(In thousands)
	RSUs	$	7,438		$	4,771
	Stock options	2,706			3,068
	ESPP	2,078			1,202
		$	12,222		$	9,041
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 October 31, 2014:
			As of October 31, 2014			Weighted-Average Amortization Period
			(In thousands)			(In years)
	RSUs		$	70,125		2.66
	Stock options		14,005			1.94
	ESPP		6,087			1.13
	Total unrecognized stock-based compensation balance		$	90,217		2.45
Schedule of Determination of Fair Value	'
	The fair value of stock option grants was estimated at the date of grant and start of the offering period using the following assumptions:
		Three Months Ended October 31,
		2014			2013
	Expected term (in years)	6.08			6.08
	Risk-free interest rate	1.88		%	1.83		%
	Expected volatility	57		%	54		%
	Dividend rate	—		%	—		%
	Weighted average fair value per share	$	7.9		$	21.98
Schedule of Stock-Based Compensation Activity	'
	A summary of the stock option activity under our stock plans during the three months ended October 31, 2014 is presented below:
			Number of		Weighted-			Weighted-	Aggregate Intrinsic Value
			Shares		Average			Average
			Underlying		Exercise Price			Remaining
			Outstanding					Contractual
			Options					Term
			(In thousands)					(In years)	(In thousands)
	Outstanding as of July 31, 2014		4,914		$	12.52		6.67	$	14,980
	Granted		348		$	14.49
	Exercised		(303	)	$	6.74
	Canceled due to forfeitures		(117	)	$	17.66
	Outstanding as of October 31, 2014		4,842		$	12.9		6.64	$	26,409
	Vested and expected to vest as of October 31, 2014		4,695		$	12.7		6.58	$	26,136
	Vested and exercisable as of October 31, 2014		2,931		$	9.84		5.63	$	21,539
Schedule of Restricted Stock Units Award Activity	'
	A summary of the restricted stock unit activity during the three months ended October 31, 2014 is presented below:
			Number of Units		Weighted-Average Grant Date Fair Value Per Share
			(In thousands)
	Outstanding as of July 31, 2014		3,442		$	26.47
	Granted		1,480		$	14.4
	Vested		(412	)	$	33.33
	Cancellations due to forfeitures		(262	)	$	26.04
	Outstanding as of October 31, 2014		4,248		$	21.62

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Oct. 31, 2014
Segment Reporting [Abstract]	'
Revenue from External Customers by Geographic Areas	'
	We operate in one single segment. The following table represents net revenue based on the customer’s location, as determined by the customer’s shipping address:
		Three Months Ended October 31,
		2014		2013
		(In thousands)
	Americas	$	44,850	$	43,303
	Europe, Middle East and Africa ("EMEA")	15,897		13,978
	Asia Pacific ("APAC")	5,972		6,240
	Total net revenue	$	66,719	$	63,521
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	'
	Our property and equipment, net by location is summarized as follows:
		October 31,		July 31,
		2014		2014
		(In thousands)
	Americas	$	17,823	$	17,882
	EMEA	667		669
	APAC	294		234
	Total property and equipment, net	$	18,784	$	18,785

Description_of_the_Business_an2

Description of the Business and Summary of Significant Accounting Policies (Details)	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Exclusive Networks [Member] | Revenue [Member]	'	'
Organization [Line Items]	'	'
Concentration risk percentage	11.60%	'
Exclusive Networks [Member] | Accounts Receivable [Member]	'	'
Organization [Line Items]	'	'
Concentration risk percentage	11.00%	12.80%
Arrow Electronics [Member] | Accounts Receivable [Member]	'	'
Organization [Line Items]	'	'
Concentration risk percentage	10.20%	'

Net_Income_Loss_Per_Share_Deta

Net Income (Loss) Per Share (Details)	3 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
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	3,267	1,533
Stock Option [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Antidilutive securities excluded from computation of earnings per share	3,023	4,353
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	271	327

Cash_Equivalents_ShortTerm_Inv2

Cash Equivalents, Short-Term Investments, Restricted Cash and Fair Value Measurements (Available-for-sale Securities) (Details) (USD $)	Oct. 31, 2014	Jul. 31, 2014
In Thousands, unless otherwise specified
Cash equivalents [Abstract]	'	'
Cash equivalents, Amortized Cost	'	$9,550
Cash equivalents, Unrealized Gains	'	0
Cash equivalents, Unrealized Losses	'	0
Cash equivalents, Estimated Fair Value	'	9,550
Short-term investments [Abstract]	'	'
Short-term investments, Amortized Cost	202,532	191,402
Short-term investments, Gross Unrealized Gain	49	44
Short-term investments, Gross Unrealized Losses	-143	-130
Short-term investments	202,438	191,316
Restricted Cash [Abstract]	'	'
Total cash equivalents and short-term investments, Amortized Cost	214,508	204,365
Total cash equivalents and short-term investments, Unrealized Gains	50	46
Total cash equivalents and short-term investments, Unrealized Losses	-143	-130
Total cash equivalents and short-term investments, Estimated Fair Value	214,415	204,281
Amortized Cost	'	'
Amortized cost, Due within one year	104,893	'
Amortized cost, Due between one to two years	97,639	'
Amortized cost, Total	202,532	'
Estimated Fair Value	'	'
Estimated Fair Value, Due within one year	104,901	'
Estimated Fair Value, Due between one to two years	97,537	'
Estimated Fair Value, Total	202,438	'
US Treasury Securities [Member]	'	'
Short-term investments [Abstract]	'	'
Short-term investments, Amortized Cost	142,269	136,729
Short-term investments, Gross Unrealized Gain	42	37
Short-term investments, Gross Unrealized Losses	-42	-65
Short-term investments	142,269	136,701
Restricted Cash [Abstract]	'	'
Restricted cash, Amortized Costs Basis	3,413	3,413
Restricted cash, Gross Unrealized Gains	1	2
Restricted cash, Gross Unrealized Losses	0	0
Restricted cash, Fair Value Disclosure	3,414	3,415
US Government Agencies Securities [Member]	'	'
Short-term investments [Abstract]	'	'
Short-term investments, Amortized Cost	39,903	37,433
Short-term investments, Gross Unrealized Gain	2	3
Short-term investments, Gross Unrealized Losses	-31	-53
Short-term investments	39,874	37,383
FDIC-backed certificates of deposit [Member]	'	'
Short-term investments [Abstract]	'	'
Short-term investments, Amortized Cost	20,360	17,240
Short-term investments, Gross Unrealized Gain	5	4
Short-term investments, Gross Unrealized Losses	-70	-12
Short-term investments	20,295	17,232
Money Market Funds [Member]	'	'
Cash equivalents [Abstract]	'	'
Cash equivalents, Amortized Cost	8,563	7,550
Cash equivalents, Unrealized Gains	0	0
Cash equivalents, Unrealized Losses	0	0
Cash equivalents, Estimated Fair Value	8,563	7,550
US Treasury Securities [Member]	'	'
Cash equivalents [Abstract]	'	'
Cash equivalents, Amortized Cost	'	2,000
Cash equivalents, Unrealized Gains	'	0
Cash equivalents, Unrealized Losses	'	0
Cash equivalents, Estimated Fair Value	'	$2,000

Cash_Equivalents_ShortTerm_Inv3

Cash Equivalents, Short-Term Investments, Restricted Cash and Fair Value Measurements (Schedule of the Fair Value of Assets and Liabilities by Level) (Details) (USD $)	Oct. 31, 2014	Jul. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	'	$9,550
Short-term investments	202,438	191,316
Total financial assets	214,415	204,281
Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	'	9,550
Short-term investments	142,269	136,701
Total financial assets	154,246	149,666
Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	'	0
Short-term investments	60,169	54,615
Total financial assets	60,169	54,615
Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	'	0
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	142,269	136,701
Restricted cash	3,414	3,415
US Treasury Securities [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	142,269	136,701
Restricted cash	3,414	3,415
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	39,874	37,383
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	39,874	37,383
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	20,295	17,232
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	20,295	17,232
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	8,563	7,550
Money Market Funds [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	8,563	7,550
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
US Treasury Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	'	2,000
US Treasury Securities [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	'	2,000
US Treasury Securities [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	'	0
US Treasury Securities [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	'	$0

Inventory_and_Deferred_Revenue2

Inventory and Deferred Revenue (Schedule of Inventory) (Details) (USD $)	Oct. 31, 2014	Jul. 31, 2014
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'
Raw materials	$343	$474
Finished goods	6,980	5,871
Total inventory	$7,323	$6,345

Inventory_and_Deferred_Revenue3

Inventory and Deferred Revenue (Schedule of Deferred Revenue) (Details) (USD $)	Oct. 31, 2014	Jul. 31, 2014
In Thousands, unless otherwise specified
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	$123,373	$117,762
Deferred cost of revenue	2,118	1,649
Total deferred revenue, net	121,255	116,113
Less current portion	86,127	81,964
Total deferred income taxes and other tax liabilities	35,128	34,149
Products and Licenses [Member]	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	5,983	5,120
Deferred cost of revenue	616	449
Services [Member]	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	117,390	112,642
Deferred cost of revenue	$1,502	$1,200

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Oct. 31, 2014
Guarantor Obligations [Line Items]	'
Open purchase orders	$7.60
Indemnification Agreement [Member]	'
Guarantor Obligations [Line Items]	'
Term of guarantee	'5 years

Stockholders_Equity_and_Employ2

Stockholders’ Equity and Employee Benefit Plans (Stock-based Compensation) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	$12,222	$9,041
Total unrecognized stock-based compensation balance	90,217	'
Total unrecognized stock-based compensation balance, Weighted-average amortization	'2 years 5 months 12 days	'
Restricted Stock Units (RSUs) [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	7,438	4,771
Total unrecognized stock-based compensation balance	70,125	'
Total unrecognized stock-based compensation balance, Weighted-average amortization	'2 years 7 months 27 days	'
Stock Option [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	2,706	3,068
Total unrecognized stock-based compensation balance	14,005	'
Total unrecognized stock-based compensation balance, Weighted-average amortization	'1 year 11 months 8 days	'
Employee Stock Purchase Plan [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	2,078	1,202
Total unrecognized stock-based compensation balance	6,087	'
Total unrecognized stock-based compensation balance, Weighted-average amortization	'1 year 1 month 17 days	'
Cost of Revenue [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	1,203	704
Research and Development [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	2,608	1,672
Selling and Marketing [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	6,348	5,192
General and Administrative Expense [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total stock-based compensation expense	$2,063	$1,473

Stockholders_Equity_and_Employ3

Stockholders’ Equity and Employee Benefit Plans (Determination of Fair Value) (Details) (Stock Option [Member], USD $)	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Stock Option [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Expected term (in years)	'6 years 0 months 29 days	'6 years 0 months 29 days
Risk-free interest rate	1.88%	1.83%
Expected volatility	57.00%	54.00%
Dividend rate	0.00%	0.00%
Weighted average fair value per share, stock options (in dollars per share)	$7.90	$21.98

Stockholders_Equity_and_Employ4

Stockholders’ Equity and Employee Benefit Plans (Stock Option Activities) (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013	Jul. 31, 2014
Number of Shares Underlying Outstanding Options [Roll Forward]	'	'	'
Number of Shares Underlying Outstanding Options, Beginning Balance	4,914,000	'	'
Number of Shares Underlying Outstanding Options, Granted	348,000	'	'
Number of Shares Underlying Outstanding Options, Exercised	-303,000	'	'
Number of Shares Underlying Outstanding Options, Canceled due to Forfeitures	-117,000	'	'
Number of Shares Underlying Outstanding Options, Ending Balance	4,842,000	'	'
Number of Shares Underlying Outstanding Options, Vested and Expected to Vest	4,695,000	'	'
Number of Shares Underlying Outstanding Options, Exercisable	2,931,000	'	'
Weighted Average Exercise Price [Roll Forward]	'	'	'
Weighted Average Exercise Price, Beginning Balance	$12.52	'	'
Weighted Average Exercise Price, Granted	$14.49	'	'
Weighted Average Exercise Price, Exercised	$6.74	'	'
Weighted Average Exercise Price, Canceled due to Forfeitures	$17.66	'	'
Weighted Average Exercise Price, Ending Balance	$12.90	'	'
Weighted-Average Exercise Price, Vested and Expected to Vest	$12.70	'	'
Weighted-Average Exercise Price, Exercisable	$9.84	'	'
Weighted Average Remaining Contractual Term [Abstract]	'	'	'
Weighted Average Remaining Contractual Term	'6 years 7 months 20 days	'6 years 8 months 1 day	'
Weighted-Average Remaining Contractual Term, Vested and Expected to Vest	'6 years 6 months 29 days	'	'
Weighted-Average Remaining Contractual Term, Exercisable	'5 years 7 months 17 days	'	'
Aggregate Intrinsic Value [Abstract]	'	'	'
Aggregate Intrinsic Value, Outstanding	$26,409	'	$14,980
Aggregate Intrinsic Value, Vested and Expected to Vest	26,136	'	'
Aggregate Intrinsic Value, Exercisable	$21,539	'	'

Stockholders_Equity_and_Employ5

Stockholders’ Equity and Employee Benefit Plans (Restricted Stock Units Activities) (Details) (Restricted Stock Units (RSUs) [Member], USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Oct. 31, 2014
Restricted Stock Units (RSUs) [Member]	'
Number of Units [Roll Forward]	'
Number of Units, Oustanding	3,442
Number of Units, Granted	1,480
Number of Units, Vested	-412
Number of Units, Cancellations due to forfeitures	-262
Number of Units, Oustanding	4,248
Weighted Average Grant Date Fair Value [Roll Forward]	'
Weighted Average Grant Date Fair Value, Outstanding	$26.47
Weighted Average Grant Date Fair Value, Granted	$14.40
Weighted Average Grant Date Fair Value, Vested	$33.33
Weighted Average Grant Date Fair Value, Cancellations due to forfeitures	$26.04
Weighted Average Grant Date Fair Value, Outstanding	$21.62

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
Income Tax Disclosure [Abstract]	'	'
Provision for income taxes	$820	$544

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013	Jul. 31, 2014
	segment
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Number of reportable segments	1	'	'
Net revenue	$66,719	$63,521	'
Property and equipment, net	18,784	'	18,785
Americas [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenue	44,850	43,303	'
Property and equipment, net	17,823	'	17,882
EMEA [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenue	15,897	13,978	'
Property and equipment, net	667	'	669
Asia Pacific [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenue	5,972	6,240	'
Property and equipment, net	294	'	234
United States [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Net revenue	42,300	40,400	'
Property and equipment, net	$17,500	'	$17,800