Aruba Networks (ARUN) 10-K 24 Sep 14 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Jul. 31, 2014	Sep. 19, 2014	Jan. 31, 2014
Document and Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Jul-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'FY	'	'
Trading Symbol	'ARUN	'	'
Entity Registrant Name	'ARUBA NETWORKS, INC.	'	'
Entity Central Index Key	'0001173752	'	'
Current Fiscal Year End Date	'--07-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$2,098,823,213
Entity Common Stock, Shares Outstanding	'	109,092,738	'

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$118,594	$144,919
Short-term investments	166,359	269,882
Accounts receivable, less allowances of $333 and $805, respectively	102,256	93,191
Inventory	39,836	28,895
Deferred costs of revenue	12,721	12,657
Prepaids and other current assets	18,063	20,090
Deferred income tax assets, current	25,676	29,076
Total current assets	483,505	598,710
Property and equipment, net	27,261	27,536
Goodwill	67,242	67,242
Intangible assets, net	19,505	26,937
Deferred income tax assets, non-current	23,962	19,788
Other non-current assets	8,185	6,530
Total assets	629,660	746,743
Current liabilities	'	'
Accounts payable	23,763	24,891
Accrued liabilities	79,491	94,632
Income taxes payable, current	1,087	662
Deferred revenue, current	135,160	109,765
Total current liabilities	239,501	229,950
Deferred revenue, non-current	44,977	31,578
Other non-current liabilities	12,686	8,990
Total liabilities	297,164	270,518
Commitments and contingencies (Note 12)	'	'
Stockholders’ equity	'	'
Common stock: $0.0001 par value; 350,000 shares authorized; 107,557 and 113,409 shares issued and outstanding, respectively	11	11
Additional paid-in capital	508,374	623,155
Accumulated other comprehensive loss	-1,523	-1,540
Accumulated deficit	-174,366	-145,401
Total stockholders’ equity	332,496	476,225
Total liabilities and stockholders’ equity	$629,660	$746,743

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Accounts receivable, allowance for doubtful accounts net	$333	$805
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares issued	107,557,000	113,409,000
Common stock, shares outstanding	107,557,000	113,409,000

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jul. 31, 2014		Jul. 31, 2013		Jul. 31, 2012
Revenue	'		'		'
Product	$595,375		$496,343		$434,733
Support and professional services	133,558		103,701		82,036
Total revenue	728,933		600,044		516,769
Cost of revenue	'		'		'
Product	186,976	[1]	149,113	[1]	130,446	[1]
Support and professional services	37,805	[1]	27,366	[1]	20,992	[1]
Total cost of revenue	224,781	[1]	176,479	[1]	151,438	[1]
Gross profit	504,152		423,565		365,331
Operating expenses	'		'		'
Research and development	169,328	[1]	139,746	[1]	109,448	[1]
Sales and marketing	274,835	[1]	230,805	[1]	198,373	[1]
General and administrative	60,004	[1]	51,030	[1]	46,775	[1]
Legal settlements	250		14,000		0
Total operating expenses	504,417		435,581		354,596
Operating income (loss)	-265		-12,016		10,735
Other income, net	'		'		'
Interest income	843		1,138		1,194
Other income (expense), net	-173		653		1,631
Total other income, net	670		1,791		2,825
Income (loss) before income taxes	405		-10,225		13,560
Provision for income taxes	29,370		21,383		22,411
Net loss	-28,965		-31,608		-8,851
Shares used in computing net loss per common share, basic (in shares)	108,443		113,284		108,774
Net loss per common share, basic (in dollars per share)	($0.27)		($0.28)		($0.08)
Shares used in computing net loss per common share, diluted (in share)	108,443		113,284		108,774
Net loss per common share, diluted (in dollars per share)	($0.27)		($0.28)		($0.08)
Stock-based Compensation Expense Allocation [Abstract]	'		'		'
Stock-based compensation expense	111,181		96,226		83,912
Cost of revenue [Member]	'		'		'
Stock-based Compensation Expense Allocation [Abstract]	'		'		'
Stock-based compensation expense	8,580		6,559		5,318
Research and development [Member]	'		'		'
Stock-based Compensation Expense Allocation [Abstract]	'		'		'
Stock-based compensation expense	43,983		36,366		31,203
Sales and marketing [Member]	'		'		'
Stock-based Compensation Expense Allocation [Abstract]	'		'		'
Stock-based compensation expense	42,128		37,782		34,653
General and administrative [Member]	'		'		'
Stock-based Compensation Expense Allocation [Abstract]	'		'		'
Stock-based compensation expense	$16,490		$15,519		$12,738
[1]	Includes stock-based compensation expense as follows: Cost of revenue: $8,580, $6,559 and $5,318 for the years ended July 31, 2014, 2013 and 2012. Research and development: $43,983, $36,366 and $31,203 for the years ended July 31, 2014, 2013 and 2012. Sales and marketing: $42,128, $37,782 and $34,653 for the years ended July 31, 2014, 2013 and 2012. General and administrative: $16,490, $15,519 and $12,738 for the years ended July 31, 2014, 2013 and 2012.

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Statement of Comprehensive Income [Abstract]	'	'	'
Net loss	($28,965)	($31,608)	($8,851)
Unrealized gains (losses), net of taxes of $(11), $88, and $(14), respectively	84	-135	32
Realized gains reclassified into earnings	-67	0	-12
Net change in unrealized gains (losses) on short-term investments	17	-135	20
Net change in cumulative translation adjustments	0	0	-1,552
Other comprehensive income (loss)	17	-135	-1,532
Comprehensive loss	($28,948)	($31,743)	($10,383)

CONSOLIDATED_STATEMENTS_OF_COM1

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Statement of Comprehensive Income [Abstract]	'	'	'
Unrealized gains (losses), taxes	($11)	$88	($14)

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
In Thousands, except Share data, unless otherwise specified
Beginning balance at Jul. 31, 2011	$345,342	$10	$450,147	$127	($104,942)
Beginning balance, shares at Jul. 31, 2011	'	104,905,000	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'
Fair value of shares issued to non-employees, value	1,453	'	1,453	'	'
Fair value of shares issued to non-employees, shares	'	36,000	'	'	'
Exercise of common stock options, value	21,435	1	21,434	'	'
Exercise of common stock options, shares	3,753,478	3,745,000	'	'	'
Shares issued under employee stock purchase plan, value	13,344	'	13,344	'	'
Shares issued under employee stock purchase plan, shares	'	853,000	'	'	'
Repurchase of common stock under stock repurchase program, value	-19,884	'	-19,884	'	'
Repurchase of common stock under stock repurchase program, shares	'	-1,409,000	'	'	'
Stock-based compensation expense related to stock options and restricted stock awards, value	85,293	'	85,293	'	'
Stock-based compensation expense related to stock options and restricted stock awards, shares	'	2,778,000	'	'	'
Excess tax benefit associated with stock-based compensation	19,768	'	19,768	'	'
Common stock issued in purchase acquisition, value	10,522	'	10,522	'	'
Common stock issued in purchase acquisition, shares	'	621,000	'	'	'
Unrealized gains (losses) on short-term investments, net of taxes	20	'	'	20	'
Foreign currency translation adjustments, net of taxes	-1,552	'	'	-1,552	'
Net loss	-8,851	'	'	'	-8,851
Ending balance at Jul. 31, 2012	466,890	11	582,077	-1,405	-113,793
Ending balance, shares at Jul. 31, 2012	'	111,529,000	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'
Fair value of shares issued to non-employees, value	623	'	623	'	'
Fair value of shares issued to non-employees, shares	'	71,000	'	'	'
Exercise of common stock options, value	19,196	0	19,196	'	'
Exercise of common stock options, shares	2,860,592	2,860,000	'	'	'
Shares issued under employee stock purchase plan, value	13,998	'	13,998	'	'
Shares issued under employee stock purchase plan, shares	'	838,000	'	'	'
Repurchase of common stock under stock repurchase program, value	-86,211	'	-86,211	'	'
Repurchase of common stock under stock repurchase program, shares	'	-5,311,000	'	'	'
Stock-based compensation expense related to stock options and restricted stock awards, value	93,187	'	93,187	'	'
Stock-based compensation expense related to stock options and restricted stock awards, shares	'	3,422,000	'	'	'
Excess tax benefit associated with stock-based compensation	285	'	285	'	'
Unrealized gains (losses) on short-term investments, net of taxes	-135	'	'	-135	'
Foreign currency translation adjustments, net of taxes	0	'	'	'	'
Net loss	-31,608	'	'	'	-31,608
Ending balance at Jul. 31, 2013	476,225	11	623,155	-1,540	-145,401
Ending balance, shares at Jul. 31, 2013	113,409,000	113,409,000	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'
Fair value of shares issued to non-employees, value	317	'	317	'	'
Fair value of shares issued to non-employees, shares	'	66,000	'	'	'
Exercise of common stock options, value	10,360	0	10,360	'	'
Exercise of common stock options, shares	2,778,312	2,778,000	'	'	'
Shares issued under employee stock purchase plan, value	15,377	'	15,377	'	'
Shares issued under employee stock purchase plan, shares	'	1,089,000	'	'	'
Repurchase of common stock under stock repurchase program, value	-263,029	'	-263,029	'	'
Repurchase of common stock under stock repurchase program, shares	'	-14,730,000	'	'	'
Stock-based compensation expense related to stock options and restricted stock awards, value	106,517	'	106,517	'	'
Stock-based compensation expense related to stock options and restricted stock awards, shares	'	4,945,000	'	'	'
Excess tax benefit associated with stock-based compensation	15,677	'	15,677	'	'
Unrealized gains (losses) on short-term investments, net of taxes	17	'	'	17	'
Foreign currency translation adjustments, net of taxes	0	'	'	'	'
Net loss	-28,965	'	'	'	-28,965
Ending balance at Jul. 31, 2014	$332,496	$11	$508,374	($1,523)	($174,366)
Ending balance, shares at Jul. 31, 2014	107,557,000	107,557,000	'	'	'

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Cash flows from operating activities	'	'	'
Net loss	($28,965)	($31,608)	($8,851)
Adjustments to reconcile net loss to net cash provided by operating activities:	'	'	'
Depreciation and amortization	29,495	23,701	19,123
Change in provision for doubtful accounts	-101	797	125
Write-downs for excess and obsolete inventory	4,289	5,597	4,113
Stock-based compensation expense	111,181	96,226	83,912
Amortization of discounts and premiums on short-term investments	1,931	1,413	1,142
Loss on disposal of property and equipment	244	269	544
Change in valuation of contingent rights liability	0	-1,665	-2,319
Deferred income taxes	-3,774	-237	15,369
Recovery of escrow funds	0	0	-702
Excess tax benefit associated with stock-based compensation	-18,822	-9,906	-21,572
Changes in operating assets and liabilities, net of effects of acquisitions:	'	'	'
Accounts receivable	-8,964	-13,524	-11,374
Inventory	-15,230	-15,970	1,615
Prepaids and other current assets	2,302	-356	-14,594
Deferred costs of revenue	-64	-1,417	-4,658
Other non-current assets	-1,655	6,119	-8,131
Accounts payable and other current and non-current liabilities	-20,545	43,856	4,456
Deferred revenue	38,794	38,282	34,522
Income taxes payable	22,576	11,636	20,141
Net cash provided by operating activities	112,692	153,213	112,861
Cash flows from investing activities	'	'	'
Purchases of short-term investments	-159,231	-287,183	-189,218
Proceeds from sales of short-term investments	89,238	75,806	55,790
Proceeds from maturities of short-term investments	171,613	151,718	72,650
Purchases of property and equipment	-19,417	-20,655	-13,044
Purchases of intangible assets	-2,750	0	0
Investments in privately-held companies	0	-1,750	0
Cash paid in acquisitions, net of cash acquired	0	-16,767	-22,505
Net cash provided by (used in) investing activities	79,453	-98,831	-96,327
Cash flows from financing activities	'	'	'
Proceeds from issuance of common stock	25,737	33,194	34,779
Repurchases of common stock under stock repurchase program	-263,029	-86,211	-19,884
Excess tax benefit associated with stock-based compensation	18,822	9,906	21,572
Net cash provided by (used in) financing activities	-218,470	-43,111	36,467
Effect of exchange rate changes on cash and cash equivalents	0	19	-145
Net increase (decrease) in cash and cash equivalents	-26,325	11,290	52,856
Cash and cash equivalents, beginning of period	144,919	133,629	80,773
Cash and cash equivalents, end of period	118,594	144,919	133,629
Supplemental disclosure of cash flow information	'	'	'
Income taxes paid	5,440	3,344	5,587
Non-cash investing and financing activities	'	'	'
Net change in accounts payable and accrued liabilities related to purchases of property and equipment	40	-513	873
Common stock issued for acquisition	$0	$0	$12,000

The_Company_and_its_Significan

The Company and its Significant Accounting Policies	12 Months Ended
	Jul. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
The Company and its Significant Accounting Policies	'
	The Company and its Significant Accounting Policies
	The Company
	Aruba Networks, Inc. (the “Company”) is a leading global provider of enterprise mobility solutions. The Company develops, markets and sells products and services that help solve its customers’ secure mobility requirements through its Mobility-Defined Networks, a network architecture designed to automatically optimize infrastructure-wide performance and trigger security actions that previously required manual intervention by information technology (“IT”) departments. The Company’s goal is to provide simplified, dependable solutions that enable IT departments to quickly, securely and cost-effectively meet their mobility and bring-your-own-device (“BYOD”) needs. The Company’s Mobility-Defined Networks are designed for the all-wireless workplace and an increasingly mobile universe of end-users, who the Company calls GenMobile, who rely on mobile devices for nearly every aspect of their work life and personal communication. The Company derives its revenue primarily from sales of Mobility Controllers with ArubaOS operating system software, controller-less and controller-managed wireless access points, Mobility Access Switches, value-added security software modules, access management system solutions, multi-vendor management solution software, mobility management solution and other software, and support and professional services. The Company has offices in the Americas, Europe, the Middle East and the Asia Pacific regions and employs staff around the world.
	Significant Accounting Policies
	Principles of Consolidation
	The accompanying Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated.
	Use of Estimates
	The preparation of these financial statements in conformity with generally accepted accounting principles in the United States of America requires that the Company make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses as presented in the Consolidated Financial Statements and accompanying notes. The Company’s critical accounting policies are those that affect the Company’s financial statements materially and involve subjective or complex judgments by management. Significant Company estimates include, among others, revenue recognition, stock-based compensation, inventory valuation, allowances for doubtful accounts, fair value measurements, impairment of goodwill and intangible assets, accounting for income taxes, and loss contingencies. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Although these estimates are based on management’s best knowledge of current events and actions that may impact the Company in the future, actual results may differ from the estimates made by management with respect to these and other items.
	Prior Period Adjustments
	In the fourth quarter of fiscal 2014, the Company recorded certain out-of-period adjustments to correct errors that reduced revenue by $1.5 million in the three months ended July 31, 2014, of which $0.7 million relates to the three months ended January 31, 2014 and $0.8 million relates to fiscal 2011. The impact of this correction resulted in an increase in the Company's net loss of $0.9 million in the three months ended July 31, 2014 and $0.4 million in fiscal 2014. The Company has assessed the impact of these adjustments for the three months ended July 31, 2014 and fiscal 2014, and on previously reported financial statements and concluded that the adjustments are not material, either individually or in the aggregate, to any of the aforementioned reporting periods, including previously reported Consolidated Financial Statements for the three months ended January 31, 2014 and fiscal 2011. On that basis, the Company has recorded the adjustments in the three months ended July 31, 2014.
	In the first quarter of fiscal 2013, the Company recorded an out-of-period adjustment to correct an error that increased the provision for income taxes by $1.8 million which related to the fourth quarter of fiscal 2012. The impact of this correction would have resulted in an increase in net loss of $1.8 million for the fourth quarter of fiscal 2012 and fiscal 2012. The Company assessed the impact of this adjustment on previously reported financial statements and for fiscal 2013 and concluded that the adjustment was not material, either individually or in the aggregate to previously reported Consolidated Financial Statements. On that basis, the Company recorded the adjustment in the first quarter of fiscal 2013.
	Reclassifications
	The ratable product and related support and professional services revenue and the related cost of revenue in fiscal 2012 have been reclassified to support and professional services revenue and related cost of revenue in the accompanying Consolidated Statements of Operations. The Company believes the ratable product and related support and professional services revenue and related cost of revenue are not material to total revenue and cost of revenue, and the nature of these amounts are consistent with support and professional services revenue and related cost of revenue. The amounts for fiscal 2012 have been reclassified to conform with the current presentation.
	Foreign Currency Transactions
	The functional currency of the Company's foreign subsidiaries is the U.S. dollar. Accordingly, the Company's monetary assets and liabilities of the foreign subsidiaries are re-measured into U.S. dollars at the exchange rates in effect at the reporting date, non-monetary assets and liabilities are translated at historical rates, and revenue and expenses are translated at average exchange rates in effect during each reporting period. The transaction gains and losses are included as a component of other income, net in the accompanying Consolidated Statements of Operations.
	Previously, the Company's Irish subsidiary used the Euro as its functional currency. Consequently, all assets and liabilities were translated to U.S. dollars using exchange rates in effect at the balance sheet dates. Translation adjustments were included in stockholders' equity in the accompanying Consolidated Balance Sheets as a component of accumulated other comprehensive loss. As of May 1, 2012, the Company changed its operational strategy and determined that the Irish subsidiary will buy and sell in U.S. dollars. Consequently, the Company changed its functional currency designation for the subsidiary from the Euro to U.S. dollars as of May 1, 2012. The cumulative translation adjustment of $1.5 million as of July 31, 2014 and July 31, 2013 is considered to be the basis in the assets of the Irish subsidiary and will remain as a component of accumulated other comprehensive loss until such time as the Irish subsidiary is liquidated.
	Risks and Uncertainties
	The Company is subject to all of the risks inherent in operating in the networking and communications industry. These risks include, but are not limited to, new and rapidly evolving markets, a lengthy sales cycle, dependence on the development of new products and services, unfavorable economic and market conditions, customer acceptance of new products, competition from larger and more established companies, limited management resources, dependence on a limited number of contract manufacturers and suppliers, and the changing nature of the networking and communications industry. Failure by the Company to anticipate or to respond adequately to technological developments in its industry, changes in customer or supplier requirements, changes in regulatory requirements or industry standards, or any significant delays in the development or introduction of products and services, would have a material adverse effect on the Company's business, operating results and financial position.
	Fair Value of Financial Instruments
	The Company measures its financial instruments at fair value or amounts that approximate fair value. The Company maximizes the use of observable inputs and minimizes the use of unobservable inputs when developing fair value measurements. When available, the Company uses quoted market prices to measure fair value. If market prices are not available, fair value measurement is based upon models that use primarily market-based or independently-sourced market parameters. If market observable inputs for model-based valuation techniques are not available, the Company makes judgments about assumptions market participants would use in estimating the fair value of the financial instrument. Carrying values of cash equivalents, short-term investments, accounts receivable, accounts payable, and accrued liabilities approximate their fair values due to the short-term nature and liquidity of these financial instruments.
	Cash and Cash Equivalents
	The Company considers all highly liquid marketable securities purchased with an original maturity of 90 days or less at the time of purchase to be cash equivalents. Cash and cash equivalents are comprised of cash, sweep funds and money market funds. Due to the short-term nature and liquidity of these financial instruments, the carrying value of these assets approximates fair value.
	Short-Term Investments
	Short-term investments comprise marketable securities that consist primarily of corporate bonds, U.S. government agency securities, U.S. treasury bills, commercial paper, certificates of deposit, municipal notes, and bonds with original maturities beyond 90 days at the time of purchase. As the Company views all of its marketable securities as representing the investment of funds available for current operations, and management has the ability and intent, if necessary, to liquidate any of these investments in order to meet the Company’s liquidity needs within the next 12 months, the short-term investments are classified as available-for-sale. The Company’s policy is to protect the value of its investment portfolio and minimize principal risk by earning returns based on current interest rates. The Company's marketable securities are carried at fair value, with the unrealized gains and losses, net of tax, reported as a component of stockholders' equity.
	The Company reviews the individual securities in its portfolio to determine whether a decline in a security’s fair value below the amortized cost basis is other-than-temporary. If other-than-temporary impairment (“OTTI”) has been incurred, and it is more likely than not that the Company will not sell the investment security before the recovery of its amortized cost basis, then the OTTI is separated into (a) the amount representing the credit loss and (b) the amount related to all other factors. The amount of the total OTTI related to the credit loss is recognized in earnings. The amount of the total OTTI related to other factors is recognized in accumulated other comprehensive loss. The Company determined that there were no investments in its portfolio that were other-than-temporarily impaired as of July 31, 2014 and 2013.
	Concentrations of Credit Risk
	Financial instruments that potentially subject the Company to a concentration of credit risk include cash, cash equivalents, short-term investments and accounts receivable. The Company maintains its cash, cash equivalents and short-term investments with high credit quality financial institutions and has not experienced any losses on its deposits of its cash and cash equivalents and its short-term investments due to concentration of credit risk. The Company’s accounts receivable are derived from revenue earned from customers located in the Americas, Europe, the Middle East and Africa, and Asia Pacific. The Company performs ongoing credit evaluations of its customers’ financial conditions and generally requires no collateral from its customers. The Company maintains an allowance for doubtful accounts based upon the expected collectability of accounts receivable, and to date such losses have been within management’s expectations. See Note 11, Segment Information and Significant Customers, in the Notes to Consolidated Financial Statements for more details on significant customers.
	Allowance for Doubtful Accounts
	The Company records an allowance for doubtful accounts based on historical experience and a detailed assessment of the collectability of its accounts receivable. In estimating the allowance for doubtful accounts, management considers, among other factors, (i) the aging of the accounts receivable, including trends within and ratios involving the age of the accounts receivable, (ii) the Company’s historical write-offs, (iii) the credit-worthiness of each customer, (iv) the economic conditions of the customer’s industry, and (v) general economic conditions. In cases where the Company is aware of circumstances that may impair a specific customer’s ability to meet its financial obligations, the Company records a specific allowance against amounts due from the customer, and thereby reduces the net recognized receivable to the amount it reasonably believes will be collected.
	Charges to operations relating to allowance for doubtful accounts were $(0.1) million, $0.8 million, and $0.1 million for fiscal 2014, 2013, and 2012, respectively.
	Inventory
	Inventory consists of hardware and related component parts and is stated at the lower of cost or market. Cost is computed using the standard cost, which approximates actual cost, on a first-in, first-out basis. The Company records inventory write-downs for potentially excess inventory based on forecasted demand, economic trends, and technological obsolescence of its products and transition of inventory related to new product releases. At the point of loss recognition, a new, lower-cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in the restoration or increase in that newly established cost basis. Inventory write-downs are reflected as cost of product revenue and amounted to approximately $4.3 million, $5.6 million, and $4.1 million, for fiscal 2014, 2013, and 2012, respectively.
	Deferred Costs of Revenue
	When the Company’s products have been delivered, but the product revenue associated with the arrangement has been deferred as a result of not meeting the revenue recognition criteria, the Company also defers the related inventory costs for the delivered items.
	Property and Equipment, net
	Property and equipment, net are stated at historical cost net of accumulated depreciation. Property and equipment, excluding leasehold improvements, are depreciated using the straight-line method over the estimated useful lives of the respective assets, generally ranging from two to six years. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful lives of the respective assets, or the lease term. Leasehold improvements are recorded at cost with any reimbursements from the landlord being accounted for as a reduction of rent expense using the straight-line method over the lease term. Expenditures for maintenance and repairs are expensed as incurred and significant improvements and betterments that substantially enhance the life of an asset are capitalized.
	Upon retirement or sale, the cost of assets disposed of and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is credited or charged to the statement of operations, under other income, net. Disposals resulted in a loss of $0.2 million, $0.3 million, and $0.5 million for fiscal 2014, 2013, and 2012 respectively.
	Software Development Costs
	The Company capitalizes certain costs incurred to develop software for internal use and amortizes the capitalized costs on a straight-line basis over the estimated useful life, generally three years. Such capitalized costs include external direct costs utilized in developing or obtaining the applications and payroll and payroll-related expenses for employees who are directly associated with developing the applications. Capitalization of such costs begins when the internal-use software system has reached the application development stage and ceases when the project is substantially complete and ready for its intended purpose. Capitalized internal-use software is included in the computer software category within property and equipment, net, in the Company's Consolidated Balance Sheets. For fiscal 2014 and 2013, the Company capitalized costs associated with internal-use software totaling $1.2 million and $3.5 million, respectively. The unamortized balance of capitalized internal-use software at July 31, 2014 and July 31, 2013 was $3.3 million and related amortization expense for fiscal 2014 and 2013 was $1.2 million and $0.2 million, respectively. There were no capitalized costs for internal-use software in fiscal 2012.
	The Company expenses costs to develop software products or the software component of products to be marketed to external users, before technological feasibility of such products is reached. After technological feasibility is established, material software development costs are capitalized. To date, the period between achieving technological feasibility, which the Company has defined as the establishment of a working model, which typically occurs when beta testing commences, and the general availability of such software has been short and software development costs qualifying for capitalization have been insignificant. Accordingly, the Company has not capitalized any related software development costs for fiscal 2014 and 2013.
	Intangible Assets, net
	Intangible assets with finite lives are carried at cost, less accumulated amortization. Amortization is computed using the straight-line method over the estimated economic lives of the assets, which range from one to thirteen years.
	Impairment of Long-lived Assets and Indefinite-lived Intangibles
	Long-lived assets, including intangible assets with finite lives, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Determination of recoverability is based on an estimate of undiscounted future cash flows resulting from the use of the asset and its eventual disposition. Measurement of an impairment loss for long-lived assets that management expects to hold and use is based on the fair value of the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds their fair value, which is typically calculated using discounted expected future cash flows. The Company did not recognize any significant impairment charges during fiscal 2014, 2013, and 2012.
	Indefinite-lived intangible assets, such as in-process research and development intangibles, are intangible assets that are not subject to amortization and are tested for impairment annually, during the Company's fourth fiscal quarter, or sooner if events or changes in circumstances indicate that the asset might be impaired. The impairment test consists of a comparison of the fair value of an indefinite-lived intangible asset with its carrying amount. If the carrying amount of an indefinite-lived intangible asset exceeds its fair value, an impairment loss shall be recognized in an amount equal to that excess. Once the research and development efforts are completed or abandoned, the Company shall determine the useful life of the assets and is required to perform an impairment test of the asset. The Company did not recognize any impairment charges related to indefinite-lived intangible assets during fiscal 2014, 2013, and 2012.
	Goodwill
	Goodwill represents the excess cost of a business acquisition over the fair value of the net assets acquired. The Company performs impairment testing on its goodwill at least annually, during its fourth fiscal quarter, and sooner if indicators of impairment exist at the reporting unit level. The Company performs its impairment testing by first assessing qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of its reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of its reporting unit is less than its carrying amount, the Company performs a two-step impairment test. The first step requires the identification of the reporting units and comparison of the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of the reporting unit is less than its carrying value, an indication of goodwill impairment exists for the reporting unit and the second step of the impairment test is performed to compute the amount of the impairment. Under the second step, an impairment loss is recognized for any excess of the carrying amount of the reporting unit’s goodwill over the implied fair value of that goodwill. The Company has determined that it has only one reporting unit. The Company did not recognize any impairment charges related to goodwill during fiscal 2014, 2013, and 2012.
	Revenue Recognition
	Total revenue is derived primarily from the sale of products and services, including support and professional services. The following revenue recognition policies define the manner in which the Company accounts for its sales transactions.
	The Company recognizes revenue when all of the following criteria have occurred: (1) the Company has entered into a legally binding arrangement with a customer; (2) delivery has occurred or the title and risk of loss has passed; (3) customer payment is deemed fixed or determinable and free of contingencies and significant uncertainties; and (4) collection is reasonably assured.
	The Company’s fees are typically considered to be fixed or determinable at the inception of an arrangement, generally based on specific products and quantities to be delivered. Substantially all of the Company’s contracts do not include rights of return or acceptance provisions. To the extent that the Company’s agreements contain such terms, the Company recognizes revenue once the customer has accepted, or once the acceptance provisions or right of return lapses. Payment terms to customers generally range from net 30 to 90 days. In the event payment terms are provided that differ from the Company’s standard business practices, the fees are deemed to not be fixed or determinable and revenue is recognized when the payments are received, provided the remaining criteria for revenue recognition have been met.
	The Company assesses the ability to collect from its customers based on a number of factors, including credit worthiness of the customer and past transaction history of the customer. If the customer is not deemed credit worthy, the Company defers revenue from the arrangement until payment is received and all other revenue recognition criteria have been met. The Company records estimated sales returns as a reduction to revenue upon shipment based on its contractual obligations and historical returns experience. In cases where the Company is aware of circumstances that will likely result in a specific customer’s request to return purchased equipment, the Company records a specific sales returns reserve.
	The Company’s revenue recognition policies provide that, when a sales arrangement contains multiple elements, such as hardware and software licenses and/or services, the Company allocates revenue to each element based on a selling price hierarchy. The selling price for a deliverable is based on its vendor specific objective evidence (“VSOE”) of selling price if available, third party evidence (“TPE”) of selling price, if VSOE is not available, or best estimated selling price (“BESP”) if neither VSOE nor TPE is available. In multiple element arrangements where non-essential software deliverables are included, revenue for these multiple-element arrangements is allocated to the software deliverable and the non-software deliverables based on the relative selling prices of all of the deliverables in the arrangement using the hierarchy in the applicable accounting guidance. The Company limits the amount of revenue recognition for delivered elements to the amount that is not contingent on the future delivery of products or services, future performance obligations or subject to customer-specified return or refund privileges.
	The Company establishes VSOE of selling price using the price charged for a deliverable based upon the normal pricing and discounting practices when sold separately. VSOE for support services, professional services, and training is measured by the stand-alone renewal rate offered to the customer. In determining VSOE, the Company requires that a substantial majority of the selling prices for an element falls within a reasonably narrow pricing range, generally evidenced by a substantial majority of such historical stand-alone transactions falling within a reasonably narrow range of the median rates. In addition, the Company considers major service groups, geographies, customer classifications, and other variables in determining VSOE.
	TPE of selling price is established by evaluating largely similar and interchangeable competitor products or services in standalone sales to similarly situated customers. The Company is typically not able to determine TPE for the Company’s products or services. Generally, the Company’s go-to-market strategy differs from that of the Company’s peers and the Company’s offerings contain a significant level of differentiation such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, the Company is unable to reliably determine selling prices of competitor products and services on a stand-alone basis.
	When the Company is unable to establish the selling price of its non-software elements using VSOE or TPE, the Company uses BESP in its allocation of the arrangement consideration. The objective of BESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. The Company determines BESP for a product or service by considering multiple factors including, but not limited to, cost of products, gross margin objectives, pricing practices, geographies, customer classes and distribution channels.
	The Company regularly reviews estimated selling price of the product offerings and maintains internal controls over the establishment and updates of these estimates. The Company currently does not expect a material impact in the near term from changes in estimated selling prices, including VSOE of selling price.
	Products
	Product revenue consists of revenue from sales of the Company’s hardware appliances, perpetual software licenses, and software as a service. The majority of the Company’s products are hardware appliances containing software components that function together to provide the essential functionality of the product. Therefore, the Company’s hardware appliances are considered non-software elements and are not subject to the industry-specific software revenue recognition guidance. For these appliances, delivery occurs upon transfer of title and risk of loss, which is generally upon shipment. It is the Company’s practice to ensure an end-user has been identified by the channel partner prior to shipment to a channel partner. For end-users and channel partners, the Company generally has no significant obligations for future performance such as rights of return or pricing credits.
	For sales to direct end-users and certain channel partners, including value-added resellers (“VARs”), the Company recognizes product revenue upon delivery, assuming all other revenue recognition criteria are met. The Company also sells through value-added distributors (“VADs”). A significant portion of the Company’s sales are made through VADs under agreements allowing for stocking of the Company’s products in their inventory, pricing credits and limited rights of return for stock rotation. Product revenue on sales made through these VADs is initially deferred and revenue is recognized upon sell-through as reported by the VADs to the Company.
	The Company’s product revenue also includes revenue from the sale of stand-alone software products. Stand-alone software products may operate on the Company’s hardware appliance but are not considered essential to the functionality of the hardware. Sales of stand-alone software generally include a perpetual license to the Company’s software. For sales of stand-alone software, the Company recognizes revenue based on software revenue recognition guidance. Under the software revenue recognition guidance, the Company uses the residual method to recognize revenue when a product agreement includes one or more elements to be delivered at a future date and VSOE of the fair value of all undelivered elements exists. In the majority of the Company’s contracts, the only element that remains undelivered at the time of delivery of the product is support services. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the contract fee is recognized as product revenue. If evidence of the fair value of one or more undelivered elements does not exist, all revenue is generally deferred and recognized when delivery of those elements occurs or when fair value can be established. When the only undelivered element for which the Company does not have VSOE of selling price is support, revenue for the entire arrangement is bundled and recognized ratably over the support period. Product revenue for the Company's software as a service is recognized ratably over the contractually committed service delivery period.
	Services
	Service revenue consists of revenue from support agreements, professional services, and training. Support services include repair and replacement of defective hardware appliances, software updates and access to technical support personnel. Software updates provide customers with rights to unspecified software product upgrades and to maintenance releases and patches released during the term of the support period. Revenue for support services is recognized on a straight-line basis over the service contract term, which is typically one to five years. Revenue for professional services is recognized upon delivery or completion of performance. Professional service arrangements are typically short-term in nature and are largely completed within 90 days from the start of service. Revenue for training services is recognized upon delivery of the training. Costs associated with these service offerings are expensed as incurred.
Post-contractual services (“PCS”) that the Company provides to its channel partners differ from PCS that it provides to its end customers in that the Company is only obligated to provide support services to the channel partner directly, while the channel partner is obligated to provide support services directly to the end customer. The channel partner is obligated to provide to the end customer first level troubleshooting assistance as well as second level support for high-level technical and product diagnosis which might include returned merchandise fulfillment. The Company’s obligations are only to provide software upgrades and, in the unusual scenario in which the channel partner is unable to provide the technical support that the end customer requires, a third level technical diagnosis and support.
As discussed above under Reclassifications, ratable product and related support and professional services revenue and the related cost of revenue in fiscal 2012 has been reclassified to support and professional services revenue and related cost of revenue to conform to current presentation.
Shipping and Handling
Shipping charges billed to customers are included in product revenue and the related shipping costs are included in cost of product revenue.
Research and Development Expenses
Research and development costs, primarily consisting of salaries and employee benefits, including stock-based compensation costs, as well as, administrative costs, other than capitalized software development costs, are charged to operations as incurred.
Stock-Based Compensation
The Company measures and recognizes compensation expense for all stock-based awards made to employees and non-employees under the fair value method. The Company’s stock-based awards include stock options, restricted stock units and awards, employee stock purchase plan, and performance-based awards. The Company calculates the fair value of restricted stock and performance-based awards, which are paid in restricted stock, based on the fair market value of its common stock on the date of grant. The Company calculates the fair value of stock options and employee stock purchase plan shares on the date of grant using the Black-Scholes option-pricing model. This methodology requires the use of subjective assumptions such as expected stock price volatility over the term of the awards, actual and projected employee stock option exercise behaviors, risk-free interest rates and expected dividends. This fair value is then amortized on a straight-line basis over the requisite service period of the awards, which is generally the vesting period. The Company determines the amount of stock-based compensation expense based on awards that it ultimately expects to vest, reduced for estimated forfeitures. In addition, stock-based compensation expense includes the effects of awards modified, repurchased or cancelled.
Income Taxes
The Company estimates its income taxes based on the various jurisdictions where it conducts business. Significant judgment is required in determining its worldwide income tax provision. Deferred income taxes are recorded for the expected tax consequences of temporary differences between the tax bases of assets and liabilities for financial reporting purposes and amounts recognized for income tax purposes. The Company records a valuation allowance to reduce its deferred tax assets to the amount of future tax benefit that is more likely than not to be realized.
Foreign earnings that are considered to be permanently reinvested outside of the United States are excluded from U.S. tax provision.
A two-step approach is applied for the recognition and measurement of uncertain tax positions taken or expected to be taken in a tax return. The first step is to determine if the weight of available evidence indicates that it is more likely than not that the tax position will be sustained in an audit, including resolution of any related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. The Company recognizes interest and penalties related to uncertain tax positions in its provision for income taxes line in the accompanying Consolidated Statements of Operations.
In computing the tax benefit of stock-based compensation, the Company uses the direct method and the "with and without" method for utilization of tax attributes.
Comprehensive Income (Loss)
Comprehensive income (loss) consists of other comprehensive income (loss) and net loss. Other comprehensive income (loss) refers to revenue, expenses, gains and losses that under generally accepted accounting principles are recorded as an element of stockholders’ equity but are excluded from net loss. Other comprehensive income (loss) consists of foreign currency translation adjustments and unrealized gains and losses from short-term investments, net of tax.
Recent Accounting Pronouncements
In March 2013, the Financial Accounting Standards Board ("FASB") issued an accounting standard update requiring an entity to release into net income (loss) the entire amount of a cumulative translation adjustment related to its investment in a foreign entity when as a parent it either sells a part or all of its investment in the foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets within the foreign entity. This accounting standard update will be effective for the Company beginning in its first quarter of fiscal 2015. The Company is currently evaluating the impact of this accounting standard update on its Consolidated Financial Statements.
In July 2013, the FASB issued an accounting standard update that provides explicit guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists, with the purpose of reducing diversity in practice. This standard update requires the netting of unrecognized tax benefits against a deferred tax asset for a loss or other carryforward that would apply in settlement of the uncertain tax positions. This accounting standard update will be effective for the Company's fiscal 2015 and applied prospectively, with early adoption permitted. The Company is currently evaluating the impact of this accounting standard update on its Consolidated Financial Statements.
In April 2014, the FASB issued an accounting standard update that changes the criteria for reporting discontinued operations. This accounting standard raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of discontinued operation. Under the revised standard, a disposal of a component of an entity or a group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has, or will have, a major effect on an entity's operations and financial results when either it qualifies as held for sale, disposed of by sale, or disposed of other than by sale. This accounting standard will be effective for the Company beginning in its first quarter of fiscal 2016. The Company is currently evaluating the impact of this accounting standard update on its Consolidated Financial Statements.
In May 2014, the FASB issued an accounting standard update which provides for new revenue recognition guidance. The new standard supersedes nearly all existing revenue recognition guidance. The core principle of the new guidance is to recognize revenue when promised goods or services are transferred to customers, in an amount that reflects the consideration to which the vendor expects to receive for those goods or services. The new standard is expected to require more judgment and estimates within the revenue recognition process than required under existing U.S. GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to separate performance obligations. This accounting standard will be effective for the Company beginning in its first quarter of fiscal 2018, with no early adoption permitted, using one of two methods of adoption: (i) retrospective to each prior reporting period presented, with the option to elect certain practical expedients as defined within the standard; or (ii) retrospective with the cumulative effect of initially applying the standard recognized at the date of initial application inclusive of certain additional disclosures. The Company is currently evaluating the impact of this accounting standard update on its Consolidated Financial Statements.

Business_Combinations

Business Combinations	12 Months Ended
	Jul. 31, 2014
Business Combinations [Abstract]	'
Business Combinations	'
	Business Combinations
	Meridian Apps
	On May 13, 2013, the Company acquired Meridian Apps, Inc. ("Meridian"), a privately-held mobile-software company providing software for visitor engagement through indoor way-finding and targeted location-based messaging. As a result of this acquisition, the Company is offering indoor location-based services by combining its unique, network-based contextual information about users, devices and applications with Meridian's Wi-Fi based visitor engagement solution for smart phones and tablets.
	The results of operations of Meridian are included in the Company's Consolidated Statement of Operations from the date of acquisition. The Company does not consider the acquisition of Meridian to be material to the results of its operations or financial position, and therefore, the Company is not presenting pro-forma financial information of combined operations.
	The purchase price consideration was $16.8 million, consisting of cash. In addition, the Company is obligated to pay additional cash compensation of up to $10.2 million to certain former Meridian employees who became employees of the Company, which vests and is payable over a period of approximately three years from May 13, 2013, subject to continued employment. For fiscal 2014 and 2013, the Company recorded compensation expense of $3.5 million and $0.8 million, respectively, in research and development expenses associated with this additional cash compensation.
	The Company allocated the total purchase price consideration to the net assets acquired, including identifiable intangible assets, based on their respective fair values at the acquisition date. The excess purchase price over the fair value of the net assets acquired was recorded as goodwill, which is not expected to be deductible for income tax purposes. There are a number of factors contributing to the amount of goodwill, including Meridian's workforce and the expectation that its acquisition will create synergies, which will provide future value to the Company.
	The following table summarizes the allocation of the purchase price consideration:
			Amount			Estimated
						Useful Lives
			(in thousands)
	Tangible assets acquired and liabilities assumed		$	(1,218	)
	Amortizable intangible assets:
	Existing technology		5,000			3 years
	Patent		2,000			11 years
	Customer contracts and related relationships		300			4 years
	Trade name and trademarks		400			4 years
	Total net assets acquired		6,482
	Goodwill		10,295
	Purchase price consideration (cash)		$	16,777
	The Company expensed $0.1 million of acquisition-related costs incurred as general and administrative expenses in the Consolidated Statements of Operations in fiscal 2013.
	Avenda Systems
	On November 30, 2011, the Company acquired Avenda Systems (“Avenda”), a leading developer of network security solutions. The results of Avenda’s operations have been included in the Consolidated Financial Statements since the acquisition date. The tangible and intangible assets acquired and liabilities assumed were recorded at fair value on the acquisition date.
	The purchase price consideration in the transaction consisted of cash and stock as follows (in thousands, except share and per share data):
	Cash	$	23,475
	Stock (526,996 shares at $22.77 per share)	12,000
	Total purchase price consideration	$	35,475
	The purchase price was allocated to the assets acquired and liabilities assumed based on their respective fair values at the acquisition date. The excess of the purchase consideration over the fair value of the net assets acquired was allocated to goodwill. In part, goodwill reflects the benefits the Company expects to realize from the integration of Avenda's technology with its product architecture, making it simpler and more secure for enterprises to transition to mobile computing and cloud-based applications.
	The purchase price consideration in the transaction was allocated as follows (in thousands):
	Cash and cash equivalents		$	2,389
	Other assets		275
	Total tangible assets acquired		$	2,664
						Estimated
						Useful Lives
	Amortizable intangible assets:
	Existing technology		$	12,800		4 to 7 years
	Customer contracts		300			5 years
	Goodwill		23,604
	Total assets acquired		39,368
	Liabilities assumed		(1,784		)
	Deferred tax liability		(2,109		)
	Total purchase price consideration		$	35,475
	The Company expensed $0.1 million of acquisition-related costs incurred as general and administrative expenses in the Consolidated Statements of Operations in fiscal 2012.
	Other Acquisition
	On May 23, 2012, the Company acquired a software development company, to accelerate the Company’s ClearPass portfolio. Pursuant to the terms of the purchase agreement ("the Agreement"), the total purchase price consideration was approximately $1.4 million in cash, of which $0.3 million was placed in escrow to secure the Company’s indemnification rights under the Agreement.
	The purchase price consideration in the transaction was allocated as follows (in thousands):
						Estimated
						Useful Lives
	Amortizable intangible assets:
	Non-compete agreement		$	100		4 years
	In-process research and development		1,200
	Goodwill		200
	Total assets acquired		1,500
	Liabilities assumed		(81		)
	Total purchase price consideration		$	1,419
	A portion of the purchase price consideration was allocated to in-process research and development (“IPR&D”). IPR&D represents software that will accelerate the Company’s ClearPass portfolio. The IPR&D was identified and valued through an analysis of data provided by the wireless technology company concerning existing technologies, in-process technologies and future technologies. In addition, the Company agreed to an incremental cash payment and stock awards totaling approximately $4.0 million, subject to certain vesting conditions and continued employment. The incremental cash payment and stock awards have been recorded as compensation expense over the service period through November 2013.

Contingent_Rights_Liability

Contingent Rights Liability	12 Months Ended
	Jul. 31, 2014
Business Combinations [Abstract]	'
Contingent Rights Liability	'
	Contingent Rights Liability
	On September 2, 2010, the Company completed its acquisition of Azalea Networks ("Azalea") for a total purchase price consideration of $42.0 million. As part of the purchase consideration for each share of the Company received by the Azalea shareholders, each Azalea shareholder also received a right ("Contingent Rights") to receive an amount of cash equal to the shortfall generated if a share was sold below the target value within the payment period, as defined. At the acquisition date, the Company recorded a liability for the estimated fair value of the contingent rights of $9.5 million. The change in fair value of this contingent right was primarily driven by changes in the Company's common stock price. Gains and losses as a result of the revaluation of the contingent rights liability were included in other income (expense), net in the Consolidated Statements of Operations. For fiscal 2013 and fiscal 2012, the Company recorded in other income (expense), net, a valuation gain of $0.4 million and $2.3 million, respectively, related to the revaluation of the contingent rights liability. Additionally, in fiscal 2013, in connection with the expiration of the contingent rights liability, the Company recorded a gain of $1.3 million in other income (expense), net.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Jul. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	Goodwill and Intangible Assets
	The following table presents details of the Company’s goodwill:
		Amount
		(in thousands)
	As of July 31, 2012	$	56,947
	Goodwill acquired in acquisition of Meridian	10,295
	As of July 31, 2013	$	67,242
	Changes in goodwill	—
	As of July 31, 2014	$	67,242
	The following table presents details of the Company’s intangible assets:
		Estimated		Gross				Accumulated				Net
		Useful Lives		Value				Amortization				Value
		(in thousands, except estimated useful lives)
	As of July 31, 2014
	Existing technology	3 to 7 years		$	41,383			$	(29,196	)		$	12,187
	Patents/core technology	2 to 13 years		11,796				(5,881		)		5,915
	Customer contracts	4 to 7 years		7,533				(6,536		)		997
	Support agreements	5 to 6 years		2,917				(2,839		)		78
	Trade names/trademarks	1 to 5 years		1,150				(867		)		283
	Non-compete agreements	2 to 4 years		912				(867		)		45
	Total			$	65,691			$	(46,186	)		$	19,505
	In fiscal 2014, the Company purchased certain patents and entered into a perpetual patent license agreement, totaling $2.8 million, to support its product development strategy and research and development efforts.
		Estimated		Gross				Accumulated				Net
		Useful Lives		Value				Amortization				Value
		(in thousands, except estimated useful lives)
	As of July 31, 2013
	Existing technology	3 to 7 years		$	41,383			$	(21,269	)		$	20,114
	Patents/core technology	2 to 11 years		9,046				(4,784		)		4,262
	Customer contracts	4 to 7 years		7,533				(5,537		)		1,996
	Support agreements	5 to 6 years		2,917				(2,805		)		112
	Trade names/trademarks	1 to 5 years		1,150				(767		)		383
	Non-compete agreements	2 to 4 years		912				(842		)		70
	Total			$	62,941			$	(36,004	)		$	26,937
	IPR&D is accounted for as an indefinite-lived intangible asset until completion or abandonment of the associated research and development efforts. During fiscal 2013, the Company completed the development projects and transferred $1.4 million IPR&D costs to the existing technology category. The Company did not have outstanding IPR&D as of July 31, 2014 and July 31, 2013.
	Intangible assets amortization expense is recorded in the Consolidated Statements of Operations as follows:
		Years ended July 31,
		2014				2013				2012
		(in thousands)
	Cost of product revenues	$	9,021			$	6,080			$	5,875
	Cost of support and professional services revenues	—				284				540
	Sales and marketing	1,132				1,410				1,812
	Research and development	24				25				—
	General and administrative	5				—				—
	Total amortization expense	$	10,182			$	7,799			$	8,227
	The following table presents the estimated future amortization expense of intangible assets as of July 31, 2014:
		Amount
		(in thousands)
	Years ending July 31,
	2015	$	8,423
	2016	4,585
	2017	1,774
	2018	1,521
	2019	787
	Thereafter	2,415
	Total	$	19,505

Net_Loss_Per_Common_Share

Net Loss Per Common Share	12 Months Ended
	Jul. 31, 2014
Earnings Per Share [Abstract]	'
Net Loss Per Common Share	'
	Net Loss Per Common Share
	Basic and diluted net loss per common share is calculated by dividing net loss by the weighted-average shares of common stock outstanding during the period. The Company's potentially diluted shares, including stock options, restricted stock units and other awards, are not included when their effect is antidilutive.
	The following tables set forth the computation of basic and diluted net loss per share:
		Years ended July 31,
		2014				2013			2012
		(in thousands, except per share data)
	Net loss	$	(28,965	)		$	(31,608	)	$	(8,851	)
	Weighted-average common shares outstanding, basic	108,443				113,284			108,774
	Dilutive effect of potential common shares	—				—			—
	Weighted-average common shares outstanding, diluted	108,443				113,284			108,774
	Net loss per share, basic	$	(0.27	)		$	(0.28	)	$	(0.08	)
	Net loss per share, diluted	$	(0.27	)		$	(0.28	)	$	(0.08	)
	The following table presents the potential common shares outstanding that were excluded from the computation of basic and diluted net loss per share for the periods presented, because including them would have had an anti-dilutive effect:
		As of July 31, 2014
		2014			2013			2012
		(in thousands)
	Options to purchase common stock	7,138			10,048			13,264
	Restricted stock awards	8,890			10,788			8,423
	Contingently issuable shares	629			680			591
	Employee stock purchase plan	111			180			—

ShortTerm_Investments

Short-Term Investments	12 Months Ended
	Jul. 31, 2014
Short-term Investments [Abstract]	'
Short-Term Investments	'
	Short-Term Investments
	Short-term investments consist of the following:
		Cost Basis		Gross			Gross			Fair Value
				Unrealized			Unrealized
				Gains			Losses
		(in thousands)
	As of July 31, 2014
	Corporate bonds	$	54,969	$	79		$	(15	)	$	55,033
	U.S. government agency securities	90,681		17			(58		)	90,640
	U.S. treasury bills	14,560		17			—			14,577
	Commercial paper	4,587		4			—			4,591
	Municipal notes and bonds	1,518		—			—			1,518
	Total short-term investments	$	166,315	$	117		$	(73	)	$	166,359
		Cost Basis		Gross			Gross			Fair Value
				Unrealized			Unrealized
				Gains			Losses
		(in thousands)
	As of July 31, 2013
	Corporate bonds	$	79,493	$	29		$	(97	)	$	79,425
	U.S. government agency securities	133,794		43			(11		)	133,826
	U.S. treasury bills	36,317		39			—			36,356
	Commercial paper	13,672		3			—			13,675
	Certificates of deposit	5,000		10			—			5,010
	Municipal notes and bonds	1,590		—			—			1,590
	Total short-term investments	$	269,866	$	124		$	(108	)	$	269,882
	The cost basis and fair value of the short-term investments by contractual maturity consist of the following:
		Cost		Fair
		Basis		Value
		(in thousands)
	As of July 31, 2014
	One year or less	$	110,184	$	110,280
	Over one year and less than two years	56,131		56,079
	Total short-term investments	$	166,315	$	166,359
		Cost		Fair
		Basis		Value
		(in thousands)
	As of July 31, 2013
	One year or less	$	165,614	$	165,682
	Over one year and less than two years	104,252		104,200
	Total short-term investments	$	269,866	$	269,882
	The Company reviews the individual securities in its portfolio to determine whether a decline in a security’s fair value below the amortized cost basis is other-than-temporary. The Company determined that as of July 31, 2014 and July 31, 2013 there were no investments in its portfolio that were other-than-temporarily impaired.
	The following table summarizes the fair value and gross unrealized losses of the Company’s investments with unrealized losses aggregated by type of investment instrument and the length of time that individual securities have been in a continuous unrealized loss position:
		Less than 12 Months
		Fair		Unrealized
		Value		Loss
		(in thousands)
	As of July 31, 2014
	Corporate bonds	$	14,101	$	(15	)
	U.S. government agency securities	57,566		(58		)
		$	71,667	$	(73	)
		Less than 12 Months
		Fair		Unrealized
		Value		Loss
		(in thousands)
	As of July 31, 2013
	Corporate bonds	$	51,850	$	(97	)
	U.S. government agency securities	26,611		(11		)
		$	78,461	$	(108	)
	As of July 31, 2014 and July 31, 2013, no securities were in a continuous unrealized loss position for more than twelve months.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Jul. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	Fair value is defined as the price that would be received upon the sale of an asset or paid to transfer a liability between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be either recorded or disclosed at fair value, the Company considers the principal or most advantageous market in which it would transact, and it also considers assumptions that market participants would use when pricing the asset or liability. Short-term investments are recorded at fair value.
	The Company determines the fair values of its financial instruments based on a three-level fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into three levels that may be used to measure fair value:
	Level 1 — Quoted prices in active markets for identical assets or liabilities.
	Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument.
	Level 3 — Unobservable inputs that are supported by little or no market activity and are significant to the fair value of the assets or liabilities and reflect the Company's own assumptions in measuring fair value.
	Level 1 instruments are valued based on quoted market prices in active markets for identical instruments. Level 1 instruments consist primarily of bank deposits with third-party financial institutions and highly liquid money market securities with original maturities at date of purchase of 90 days or less and are stated at cost, which approximates fair value.
	Level 2 securities are valued using quoted market prices for similar instruments, non-binding market prices that are corroborated by observable market data, or discounted cash flow techniques, and consist primarily of certain corporate bonds, U.S. government agency securities, U.S. treasury bills, commercial paper, municipal notes, and bonds.
	Level 3 instruments are valued based on unobservable inputs that are supported by little or no market activity and reflect the Company's own assumptions in measuring fair value. The Company classified its contingent rights liability as a Level 3 liability. The fair value of this liability was estimated using a lattice model and was based on significant inputs not observable in the market and thus represented a Level 3 instrument. The inputs include stock price as of the valuation date, strike price of the contingent right, maximum payoff per share, number of shares held in escrow, exercise period, historical volatility of the Company's stock price based on weekly stock price returns, and risk-free interest rate interpolated from the Constant Maturity Treasury Rate. This contingent rights liability expired on December 31, 2012. See Note 3, Contingent Rights Liability Arising from Business Combinations.
	As of July 31, 2014 and July 31, 2013, the Company had no investments valued as Level 3 instruments.
	There were no transfers between levels during fiscal 2014 and 2013.
	The fair value measurements of the Company’s cash, cash equivalents and short-term investments consisted of the following:
		Level 1			Level 2		Level 3		Total
		(in thousands)
	As of July 31, 2014
	Assets
	Cash and cash equivalents:
	Cash deposits with third-party financial institutions	$	113,303		$	—	$	—	$	113,303
	Money market funds	2,291			—		—		2,291
	Commercial paper	—			3,000		—		3,000
	Short-term investments:
	Corporate bonds	—			55,033		—		55,033
	U.S. government agency securities	—			90,640		—		90,640
	U.S. treasury bills	—			14,577		—		14,577
	Commercial paper	—			4,591		—		4,591
	Municipal notes and bonds	—			1,518		—		1,518
	Total assets measured and recorded at fair value	$	115,594		$	169,359	$	—	$	284,953
		Level 1			Level 2		Level 3		Total
		(in thousands)
	As of July 31, 2013
	Assets
	Cash and cash equivalents:
	Cash deposits with third-party financial institutions	$	129,290		$	—	$	—	$	129,290
	Money market funds	8,612			—		—		8,612
	U.S. government agency securities	3,017			—		—		3,017
	Commercial paper	4,000			—		—		4,000
	Short-term investments:
	Certificates of deposit	5,010			—		—		5,010
	Corporate bonds	—			79,424		—		79,424
	U.S. government agency securities	—			133,827		—		133,827
	U.S. treasury bills	—			36,355		—		36,355
	Commercial paper	—			13,676		—		13,676
	Municipal notes and bonds	—			1,590		—		1,590
	Total assets measured and recorded at fair value	$	149,929		$	264,872	$	—	$	414,801
	The following table reflects the change in valuation of the Company's contingent rights liability related to the Azalea acquisition:
		Level 3
		(in thousands)
	As of July 31, 2012	$	1,665
	Changes in fair value	(401		)
	Release of liability upon expiration of the rights	(1,264		)
	As of July 31, 2013	$	—
	The change in fair value of this contingent right was primarily driven by changes in the Company's common stock price. Gains and losses as a result of the revaluation of the contingent rights liability were included in other income (expense), net in the Consolidated Statements of Operations. For fiscal 2013 and fiscal 2012, the Company recorded in other income (expense), net a valuation gain of $0.4 million and $2.3 million, respectively, related to the revaluation of the contingent rights liability. Additionally, in fiscal 2013, in connection with the expiration of the contingent rights liability, the Company recorded a gain of $1.3 million in other income (expense), net. See Note 3, Contingent Rights Liability, of Notes to the Consolidated Financial Statements.
	Other Investments
	As of July 31, 2014, the Company has investments in privately-held companies of $1.8 million, which are included in other non-current assets in the accompanying Consolidated Balance Sheets. These investments are recorded at cost and are adjusted to fair value in the event that they become other-than-temporarily impaired. There have been no impairments to these investments recorded in any of the periods presented.

Balance_Sheet_Components

Balance Sheet Components	12 Months Ended
	Jul. 31, 2014
Balance Sheet Components [Abstract]	'
Balance Sheet Components	'
	Balance Sheet Components
	The following tables provide details of selected balance sheet items:
		July 31,				July 31,
		2014				2013
		(in thousands)
	Inventory, net
	Raw materials	$	348			$	288
	Finished goods	39,488				28,607
	Total	$	39,836			$	28,895
		Estimated		July 31,				July 31,
		Useful Lives		2014				2013
		(in thousands, except estimated useful lives)
	Property and Equipment, net
	Computer equipment	2 to 5 years		$	25,779			$	23,109
	Computer software	2 to 5 years		16,675				13,525
	Machinery and equipment	2 to 5 years		36,500				29,009
	Furniture and fixtures	2 to 5 years		4,756				4,304
	Leasehold improvements	1 to 6 years		8,128				5,892
	Total property and equipment, gross			91,838				75,839
	Less: accumulated depreciation and amortization			(64,577		)		(48,303		)
	Total property and equipment, net			$	27,261			$	27,536
	Depreciation and amortization expense for property and equipment, net was $19.3 million, $15.9 million and $10.9 million for fiscal 2014, 2013 and 2012, respectively.
		July 31,				July 31,
		2014				2013
		(in thousands)
	Accrued Liabilities
	Compensation and benefits	$	37,737			$	25,214
	Marketing	24,782				41,014
	Litigation reserves	250				14,125
	Other	16,722				14,279
	Total	$	79,491			$	94,632
		July 31,				July 31,
		2014				2013
		(in thousands)
	Deferred Revenue
	Product	$	50,678			$	38,974
	Support and professional services	84,482				70,791
	Total deferred revenue, current	135,160				109,765
	Product, non-current	3,497				—
	Support and professional services, non-current	41,480				31,578
	Total deferred revenue, non-current	44,977				31,578
	Total deferred revenue	$	180,137			$	141,343
	Deferred product revenue relates to arrangements where not all revenue recognition criteria have been met. Deferred support and professional services revenue primarily represents customer payments made in advance for support contracts. Support contracts are typically billed on an annual basis in advance and revenue is recognized ratably over the support period, typically one to five years.
	Non-current product deferred revenue relates to software products sold as part of a multiple-element arrangement for which VSOE had not been established. Revenue for these software products is recognized ratably over the related support period.

Income_Taxes

Income Taxes	12 Months Ended
	Jul. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	Income (loss) before provision for income taxes consists of the following:
		Years ended July 31,
		2014				2013				2012
		(in thousands)
	Domestic	$	6,670			$	(9,807	)		$	54,116
	International	(6,265		)		(418		)		(40,556		)
	Income (loss) before income taxes	$	405			$	(10,225	)		$	13,560
	The provision for income taxes consists of the following:
		Years ended July 31,
		2014				2013				2012
		(in thousands)
	Current
	Federal	$	26,677			$	16,534			$	2,499
	State	2,017				1,876				3,670
	Foreign	4,450				3,210				2,688
	Total current provision for income taxes	33,144				21,620				8,857
	Deferred
	Federal	(3,484		)		(4,087		)		17,508
	State	(242		)		2,788				(3,563		)
	Foreign	(48		)		1,062				(391		)
	Total deferred provision for income taxes	(3,774		)		(237		)		13,554
	Total provision for income taxes	$	29,370			$	21,383			$	22,411
	The differences between the provision for income taxes computed at the federal statutory rate and the provision for income taxes are as follows:
		Years ended July 31,
		2014			2013			2012
	Federal statutory rate	35	%		(35.0	)%		35	%
	State taxes, net of federal benefit	330.2	%		14	%		3.4	%
	Non-deductible meals and entertainment	69.4	%		2	%		1.9	%
	Change in state effective rate	(66.1	)%		(3.9	)%		(2.9	)%
	IP structure charges, net of tax capitalized	—	%		—	%		75.9	%
	Amortization of deferred tax charge on IP restructuring	1,984.50	%		74.8	%		55.2	%
	Foreign income at other than U.S. rate	2,391.90	%		56	%		(3.0	)%
	Non-deductible stock-based compensation	2,415.90	%		104.8	%		33.6	%
	Non-deductible acquisition-related expenses	272.4	%		2.7	%		0.2	%
	Research and developments credits	(700.1	)%		(53.5	)%		(33.0	)%
	Change in valuation allowance	518.8	%		47.2	%		(1.0	)%
	Effective tax rate	7,251.90	%		209.1	%		165.3	%
	During the second quarter of fiscal 2013, Congress extended the U.S. research and development credit retroactively to January 1, 2012. The tax provision for fiscal 2013 includes a tax benefit for this credit of approximately $1.9 million relating to fiscal 2012. For fiscal 2014, the Company’s U.S. research and development credit decreased as Congress did not enact legislation to extend the U.S. research and development credit on December 31, 2013 and therefore, the qualified research expenditures that occurred after December 31, 2013 were not factored into the credit.
	Intellectual property ("IP") structure charges consist primarily of non-recurring gains recognized in the United States related to the international restructuring of the Company's corporate organization during fiscal 2012, including the transfer of certain IP and inventory overseas. The “Amortization of deferred tax charge on IP restructuring” consists of taxes paid that result from intra-entity transfers and that are deferred and amortized for financial reporting purposes under Accounting Standards Codification (“ASC”) 740-10-25-3(e), Income Taxes, and ASC 810-10-45-8, Consolidation. For fiscal 2014 and 2013, the corporate reorganization resulted in an increase to the effective tax rate due to the non-recurring gains triggered in the United States related to the reorganization as described above. While the Company has yet to realize any tax savings to date, the Company expects to realize a reduction in its effective tax rate as a result of its corporate reorganization after the deferred charges have been fully amortized.
	Excess tax benefits associated with stock-based compensation deductions are credited to stockholders' equity. The reduction of income taxes payable resulting from stock-based compensation deductions that were credited to stockholders' equity were approximately $18.8 million for fiscal 2014, $9.9 million for fiscal 2013, and $21.6 million for fiscal 2012. Related amounts reflected in the Consolidated Statements of Stockholders' Equity include the tax effect of any adjustments in the deferred tax asset for stock-based compensation when the tax benefit realized is less than the deferred tax asset.
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts for income tax purposes. Significant components of our deferred tax assets and liabilities are as follows:
		As of July 31,
		2014				2013
		(in thousands)
	Deferred tax assets
	Current
	Net operating loss carryforwards	$	677			$	1,187
	Research and development credits	—				615
	Stock-based compensation	11,109				10,271
	Accruals and reserves	14,249				17,131
	Total deferred tax assets, current	26,035				29,204
	Valuation allowance	(348		)		(128		)
	Net deferred tax assets, current	25,687				29,076
	Non-current
	Net operating loss carryforwards	2,209				2,848
	Research and development credits	14,479				12,378
	Depreciation and amortization	1,782				—
	Stock-based compensation	8,736				9,423
	Accruals and reserves	4,037				3,030
	Total deferred tax assets, non-current	31,243				27,679
	Valuation allowance	(6,480		)		(4,599		)
	Net deferred tax assets, non-current	24,763				23,080
Total deferred tax assets, net	50,450				52,156
Deferred tax liabilities
Current
Unrealized loss in other comprehensive income	(11		)		—
Total deferred tax liabilities, current	(11		)		—
Non-current
Depreciation and amortization	(801		)		(3,292		)
Total deferred tax liabilities, non-current	(801		)		(3,292		)
Total deferred tax liabilities, net	(812		)		(3,292		)
Total deferred tax assets (liabilities), net	$	49,638			$	48,864
Each fiscal quarter, the Company assesses the likelihood that it will be able to recover its deferred tax assets. The Company will reduce a deferred tax asset by a valuation allowance if it is "more likely than not" that some portion or all of the deferred tax asset will not be realized. A deferred tax asset is recorded when there is a future deductible amount, but a valuation allowance is needed if taxable income is anticipated to be insufficient to realize the future deductible amount. The Company considers available evidence, both positive and negative, including historical levels of income, expectations and risks associated with estimates of future taxable income, and ongoing prudent and feasible tax planning strategies in assessing the need for the valuation allowance. The Company believes that its California tax research credit carryforwards are not more likely than not to be realized. As a result, in fiscal 2013, the Company recorded a partial valuation allowance on certain California tax research credit carryforwards generated in fiscal years before 2013. A full valuation allowance was recorded on credits earned in fiscal 2014 and 2013. The Company recorded an increase in the valuation allowance of $2.0 million relating to California tax research credits earned in fiscal 2014. It is reasonably possible that a material increase in the valuation allowance could occur in the future depending on changes, if any, in the mix of earnings in the jurisdictions in which the Company operates, the percentage of revenue from California customers, the Company's evaluation of prudent and feasible tax planning strategies, the Company's expectation of exercising elections available under the applicable tax laws, and the Company's projections of the future growth and forecasted earnings. An increase to the valuation allowance would have the effect of increasing the income tax provision in the Consolidated Statements of Operations.
As of July 31, 2014, the Company's federal net operating loss carryforwards for income tax purposes were approximately $131 million with expiration dates starting in 2028. As of July 31, 2014, the Company’s state net operating loss carryforwards for income tax purposes were also approximately $131 million with expiration dates starting in 2015. Utilization of a portion of the net operating losses is subject to annual limitation. The annual limitation may result in the expiration of a portion of the net operating losses before utilization. If these net operating loss carryforwards are realized, a tax benefit of approximately $47.8 million will be recorded to paid in capital. The Company uses the “with and without” approach to determine the amount of excess tax benefits to be credited to equity. The Company only considers the direct impact of awards when calculating the amount of windfalls or shortfalls.
As of July 31, 2014, the Company's federal and state research credit carryforwards for income tax purposes were approximately $22.8 million and $28.7 million, respectively. The federal credits expire at various dates beginning in year 2023 through year 2034. The state credits can be carried forward indefinitely.
As of July 31, 2014, approximately $23.4 million of undistributed earnings from the Company's foreign subsidiaries have been excluded from the U.S. tax provision and the U.S. deferred tax liability, as the Company intends to permanently reinvest these earnings outside the United States. If these earnings were distributed to the United States in the form of dividends or otherwise, the Company could be subject to additional U.S. income taxes (subject to an adjustment for foreign tax credits) and foreign withholding taxes. Most of these undistributed earnings are from jurisdictions where the company has tax basis in excess of book basis and would not result in a deferred tax liability as of July 31, 2014. To the extent there may be an impact on the remaining earnings, a determination of the amount of unrecognized deferred tax liability is not practicable.
The aggregate changes in the balance of gross unrecognized tax benefits were as follows:
	Years ended July 31,
	2014				2013				2012
Beginning gross unrecognized tax benefits	$	17,434			$	12,077			$	10,868
Additions for tax positions related to current year	4,447				5,523				7,444
Additions for tax positions related to prior year	266				—				—
Reductions for tax positions related to prior year	—				(166		)		(6,235		)
Ending gross unrecognized tax benefits	$	22,147			$	17,434			$	12,077
As of July 31, 2014, the Company had $22.1 million of unrecognized tax benefits, which, if recognized, would affect the Company's income tax expense. The Company recognizes interest and penalties related to income tax matters as part of the provision for income taxes. To date, these charges have been immaterial.
The Company believes that it is reasonably possible that unrecognized tax benefits will not increase or decrease significantly over the next 12 months. The Company files income tax returns in the U.S. federal jurisdiction, various U.S. state and local jurisdictions, and in various foreign jurisdictions. Due to the Company's net operating loss and credit carryforwards, substantially all years are subject to examination.

Equity_Incentive_Plans_and_Ben

Equity Incentive Plans and Benefit Plans	12 Months Ended
	Jul. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Equity Incentive Plans and Benefit Plans	'
	Equity Incentive Plans and Benefit Plans
	In April 2002, the Company’s board of directors approved the 2002 Stock Plan (the “2002 Plan”). In December 2006, the Company’s board of directors approved the 2007 Equity Incentive Plan (the “2007 Plan”) and the Employee Stock Purchase Plan (“ESPP"). Upon the closing of the IPO, all of the remaining shares reserved for issuance under the 2002 Plan were transferred to the 2007 Plan.
	The 2007 Plan provides for annual increases in the number of shares available for issuance equal to the lesser of:
	•	5% of the outstanding shares of the Company’s common stock on the last day of the immediately preceding fiscal year; or
	•	15,000,000 shares.
	In December 2009, the Compensation Committee of the Board of Directors approved the Executive Officer Bonus Plan and the Corporate Bonus Plan, which have subsequently been amended in fiscal 2011 and fiscal 2012 (the “Bonus Plans”). The Bonus Plans offer the Company’s executive officers and employees (the “participants”) the opportunity to earn stock bonuses, or cash for employees in certain countries, based on certain performance criteria set forth in the Bonus Plans associated with revenue and operating income over the respective 6-month performance periods. Based on the probability assessment at each of the period-ends, the bonus accrual is classified as a liability until the number of shares is determined on the date the awards are granted, at which time the Company classifies the awards into equity. The Company recorded stock-based compensation expense related to the Bonus Plans of $22.0 million, $13.1 million and $8.1 million in fiscal 2014, 2013 and 2012 respectively.
	Stock Option Activity
	The following table summarizes the information about shares available for grant and outstanding stock option activity:
					Options Outstanding
		Shares			Number of			Weighted				Weighted		Weighted	Aggregate
		Available for			Shares			Average				Average		Average	Intrinsic
		Grant						Exercise				Fair Value		Remaining	Value (1)
								Price				per Share		Contractual
								per Share						Term (Years)
															(in thousands)
	As of July 31, 2011	274,103			18,164,944			$	6.59					5	$	297,688
	Shares reserved for issuance	5,245,243			—
	Restricted stock awards granted	(7,713,936	)		—
	Restricted stock awards forfeited	1,579,751			—
	Options granted	(177,568	)		177,568			23.71				$	13.08
	Options exercised	—			(3,753,478	)		5.71							$	56,579
	Options cancelled	1,325,003			(1,325,003	)		10.87
	As of July 31, 2012	532,596			13,264,031			$	6.63					3.9	$	112,868
	Shares reserved for issuance	5,576,433			—
	Restricted stock awards granted	(7,252,248	)		—
	Restricted stock awards forfeited	1,393,834			—
	Options exercised	—			(2,860,592	)		6.71							$	38,697
	Options cancelled	306,970			(355,870	)		14.94
	As of July 31, 2013	557,585			10,047,569			$	6.29					2.9	$	121,227
	Shares reserved for issuance	5,670,469
	Restricted stock awards granted	(4,350,155	)
	Restricted stock awards forfeited	1,238,196
	Options exercised	—			(2,778,312	)		3.73							$	42,871
	Options cancelled	131,142			(131,142	)		19.98
	As of July 31, 2014	3,247,237			7,138,115			$	7.03					2	$	82,533
	Options vested and expected to vest as of July 31, 2014 (2)				7,133,364			$	7.02					2	$	82,533
	Options exercisable as of July 31, 2014				7,011,132			$	6.73					2	$	82,529
	-1	The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the fair value of the Company’s common stock on the date of each option exercise.
	-2	Options expected to vest are the result of applying the pre-vesting forfeiture rate assumption to total outstanding options.
	Incentive and nonstatutory stock options issued under the 2007 Plan are issued with an exercise price equal to the market value of the Company’s common stock on the date of grant. Options generally vest over a four-year period and generally expire in seven years, but no later than ten years.
	As of July 31, 2014, $1.3 million of total unrecognized compensation cost, net of forfeitures, related to non-vested stock options is expected to be recognized over a weighted-average period of 0.7 years.
	Restricted Stock Award Activity
	The following table summarizes the non-vested restricted stock awards and units:
		Shares			Weighted Average
					Grant Date
					Fair Value
					per Share
	As of July 31, 2011	5,093,839			$	20.98
	Awards granted	7,713,936			19.34
	Awards vested	(2,805,343	)		20.29
	Awards forfeited	(1,579,751	)		22.15
	As of July 31, 2012	8,422,681			$	19.49
	Awards granted	7,252,248			18.76
	Awards vested	(3,493,341	)		19.51
	Awards forfeited	(1,393,834	)		20.44
	As of July 31, 2013	10,787,754			$	18.87
	Awards granted	4,350,155			18.67
	Awards vested	(5,009,273	)		19.07
	Awards forfeited	(1,238,196	)		19.28
	As of July 31, 2014	8,890,440			$	18.61
	Restricted stock units and awards are granted under the 2007 Plan. Restricted stock awards are shares of common stock that vest and restricted stock units are awards that will result in a payment if performance goals are achieved or the awards otherwise vest. The terms and conditions of these awards are established by the plan administrator.
	The estimated fair value of restricted stock awards is based on the market price of the Company’s common stock on the grant date. The total fair value of the awards granted during fiscal 2014, 2013 and 2012 was $81.2 million, $136.1 million and $149.2 million, respectively. As of July 31, 2014, $118.9 million of total unrecognized stock-based compensation cost, net of forfeitures, related to non-vested restricted stock awards is expected to be recognized over a weighted-average period of 2.4 years.
	Employee Stock Purchase Plan
Under the ESPP, the Company can grant stock purchase rights to all eligible employees during a two-year offering period with purchase dates at the end of each six-month purchase periods. Shares are purchased through employees’ payroll deductions, up to a maximum of 15% of employees’ compensation for each purchase period, at purchase prices equal to 85% of the lesser of the fair market value of the Company’s common stock at the first trading day of the applicable offering period or the purchase date. No participant may purchase more than $25,000 worth of common stock or 3,000 shares of common stock in any one calendar year period. The ESPP is compensatory and results in compensation expense. A total of 5,868,790 shares of common stock have been reserved for future issuance under the ESPP as of July 31, 2014.
The following table shows for each purchase date, the shares issued and the weighted average purchase price per share:
Purchase date	September 1, 2012
Shares issued	348,520
Weighted average purchase price per share	$	16.65
Purchase date	March 1, 2013
Shares issued	489,587
Weighted average purchase price per share	$	16.74
Purchase date	September 1, 2013
Shares issued	432,749
Weighted average purchase price per share	$	14.12
Purchase date	March 1, 2014
Shares issued	656,448
Weighted average purchase price per share	$	14.12
Fair Value Disclosures
There were no stock options granted during fiscal 2014 and 2013.
The total fair value of options and share awards vested in each of the fiscal 2014, 2013 and 2012, was $105.2 million, $78.6 million and $75.9 million, respectively. The fair value of each option grant is estimated on the date of grant using the Black-Scholes model with the following weighted average assumptions:
Employee Stock Options
There were no stock options granted during fiscal 2014 and 2013. For fiscal 2012, the fair value of each option grant is estimated on the date of grant using the Black-Scholes model with the following weighted average assumptions:
	Year ended July 31,
	2012
Risk-free interest rate	1.20%
Expected term (in years)	4
Dividend yield	0.00%
Volatility	74.00%
Employee Stock Purchase Plan
The fair value of the purchase right for the Employee Stock Purchase Plan is estimated on the date of grant using the Black-Scholes model with the following weighted average assumptions:
	Years ended July 31,
	2014		2013		2012
Risk-free interest rates	0.1% to 0.4%		0.1% to 0.3%		0.1% to 0.3%
Expected term (in years)	0.5 to 2.0		0.5 to 2.0		0.5 to 2.0
Dividend yield	—%		—%		—%
Volatility	39.1% to 64.4%		53.8% to 63.0%		56.0% to 77.0%
The expected term of the stock-based awards represents the period of time that the Company expects such stock-based awards to be outstanding, giving consideration to the contractual term of the awards, vesting schedules and expectations of future employee behavior. The Company gave consideration to its historical exercises, the vesting term of its stock options, the post vesting cancellation history of its stock options and the stock options’ contractual terms. The Company computes expected volatility based on its own historical volatility. The Company estimates expected forfeitures based on historical experience of forfeitures, and is recognizing stock-based compensation expense only for those equity awards that it expects to vest. The risk-free interest rate for the expected term of the option is based on the U.S. Treasury Constant Maturity rate as of the date of grant.
Stock-based Compensation Expense
The following table presents stock-based compensation expense by award-type:
	Years ended July 31,
	2014				2013				2012
	(in thousands)
Stock options	$	5,014			$	9,648			$	16,879
Stock awards	97,021				77,064				58,877
Employee stock purchase plan	9,146				9,514				8,156
Total	$	111,181			$	96,226			$	83,912
The amount of capitalized stock-based compensation during fiscal 2014, 2013 and 2012 was immaterial.
401(k) Defined Contribution Plan
The Company sponsors a 401(k) defined contribution plan covering all employees. Matching contributions to the plan are at the discretion of the Company. To date, there have been no employer contributions under this plan.
Stock Repurchase Program
As of July 31, 2014, the Company's Board of Directors had authorized a stock repurchase program for an aggregate amount of up to $500.0 million, consisting of an original $100.0 million authorization on June 13, 2012, plus subsequent authorizations of $100.0 million on July 15, 2013, $100.0 million on October 9, 2013, and $200.0 million on February 20, 2014. The Company is authorized to make repurchases in the market until the Board of Directors terminates the program or until such repurchases reach the authorized amount, whichever occurs first. Any repurchases under the program will be funded either from available working capital or external financing. The number of shares repurchased and the timing of repurchases are based on the price of the Company's common stock, general business and market conditions, and other investment considerations. Shares are retired upon repurchase. The Company's policy related to repurchases of its common stock is to charge any excess of cost over par value entirely to additional paid-in capital. During fiscal 2014 and 2013, the Company repurchased a total of 14,729,540 shares and 5,311,332 shares, respectively, for a total of purchase price of $263.0 million and $86.2 million, respectively. At July 31, 2014, $130.9 million remains authorized for repurchase under the stock repurchase program.

Segment_Information_and_Signif

Segment Information and Significant Customers	12 Months Ended
	Jul. 31, 2014
Segment Reporting [Abstract]	'
Segment Information and Significant Customers	'
	Segment Information and Significant Customers
	The Company operates as one reportable and operating segment. The Company derives its revenue primarily from sales of Mobility Controllers with ArubaOS operating system software, controller-less and controller-managed wireless access points, Mobility Access Switches, value-added security software modules, access management system solutions, multi-vendor management solution software, mobility management solution and other software, and support and professional services.
	A reportable segment is defined as a component of an enterprise for which separate financial information is available and is evaluated regularly by the chief operating decision maker ("CODM"), or decision making group, for resource allocation and for assessing performance. The Company’s CODM is its chief executive officer, who reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The Company operates as a single reportable and operating segment. Revenue is attributed by geographic location based on the ship-to location of the Company’s customers.
	The following table presents total revenue by geographic region:
		Years ended July 31,
		2014				2013				2012
		(in thousands)
	United States	$	476,114			$	379,447			$	323,331
	Europe, Middle East and Africa	132,847				106,427				89,540
	Asia Pacific	102,666				94,361				89,677
	Rest of World	17,306				19,809				14,221
	Total	$	728,933			$	600,044			$	516,769
	The Company’s product revenue was $595.4 million, $496.3 million and $434.7 million for fiscal 2014, 2013 and 2012, respectively. Support and professional services revenue was $133.6 million, $103.7 million and $82.0 million in the same periods.
	The following table presents significant channel partners contributing revenue in excess of 10% of total revenue:
		Years ended July 31,
		2014			2013			2012
	ScanSource, Inc. (“Catalyst”)	20.5	%		20.8	%		21.4	%
	Synnex Corp.	13.2	%		11.6	%		*
	Avnet Logistics U.S. LP	*			*			14.1	%
	(*) Indicates less than 10%.
	The following table presents significant channel partners as a percentage of total accounts receivable, net:
		July 31,			July 31,
		2014			2013
	ScanSource, Inc. (“Catalyst”)	17.2	%		21.4	%
	Synnex Corp.	11.8	%		12.1	%
	Avnet Logistics U.S. LP	15.3	%		13.1	%
	Dell Inc.	11.5	%		*
	(*) Indicates less than 10%.
	The following table sets forth the Company's property and equipment, net by geographic region based on the location of the asset:
			July 31,				July 31,
			2014				2013
			(in thousands)
	United States		$	18,242			$	19,291
	All other countries		9,019				8,245
	Total		$	27,261			$	27,536

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Jul. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Legal Matters
	The Company is involved in disputes, claims, litigation, investigations, proceedings and other legal actions, consisting of intellectual property, commercial, securities, and employment matters from time to time that arise in the ordinary course of business, including the legal matters identified below.
	U.S. Federal Court Class Action Litigation. On May 23, 2013, a purported stockholder class action lawsuit captioned Mazzafero v. Aruba Networks, Inc., et al., was filed in the United States District Court for the Northern District of California against the Company and certain of its officers. The purported class action alleges claims for violations of the federal securities laws, and seeks unspecified compensatory damages and other relief. The Company believes that it has meritorious defenses to these claims and intends to defend the litigation vigorously. On August 1, 2014, the Court dismissed the case but granted leave to amend. Based on information currently available, the Company has determined that the amount of any possible loss or range of possible loss is not reasonably estimable.
	Nomadix, Inc v. Hewlett Packard Company et al. In November 2009, Nomadix, Inc. filed a lawsuit against multiple defendants including Aruba Networks. The suit was filed in the United States District Court for the Central District of California. The plaintiff claimed that the defendants infringed several of their patents; however, only one patent was asserted against Aruba, U.S. Patent No. 6,636,894. On July 30, 2013, the Company and Nomadix reached a settlement. As part of the settlement, the Company agreed to pay Nomadix an amount in consideration for a perpetual non-exclusive license for Nomadix' patent, among other things. The Company determined there would be no material benefit from the acquired patent, thus the settlement was recorded as an operating expense in the fourth quarter of fiscal 2013. The terms of the settlement are confidential. Although the settlement did have a material impact to the Company's Consolidated Statements of Operations, it did not have a material adverse effect on the Company's consolidated financial position or cash flows for fiscal 2013.
	The Company reviews all legal matters at least quarterly and assesses whether an accrual for loss contingencies needs to be recorded. The assessment reflects the impact of negotiations, settlements, rulings, advice of legal counsel, and other information and events pertaining to a particular case. The Company records an accrual for loss contingencies when management believes that it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Legal matters are subject to uncertainties and are inherently unpredictable; however, the Company believes that it has valid defenses with respect to its pending legal matters. Actual liability in any such matters may be materially different from the Company's estimates, which could result in the need to adjust the liability and record additional expenses. Patent litigation in particular is subject to significant postural shifts over short time frames, making the Company’s ability to assess probable liability particularly speculative in any given fiscal quarter even though the matter may be resolved in the next fiscal quarter. If an unfavorable resolution were to occur, there exists the possibility of a material adverse impact on the Company's consolidated financial condition, results of operations or cash flows for the period in which the resolution occurs or on future periods.
	For fiscal 2014 and 2013, the Company accrued loss contingencies for certain legal matters totaling $0.3 million and $14.0 million, respectively. For fiscal 2012, accrued loss contingencies were not material to the Company's Consolidated Financial Statements.
	In addition, these actions or other third-party claims against the Company may cause the Company to incur costly litigation and/or substantial settlement charges. Furthermore, the outcome of any patent related litigation may require the Company to make ongoing royalty payments, which could adversely affect gross margins in future periods. If any of those events were to occur, the Company's business, financial condition, results of operations, and cash flows could be adversely affected in any particular period by an unfavorable resolution of one or more of these contingencies.
	Lease Obligations
	The Company leases office spaces under non-cancelable operating leases with various expiration dates through June 2018. The terms of certain operating leases provide for rental payments on a graduated scale. The Company recognizes rent expense on a straight-line basis over the respective lease periods and has accrued for rent expense incurred but not paid. Rent expense for fiscal 2014, 2013, and 2012 was $8.5 million, $7.2 million and $5.6 million, respectively.
	At July 31, 2014, future minimum lease payments under non-cancelable operating leases are as follows:
		Operating Leases
		(in thousands)
	Years ending July 31,
	2015	$	8,096
	2016	8,313
	2017	3,189
	2018	1,381
	Total future minimum payments	$	20,979
	Employee Agreements
	The Company has signed various employment agreements with certain executives pursuant to which if their employment is terminated without cause, the executives are entitled to receive certain benefits, including, but not limited to, accelerated stock option vesting.
	Non-cancelable Purchase Commitments
	The Company outsources the production of its hardware to third-party contract manufacturers, and enters into various inventory-related purchase commitments with these contract manufacturers and other suppliers. In addition, from time to time, the Company also enters into significant information technology and marketing agreements with its vendors, which are non-cancelable. The Company had $45.4 million and $40.0 million in non-cancelable purchase commitments as of July 31, 2014 and 2013, respectively. The Company expects to sell all products that it has committed to purchase from its third-party contract manufacturers and other suppliers.
	Warranties
	The Company provides for future warranty costs upon product delivery. The specific terms and conditions of those warranties vary depending upon the product sold and country in which the Company does business. In the case of hardware, the warranties are generally for one year and for certain products a lifetime warranty from the date of purchase.
	The Company warrants that any media on which its software products are recorded will be free from defects in materials and workmanship under normal use for a period of 90 days from the date the products are delivered to the end customer. In addition, the Company warrants that its hardware products will substantially conform to the Company’s published specifications. Historically, the Company has not experienced material warranty costs. Factors that affect the Company’s warranty liability include the number of installed units, historical experience and management’s judgment regarding anticipated rates of warranty claims and cost per claim. The Company assesses the adequacy of its recorded warranty liabilities every period and makes adjustments to the liability as necessary.
	The warranty liability is included as a component of accrued liabilities on the Consolidated Balance Sheets. Changes in the warranty liability are as follows:
		Product Warranty
		(in thousands)
	As of July 31, 2011	$	404
	Changes to the provision	956
	Obligations fulfilled during period	(542		)
	As of July 31, 2012	818
	Changes to the provision	479
	Obligations fulfilled during period	(520		)
	As of July 31, 2013	777
	Changes to the provision	601
	Obligations fulfilled during period	(435		)
	As of July 31, 2014	$	943
	Indemnification
	In its sales agreements, the Company may agree to indemnify its indirect sales channels and end user customers for certain expenses or liabilities resulting from claimed infringements of patents, trademarks or copyrights of third parties. The terms of these indemnification provisions are generally perpetual any time after execution of the agreement. The agreements generally limit the scope of the available remedies in a variety of industry-standard methods, including, but not limited to, product usage and geography-based limitations, a right to control the defense or settlement of any claim, and a right to replace or modify the infringing products to make them non-infringing. In certain circumstances, the Company may be subject to uncapped indemnity obligations. To date the Company has not paid any amounts to settle claims or defend lawsuits pursuant to such indemnification provisions. The Company believes the likelihood of such claims is remote and is unable to reasonably estimate the maximum amount that could be payable under these provisions because these obligations are not capped but are conditional to the unique facts and circumstances involved. Accordingly, the Company has no liabilities recorded for these agreements as of July 31, 2014 and July 31, 2013. In addition, the Company indemnifies its officers, directors, and certain key employees while they are serving in good faith in their company capacities.

Quarterly_Financial_Informatio

Quarterly Financial Information (unaudited)	12 Months Ended
	Jul. 31, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Financial Information (unaudited)	'
	Quarterly Financial Information (unaudited)
	The following table presents unaudited quarterly financial information for each of our most recent eight fiscal quarters:
		Fiscal Quarters Ended
		July 31,			April 30,			January 31,			October 31,			July 31,			April 30,			January 31,		October 31,
		2014			2014			2014			2013			2013			2013			2013		2012
		(in thousands, except per share amounts)
	Revenue	$	202,862		$	188,788		$	176,356		$	160,927		$	153,064		$	147,136		$	155,362	$	144,482
	Gross profit	139,879			128,894			123,003			112,376			107,331			103,164			110,706		102,364
	Operating income (loss)	8,463			519			(3,619		)	(5,628		)	(20,345		)	(2,423		)	6,221		4,531
	Net income (loss)	(4,086		)	(6,351		)	(10,702		)	(7,827		)	(15,581		)	(20,191		)	4,990		(826		)
	Net income (loss) per common share, basic	$	(0.04	)	$	(0.06	)	$	(0.10	)	$	(0.07	)	$	(0.14	)	$	(0.18	)	$	0.04	$	(0.01	)
	Net income (loss) per common share, diluted	$	(0.04	)	$	(0.06	)	$	(0.10	)	$	(0.07	)	$	(0.14	)	$	(0.18	)	$	0.04	$	(0.01	)

Subsequent_Events

Subsequent Events	12 Months Ended
	Jul. 31, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	On August 22, 2014, the Company's Board of Directors approved a restructuring plan to optimize the administrative costs of the Company’s operations by realigning its workforce to better reflect the Company’s business operations. The Company expects this cost optimization plan will reduce its current workforce by approximately 3.7%, or 66 positions, as well as relocate approximately 4.2% of its current workforce, or 75 positions, to the Company’s facilities in Portland, Oregon, Bangalore, India, and Cork, Ireland. The Company estimates that it will incur pre-tax restructuring charges of between approximately $6.0 million to $8.0 million, substantially all of which would result in cash expenditures for employee termination benefits and related costs, as well as between $2.3 million and $4.3 million in other pre-tax costs related to these restructuring charges, including temporary, redundant personnel and facility costs, recruiting costs and other travel and personnel-related costs associated with employee transitions to lower cost operating locations. The Company expects that these pre-tax charges will be expensed over the first three quarters of fiscal 2015, with the majority of the charges expected to be expensed in the first half of fiscal 2015.

Schedule_II_Valuation_and_Qual

Schedule II Valuation and Qualifying Accounts	12 Months Ended
	Jul. 31, 2014
Valuation and Qualifying Accounts [Abstract]	'
Schedule II Valuation and Qualifying Accounts	'
	Financial Schedules: Schedule II Valuation and Qualifying Accounts appears below and should be read in conjunction with the Consolidated Financial Statements included in this report.
		Balance at		Net Additions			Deductions			Balance at
		Beginning								End of
		of Year								Year
		(in thousands)
	Fiscal 2012
	Allowance for doubtful accounts	$	306	$	125		$	(155	)	$	276
	Sales returns	$	286	$	1,051		$	(690	)	$	647
	Valuation allowance on deferred tax assets	$	235	$	—		$	(148	)	$	87
	Fiscal 2013
	Allowance for doubtful accounts	$	276	$	737		$	(208	)	$	805
	Sales returns	$	647	$	994		$	(328	)	$	1,313
	Valuation allowance on deferred tax assets	$	87	$	4,727		$	(87	)	$	4,727
	Fiscal 2014
	Allowance for doubtful accounts	$	805	$	(101	)	$	(371	)	$	333
	Sales returns	$	1,313	$	1,680		$	(1,893	)	$	1,100
	Valuation allowance on deferred tax assets	$	4,727	$	2,101		$	—		$	6,828

The_Company_and_its_Significan1

The Company and its Significant Accounting Policies (Policies)	12 Months Ended
	Jul. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Principles of Consolidation	'
	Principles of Consolidation
	The accompanying Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated.
Use of Estimates	'
	Use of Estimates
	The preparation of these financial statements in conformity with generally accepted accounting principles in the United States of America requires that the Company make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses as presented in the Consolidated Financial Statements and accompanying notes. The Company’s critical accounting policies are those that affect the Company’s financial statements materially and involve subjective or complex judgments by management. Significant Company estimates include, among others, revenue recognition, stock-based compensation, inventory valuation, allowances for doubtful accounts, fair value measurements, impairment of goodwill and intangible assets, accounting for income taxes, and loss contingencies. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Although these estimates are based on management’s best knowledge of current events and actions that may impact the Company in the future, actual results may differ from the estimates made by management with respect to these and other items.
Reclassifications	'
	Reclassifications
	The ratable product and related support and professional services revenue and the related cost of revenue in fiscal 2012 have been reclassified to support and professional services revenue and related cost of revenue in the accompanying Consolidated Statements of Operations. The Company believes the ratable product and related support and professional services revenue and related cost of revenue are not material to total revenue and cost of revenue, and the nature of these amounts are consistent with support and professional services revenue and related cost of revenue. The amounts for fiscal 2012 have been reclassified to conform with the current presentation.
Foreign Currency Transactions	'
	Foreign Currency Transactions
	The functional currency of the Company's foreign subsidiaries is the U.S. dollar. Accordingly, the Company's monetary assets and liabilities of the foreign subsidiaries are re-measured into U.S. dollars at the exchange rates in effect at the reporting date, non-monetary assets and liabilities are translated at historical rates, and revenue and expenses are translated at average exchange rates in effect during each reporting period. The transaction gains and losses are included as a component of other income, net in the accompanying Consolidated Statements of Operations.
	Previously, the Company's Irish subsidiary used the Euro as its functional currency. Consequently, all assets and liabilities were translated to U.S. dollars using exchange rates in effect at the balance sheet dates. Translation adjustments were included in stockholders' equity in the accompanying Consolidated Balance Sheets as a component of accumulated other comprehensive loss. As of May 1, 2012, the Company changed its operational strategy and determined that the Irish subsidiary will buy and sell in U.S. dollars. Consequently, the Company changed its functional currency designation for the subsidiary from the Euro to U.S. dollars as of May 1, 2012.
Risks and Uncertainties	'
	Risks and Uncertainties
	The Company is subject to all of the risks inherent in operating in the networking and communications industry. These risks include, but are not limited to, new and rapidly evolving markets, a lengthy sales cycle, dependence on the development of new products and services, unfavorable economic and market conditions, customer acceptance of new products, competition from larger and more established companies, limited management resources, dependence on a limited number of contract manufacturers and suppliers, and the changing nature of the networking and communications industry. Failure by the Company to anticipate or to respond adequately to technological developments in its industry, changes in customer or supplier requirements, changes in regulatory requirements or industry standards, or any significant delays in the development or introduction of products and services, would have a material adverse effect on the Company's business, operating results and financial position.
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	The Company measures its financial instruments at fair value or amounts that approximate fair value. The Company maximizes the use of observable inputs and minimizes the use of unobservable inputs when developing fair value measurements. When available, the Company uses quoted market prices to measure fair value. If market prices are not available, fair value measurement is based upon models that use primarily market-based or independently-sourced market parameters. If market observable inputs for model-based valuation techniques are not available, the Company makes judgments about assumptions market participants would use in estimating the fair value of the financial instrument. Carrying values of cash equivalents, short-term investments, accounts receivable, accounts payable, and accrued liabilities approximate their fair values due to the short-term nature and liquidity of these financial instruments.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	The Company considers all highly liquid marketable securities purchased with an original maturity of 90 days or less at the time of purchase to be cash equivalents. Cash and cash equivalents are comprised of cash, sweep funds and money market funds. Due to the short-term nature and liquidity of these financial instruments, the carrying value of these assets approximates fair value.
Short-Term Investments	'
	Short-Term Investments
	Short-term investments comprise marketable securities that consist primarily of corporate bonds, U.S. government agency securities, U.S. treasury bills, commercial paper, certificates of deposit, municipal notes, and bonds with original maturities beyond 90 days at the time of purchase. As the Company views all of its marketable securities as representing the investment of funds available for current operations, and management has the ability and intent, if necessary, to liquidate any of these investments in order to meet the Company’s liquidity needs within the next 12 months, the short-term investments are classified as available-for-sale. The Company’s policy is to protect the value of its investment portfolio and minimize principal risk by earning returns based on current interest rates. The Company's marketable securities are carried at fair value, with the unrealized gains and losses, net of tax, reported as a component of stockholders' equity.
	The Company reviews the individual securities in its portfolio to determine whether a decline in a security’s fair value below the amortized cost basis is other-than-temporary. If other-than-temporary impairment (“OTTI”) has been incurred, and it is more likely than not that the Company will not sell the investment security before the recovery of its amortized cost basis, then the OTTI is separated into (a) the amount representing the credit loss and (b) the amount related to all other factors. The amount of the total OTTI related to the credit loss is recognized in earnings. The amount of the total OTTI related to other factors is recognized in accumulated other comprehensive loss.
Concentrations of Credit Risk	'
	Concentrations of Credit Risk
	Financial instruments that potentially subject the Company to a concentration of credit risk include cash, cash equivalents, short-term investments and accounts receivable. The Company maintains its cash, cash equivalents and short-term investments with high credit quality financial institutions and has not experienced any losses on its deposits of its cash and cash equivalents and its short-term investments due to concentration of credit risk. The Company’s accounts receivable are derived from revenue earned from customers located in the Americas, Europe, the Middle East and Africa, and Asia Pacific. The Company performs ongoing credit evaluations of its customers’ financial conditions and generally requires no collateral from its customers. The Company maintains an allowance for doubtful accounts based upon the expected collectability of accounts receivable, and to date such losses have been within management’s expectations.
Allowance for Doubtful Accounts	'
	Allowance for Doubtful Accounts
	The Company records an allowance for doubtful accounts based on historical experience and a detailed assessment of the collectability of its accounts receivable. In estimating the allowance for doubtful accounts, management considers, among other factors, (i) the aging of the accounts receivable, including trends within and ratios involving the age of the accounts receivable, (ii) the Company’s historical write-offs, (iii) the credit-worthiness of each customer, (iv) the economic conditions of the customer’s industry, and (v) general economic conditions. In cases where the Company is aware of circumstances that may impair a specific customer’s ability to meet its financial obligations, the Company records a specific allowance against amounts due from the customer, and thereby reduces the net recognized receivable to the amount it reasonably believes will be collected.
Inventory	'
	Inventory
	Inventory consists of hardware and related component parts and is stated at the lower of cost or market. Cost is computed using the standard cost, which approximates actual cost, on a first-in, first-out basis. The Company records inventory write-downs for potentially excess inventory based on forecasted demand, economic trends, and technological obsolescence of its products and transition of inventory related to new product releases. At the point of loss recognition, a new, lower-cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in the restoration or increase in that newly established cost basis.
Deferred Costs of Revenue	'
	Deferred Costs of Revenue
	When the Company’s products have been delivered, but the product revenue associated with the arrangement has been deferred as a result of not meeting the revenue recognition criteria, the Company also defers the related inventory costs for the delivered items.
Property and Equipment, net	'
	Property and Equipment, net
	Property and equipment, net are stated at historical cost net of accumulated depreciation. Property and equipment, excluding leasehold improvements, are depreciated using the straight-line method over the estimated useful lives of the respective assets, generally ranging from two to six years. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful lives of the respective assets, or the lease term. Leasehold improvements are recorded at cost with any reimbursements from the landlord being accounted for as a reduction of rent expense using the straight-line method over the lease term. Expenditures for maintenance and repairs are expensed as incurred and significant improvements and betterments that substantially enhance the life of an asset are capitalized.
	Upon retirement or sale, the cost of assets disposed of and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is credited or charged to the statement of operations, under other income, net.
Software Development Costs	'
	Software Development Costs
	The Company capitalizes certain costs incurred to develop software for internal use and amortizes the capitalized costs on a straight-line basis over the estimated useful life, generally three years. Such capitalized costs include external direct costs utilized in developing or obtaining the applications and payroll and payroll-related expenses for employees who are directly associated with developing the applications. Capitalization of such costs begins when the internal-use software system has reached the application development stage and ceases when the project is substantially complete and ready for its intended purpose. Capitalized internal-use software is included in the computer software category within property and equipment, net, in the Company's Consolidated Balance Sheets. For fiscal 2014 and 2013, the Company capitalized costs associated with internal-use software totaling $1.2 million and $3.5 million, respectively. The unamortized balance of capitalized internal-use software at July 31, 2014 and July 31, 2013 was $3.3 million and related amortization expense for fiscal 2014 and 2013 was $1.2 million and $0.2 million, respectively. There were no capitalized costs for internal-use software in fiscal 2012.
	The Company expenses costs to develop software products or the software component of products to be marketed to external users, before technological feasibility of such products is reached. After technological feasibility is established, material software development costs are capitalized. To date, the period between achieving technological feasibility, which the Company has defined as the establishment of a working model, which typically occurs when beta testing commences, and the general availability of such software has been short and software development costs qualifying for capitalization have been insignificant.
Intangible Assets, net	'
	Intangible Assets, net
	Intangible assets with finite lives are carried at cost, less accumulated amortization. Amortization is computed using the straight-line method over the estimated economic lives of the assets, which range from one to thirteen years.
Impairment of Long-lived Assets and Indefinite-lived Intangibles	'
	Impairment of Long-lived Assets and Indefinite-lived Intangibles
	Long-lived assets, including intangible assets with finite lives, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Determination of recoverability is based on an estimate of undiscounted future cash flows resulting from the use of the asset and its eventual disposition. Measurement of an impairment loss for long-lived assets that management expects to hold and use is based on the fair value of the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds their fair value, which is typically calculated using discounted expected future cash flows. The Company did not recognize any significant impairment charges during fiscal 2014, 2013, and 2012.
	Indefinite-lived intangible assets, such as in-process research and development intangibles, are intangible assets that are not subject to amortization and are tested for impairment annually, during the Company's fourth fiscal quarter, or sooner if events or changes in circumstances indicate that the asset might be impaired. The impairment test consists of a comparison of the fair value of an indefinite-lived intangible asset with its carrying amount. If the carrying amount of an indefinite-lived intangible asset exceeds its fair value, an impairment loss shall be recognized in an amount equal to that excess. Once the research and development efforts are completed or abandoned, the Company shall determine the useful life of the assets and is required to perform an impairment test of the asset.
Goodwill	'
	Goodwill
	Goodwill represents the excess cost of a business acquisition over the fair value of the net assets acquired. The Company performs impairment testing on its goodwill at least annually, during its fourth fiscal quarter, and sooner if indicators of impairment exist at the reporting unit level. The Company performs its impairment testing by first assessing qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of its reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of its reporting unit is less than its carrying amount, the Company performs a two-step impairment test. The first step requires the identification of the reporting units and comparison of the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of the reporting unit is less than its carrying value, an indication of goodwill impairment exists for the reporting unit and the second step of the impairment test is performed to compute the amount of the impairment. Under the second step, an impairment loss is recognized for any excess of the carrying amount of the reporting unit’s goodwill over the implied fair value of that goodwill. The Company has determined that it has only one reporting unit.
Revenue Recognition	'
	Revenue Recognition
	Total revenue is derived primarily from the sale of products and services, including support and professional services. The following revenue recognition policies define the manner in which the Company accounts for its sales transactions.
	The Company recognizes revenue when all of the following criteria have occurred: (1) the Company has entered into a legally binding arrangement with a customer; (2) delivery has occurred or the title and risk of loss has passed; (3) customer payment is deemed fixed or determinable and free of contingencies and significant uncertainties; and (4) collection is reasonably assured.
	The Company’s fees are typically considered to be fixed or determinable at the inception of an arrangement, generally based on specific products and quantities to be delivered. Substantially all of the Company’s contracts do not include rights of return or acceptance provisions. To the extent that the Company’s agreements contain such terms, the Company recognizes revenue once the customer has accepted, or once the acceptance provisions or right of return lapses. Payment terms to customers generally range from net 30 to 90 days. In the event payment terms are provided that differ from the Company’s standard business practices, the fees are deemed to not be fixed or determinable and revenue is recognized when the payments are received, provided the remaining criteria for revenue recognition have been met.
	The Company assesses the ability to collect from its customers based on a number of factors, including credit worthiness of the customer and past transaction history of the customer. If the customer is not deemed credit worthy, the Company defers revenue from the arrangement until payment is received and all other revenue recognition criteria have been met. The Company records estimated sales returns as a reduction to revenue upon shipment based on its contractual obligations and historical returns experience. In cases where the Company is aware of circumstances that will likely result in a specific customer’s request to return purchased equipment, the Company records a specific sales returns reserve.
	The Company’s revenue recognition policies provide that, when a sales arrangement contains multiple elements, such as hardware and software licenses and/or services, the Company allocates revenue to each element based on a selling price hierarchy. The selling price for a deliverable is based on its vendor specific objective evidence (“VSOE”) of selling price if available, third party evidence (“TPE”) of selling price, if VSOE is not available, or best estimated selling price (“BESP”) if neither VSOE nor TPE is available. In multiple element arrangements where non-essential software deliverables are included, revenue for these multiple-element arrangements is allocated to the software deliverable and the non-software deliverables based on the relative selling prices of all of the deliverables in the arrangement using the hierarchy in the applicable accounting guidance. The Company limits the amount of revenue recognition for delivered elements to the amount that is not contingent on the future delivery of products or services, future performance obligations or subject to customer-specified return or refund privileges.
	The Company establishes VSOE of selling price using the price charged for a deliverable based upon the normal pricing and discounting practices when sold separately. VSOE for support services, professional services, and training is measured by the stand-alone renewal rate offered to the customer. In determining VSOE, the Company requires that a substantial majority of the selling prices for an element falls within a reasonably narrow pricing range, generally evidenced by a substantial majority of such historical stand-alone transactions falling within a reasonably narrow range of the median rates. In addition, the Company considers major service groups, geographies, customer classifications, and other variables in determining VSOE.
	TPE of selling price is established by evaluating largely similar and interchangeable competitor products or services in standalone sales to similarly situated customers. The Company is typically not able to determine TPE for the Company’s products or services. Generally, the Company’s go-to-market strategy differs from that of the Company’s peers and the Company’s offerings contain a significant level of differentiation such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, the Company is unable to reliably determine selling prices of competitor products and services on a stand-alone basis.
	When the Company is unable to establish the selling price of its non-software elements using VSOE or TPE, the Company uses BESP in its allocation of the arrangement consideration. The objective of BESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. The Company determines BESP for a product or service by considering multiple factors including, but not limited to, cost of products, gross margin objectives, pricing practices, geographies, customer classes and distribution channels.
	The Company regularly reviews estimated selling price of the product offerings and maintains internal controls over the establishment and updates of these estimates. The Company currently does not expect a material impact in the near term from changes in estimated selling prices, including VSOE of selling price.
Products	'
	Products
	Product revenue consists of revenue from sales of the Company’s hardware appliances, perpetual software licenses, and software as a service. The majority of the Company’s products are hardware appliances containing software components that function together to provide the essential functionality of the product. Therefore, the Company’s hardware appliances are considered non-software elements and are not subject to the industry-specific software revenue recognition guidance. For these appliances, delivery occurs upon transfer of title and risk of loss, which is generally upon shipment. It is the Company’s practice to ensure an end-user has been identified by the channel partner prior to shipment to a channel partner. For end-users and channel partners, the Company generally has no significant obligations for future performance such as rights of return or pricing credits.
	For sales to direct end-users and certain channel partners, including value-added resellers (“VARs”), the Company recognizes product revenue upon delivery, assuming all other revenue recognition criteria are met. The Company also sells through value-added distributors (“VADs”). A significant portion of the Company’s sales are made through VADs under agreements allowing for stocking of the Company’s products in their inventory, pricing credits and limited rights of return for stock rotation. Product revenue on sales made through these VADs is initially deferred and revenue is recognized upon sell-through as reported by the VADs to the Company.
	The Company’s product revenue also includes revenue from the sale of stand-alone software products. Stand-alone software products may operate on the Company’s hardware appliance but are not considered essential to the functionality of the hardware. Sales of stand-alone software generally include a perpetual license to the Company’s software. For sales of stand-alone software, the Company recognizes revenue based on software revenue recognition guidance. Under the software revenue recognition guidance, the Company uses the residual method to recognize revenue when a product agreement includes one or more elements to be delivered at a future date and VSOE of the fair value of all undelivered elements exists. In the majority of the Company’s contracts, the only element that remains undelivered at the time of delivery of the product is support services. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the contract fee is recognized as product revenue. If evidence of the fair value of one or more undelivered elements does not exist, all revenue is generally deferred and recognized when delivery of those elements occurs or when fair value can be established. When the only undelivered element for which the Company does not have VSOE of selling price is support, revenue for the entire arrangement is bundled and recognized ratably over the support period. Product revenue for the Company's software as a service is recognized ratably over the contractually committed service delivery period.
Services	'
	Services
	Service revenue consists of revenue from support agreements, professional services, and training. Support services include repair and replacement of defective hardware appliances, software updates and access to technical support personnel. Software updates provide customers with rights to unspecified software product upgrades and to maintenance releases and patches released during the term of the support period. Revenue for support services is recognized on a straight-line basis over the service contract term, which is typically one to five years. Revenue for professional services is recognized upon delivery or completion of performance. Professional service arrangements are typically short-term in nature and are largely completed within 90 days from the start of service. Revenue for training services is recognized upon delivery of the training. Costs associated with these service offerings are expensed as incurred.
	Post-contractual services (“PCS”) that the Company provides to its channel partners differ from PCS that it provides to its end customers in that the Company is only obligated to provide support services to the channel partner directly, while the channel partner is obligated to provide support services directly to the end customer. The channel partner is obligated to provide to the end customer first level troubleshooting assistance as well as second level support for high-level technical and product diagnosis which might include returned merchandise fulfillment. The Company’s obligations are only to provide software upgrades and, in the unusual scenario in which the channel partner is unable to provide the technical support that the end customer requires, a third level technical diagnosis and support.
Shipping and Handling	'
	Shipping and Handling
	Shipping charges billed to customers are included in product revenue and the related shipping costs are included in cost of product revenue.
Research and Development Expenses	'
	Research and Development Expenses
	Research and development costs, primarily consisting of salaries and employee benefits, including stock-based compensation costs, as well as, administrative costs, other than capitalized software development costs, are charged to operations as incurred.
Stock-Based Compensation	'
	Stock-Based Compensation
	The Company measures and recognizes compensation expense for all stock-based awards made to employees and non-employees under the fair value method. The Company’s stock-based awards include stock options, restricted stock units and awards, employee stock purchase plan, and performance-based awards. The Company calculates the fair value of restricted stock and performance-based awards, which are paid in restricted stock, based on the fair market value of its common stock on the date of grant. The Company calculates the fair value of stock options and employee stock purchase plan shares on the date of grant using the Black-Scholes option-pricing model. This methodology requires the use of subjective assumptions such as expected stock price volatility over the term of the awards, actual and projected employee stock option exercise behaviors, risk-free interest rates and expected dividends. This fair value is then amortized on a straight-line basis over the requisite service period of the awards, which is generally the vesting period. The Company determines the amount of stock-based compensation expense based on awards that it ultimately expects to vest, reduced for estimated forfeitures. In addition, stock-based compensation expense includes the effects of awards modified, repurchased or cancelled.
Income Taxes	'
	Income Taxes
	The Company estimates its income taxes based on the various jurisdictions where it conducts business. Significant judgment is required in determining its worldwide income tax provision. Deferred income taxes are recorded for the expected tax consequences of temporary differences between the tax bases of assets and liabilities for financial reporting purposes and amounts recognized for income tax purposes. The Company records a valuation allowance to reduce its deferred tax assets to the amount of future tax benefit that is more likely than not to be realized.
	Foreign earnings that are considered to be permanently reinvested outside of the United States are excluded from U.S. tax provision.
	A two-step approach is applied for the recognition and measurement of uncertain tax positions taken or expected to be taken in a tax return. The first step is to determine if the weight of available evidence indicates that it is more likely than not that the tax position will be sustained in an audit, including resolution of any related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. The Company recognizes interest and penalties related to uncertain tax positions in its provision for income taxes line in the accompanying Consolidated Statements of Operations.
	In computing the tax benefit of stock-based compensation, the Company uses the direct method and the "with and without" method for utilization of tax attributes.
Comprehensive Income (Loss)	'
	Comprehensive Income (Loss)
	Comprehensive income (loss) consists of other comprehensive income (loss) and net loss. Other comprehensive income (loss) refers to revenue, expenses, gains and losses that under generally accepted accounting principles are recorded as an element of stockholders’ equity but are excluded from net loss. Other comprehensive income (loss) consists of foreign currency translation adjustments and unrealized gains and losses from short-term investments, net of tax.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In March 2013, the Financial Accounting Standards Board ("FASB") issued an accounting standard update requiring an entity to release into net income (loss) the entire amount of a cumulative translation adjustment related to its investment in a foreign entity when as a parent it either sells a part or all of its investment in the foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets within the foreign entity. This accounting standard update will be effective for the Company beginning in its first quarter of fiscal 2015. The Company is currently evaluating the impact of this accounting standard update on its Consolidated Financial Statements.
	In July 2013, the FASB issued an accounting standard update that provides explicit guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists, with the purpose of reducing diversity in practice. This standard update requires the netting of unrecognized tax benefits against a deferred tax asset for a loss or other carryforward that would apply in settlement of the uncertain tax positions. This accounting standard update will be effective for the Company's fiscal 2015 and applied prospectively, with early adoption permitted. The Company is currently evaluating the impact of this accounting standard update on its Consolidated Financial Statements.
	In April 2014, the FASB issued an accounting standard update that changes the criteria for reporting discontinued operations. This accounting standard raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of discontinued operation. Under the revised standard, a disposal of a component of an entity or a group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has, or will have, a major effect on an entity's operations and financial results when either it qualifies as held for sale, disposed of by sale, or disposed of other than by sale. This accounting standard will be effective for the Company beginning in its first quarter of fiscal 2016. The Company is currently evaluating the impact of this accounting standard update on its Consolidated Financial Statements.
	In May 2014, the FASB issued an accounting standard update which provides for new revenue recognition guidance. The new standard supersedes nearly all existing revenue recognition guidance. The core principle of the new guidance is to recognize revenue when promised goods or services are transferred to customers, in an amount that reflects the consideration to which the vendor expects to receive for those goods or services. The new standard is expected to require more judgment and estimates within the revenue recognition process than required under existing U.S. GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to separate performance obligations. This accounting standard will be effective for the Company beginning in its first quarter of fiscal 2018, with no early adoption permitted, using one of two methods of adoption: (i) retrospective to each prior reporting period presented, with the option to elect certain practical expedients as defined within the standard; or (ii) retrospective with the cumulative effect of initially applying the standard recognized at the date of initial application inclusive of certain additional disclosures. The Company is currently evaluating the impact of this accounting standard update on its Consolidated Financial Statements.

Business_Combinations_Tables

Business Combinations (Tables)	12 Months Ended
	Jul. 31, 2014
Meridian Apps, Inc. [Member]	'
Business Acquisition [Line Items]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The following table summarizes the allocation of the purchase price consideration:
			Amount			Estimated
						Useful Lives
			(in thousands)
	Tangible assets acquired and liabilities assumed		$	(1,218	)
	Amortizable intangible assets:
	Existing technology		5,000			3 years
	Patent		2,000			11 years
	Customer contracts and related relationships		300			4 years
	Trade name and trademarks		400			4 years
	Total net assets acquired		6,482
	Goodwill		10,295
	Purchase price consideration (cash)		$	16,777
Avenda Systems [Member]	'
Business Acquisition [Line Items]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The purchase price consideration in the transaction was allocated as follows (in thousands):
	Cash and cash equivalents		$	2,389
	Other assets		275
	Total tangible assets acquired		$	2,664
						Estimated
						Useful Lives
	Amortizable intangible assets:
	Existing technology		$	12,800		4 to 7 years
	Customer contracts		300			5 years
	Goodwill		23,604
	Total assets acquired		39,368
	Liabilities assumed		(1,784		)
	Deferred tax liability		(2,109		)
	Total purchase price consideration		$	35,475
Summary of Purchase Price	'
	The purchase price consideration in the transaction consisted of cash and stock as follows (in thousands, except share and per share data):
	Cash	$	23,475
	Stock (526,996 shares at $22.77 per share)	12,000
	Total purchase price consideration	$	35,475
Other Acquisition [Member]	'
Business Acquisition [Line Items]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The purchase price consideration in the transaction was allocated as follows (in thousands):
						Estimated
						Useful Lives
	Amortizable intangible assets:
	Non-compete agreement		$	100		4 years
	In-process research and development		1,200
	Goodwill		200
	Total assets acquired		1,500
	Liabilities assumed		(81		)
	Total purchase price consideration		$	1,419

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Jul. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Company's Goodwill	'
	The following table presents details of the Company’s goodwill:
		Amount
		(in thousands)
	As of July 31, 2012	$	56,947
	Goodwill acquired in acquisition of Meridian	10,295
	As of July 31, 2013	$	67,242
	Changes in goodwill	—
	As of July 31, 2014	$	67,242
Schedule of Intangible Assets	'
	The following table presents details of the Company’s intangible assets:
		Estimated		Gross				Accumulated				Net
		Useful Lives		Value				Amortization				Value
		(in thousands, except estimated useful lives)
	As of July 31, 2014
	Existing technology	3 to 7 years		$	41,383			$	(29,196	)		$	12,187
	Patents/core technology	2 to 13 years		11,796				(5,881		)		5,915
	Customer contracts	4 to 7 years		7,533				(6,536		)		997
	Support agreements	5 to 6 years		2,917				(2,839		)		78
	Trade names/trademarks	1 to 5 years		1,150				(867		)		283
	Non-compete agreements	2 to 4 years		912				(867		)		45
	Total			$	65,691			$	(46,186	)		$	19,505
	In fiscal 2014, the Company purchased certain patents and entered into a perpetual patent license agreement, totaling $2.8 million, to support its product development strategy and research and development efforts.
		Estimated		Gross				Accumulated				Net
		Useful Lives		Value				Amortization				Value
		(in thousands, except estimated useful lives)
	As of July 31, 2013
	Existing technology	3 to 7 years		$	41,383			$	(21,269	)		$	20,114
	Patents/core technology	2 to 11 years		9,046				(4,784		)		4,262
	Customer contracts	4 to 7 years		7,533				(5,537		)		1,996
	Support agreements	5 to 6 years		2,917				(2,805		)		112
	Trade names/trademarks	1 to 5 years		1,150				(767		)		383
	Non-compete agreements	2 to 4 years		912				(842		)		70
	Total			$	62,941			$	(36,004	)		$	26,937
Summary of Amortization Expense of Intangible Assets	'
	Intangible assets amortization expense is recorded in the Consolidated Statements of Operations as follows:
		Years ended July 31,
		2014				2013				2012
		(in thousands)
	Cost of product revenues	$	9,021			$	6,080			$	5,875
	Cost of support and professional services revenues	—				284				540
	Sales and marketing	1,132				1,410				1,812
	Research and development	24				25				—
	General and administrative	5				—				—
	Total amortization expense	$	10,182			$	7,799			$	8,227
Estimated Future Amortization Expense of Purchased Intangible Assets	'
	The following table presents the estimated future amortization expense of intangible assets as of July 31, 2014:
		Amount
		(in thousands)
	Years ending July 31,
	2015	$	8,423
	2016	4,585
	2017	1,774
	2018	1,521
	2019	787
	Thereafter	2,415
	Total	$	19,505

Net_Loss_Per_Common_Share_Tabl

Net Loss Per Common Share (Tables)	12 Months Ended
	Jul. 31, 2014
Earnings Per Share [Abstract]	'
Computation of Net Loss Per Share	'
	The following tables set forth the computation of basic and diluted net loss per share:
		Years ended July 31,
		2014				2013			2012
		(in thousands, except per share data)
	Net loss	$	(28,965	)		$	(31,608	)	$	(8,851	)
	Weighted-average common shares outstanding, basic	108,443				113,284			108,774
	Dilutive effect of potential common shares	—				—			—
	Weighted-average common shares outstanding, diluted	108,443				113,284			108,774
	Net loss per share, basic	$	(0.27	)		$	(0.28	)	$	(0.08	)
	Net loss per share, diluted	$	(0.27	)		$	(0.28	)	$	(0.08	)
Summary of Outstanding Stock Options and Awards	'
	The following table presents the potential common shares outstanding that were excluded from the computation of basic and diluted net loss per share for the periods presented, because including them would have had an anti-dilutive effect:
		As of July 31, 2014
		2014			2013			2012
		(in thousands)
	Options to purchase common stock	7,138			10,048			13,264
	Restricted stock awards	8,890			10,788			8,423
	Contingently issuable shares	629			680			591
	Employee stock purchase plan	111			180			—

ShortTerm_Investments_Tables

Short-Term Investments (Tables)	12 Months Ended
	Jul. 31, 2014
Short-term Investments [Abstract]	'
Summary of Short-Term Investments	'
	Short-term investments consist of the following:
		Cost Basis		Gross			Gross			Fair Value
				Unrealized			Unrealized
				Gains			Losses
		(in thousands)
	As of July 31, 2014
	Corporate bonds	$	54,969	$	79		$	(15	)	$	55,033
	U.S. government agency securities	90,681		17			(58		)	90,640
	U.S. treasury bills	14,560		17			—			14,577
	Commercial paper	4,587		4			—			4,591
	Municipal notes and bonds	1,518		—			—			1,518
	Total short-term investments	$	166,315	$	117		$	(73	)	$	166,359
		Cost Basis		Gross			Gross			Fair Value
				Unrealized			Unrealized
				Gains			Losses
		(in thousands)
	As of July 31, 2013
	Corporate bonds	$	79,493	$	29		$	(97	)	$	79,425
	U.S. government agency securities	133,794		43			(11		)	133,826
	U.S. treasury bills	36,317		39			—			36,356
	Commercial paper	13,672		3			—			13,675
	Certificates of deposit	5,000		10			—			5,010
	Municipal notes and bonds	1,590		—			—			1,590
	Total short-term investments	$	269,866	$	124		$	(108	)	$	269,882
Cost Basis and Fair Value of Debt Securities by Contractual Maturity	'
	The cost basis and fair value of the short-term investments by contractual maturity consist of the following:
		Cost		Fair
		Basis		Value
		(in thousands)
	As of July 31, 2014
	One year or less	$	110,184	$	110,280
	Over one year and less than two years	56,131		56,079
	Total short-term investments	$	166,315	$	166,359
		Cost		Fair
		Basis		Value
		(in thousands)
	As of July 31, 2013
	One year or less	$	165,614	$	165,682
	Over one year and less than two years	104,252		104,200
	Total short-term investments	$	269,866	$	269,882
Fair Value and Gross Unrealized Losses of Company's Investments	'
	The following table summarizes the fair value and gross unrealized losses of the Company’s investments with unrealized losses aggregated by type of investment instrument and the length of time that individual securities have been in a continuous unrealized loss position:
		Less than 12 Months
		Fair		Unrealized
		Value		Loss
		(in thousands)
	As of July 31, 2014
	Corporate bonds	$	14,101	$	(15	)
	U.S. government agency securities	57,566		(58		)
		$	71,667	$	(73	)
		Less than 12 Months
		Fair		Unrealized
		Value		Loss
		(in thousands)
	As of July 31, 2013
	Corporate bonds	$	51,850	$	(97	)
	U.S. government agency securities	26,611		(11		)
		$	78,461	$	(108	)

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Jul. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements on Recurring Basis	'
	The fair value measurements of the Company’s cash, cash equivalents and short-term investments consisted of the following:
		Level 1			Level 2		Level 3		Total
		(in thousands)
	As of July 31, 2014
	Assets
	Cash and cash equivalents:
	Cash deposits with third-party financial institutions	$	113,303		$	—	$	—	$	113,303
	Money market funds	2,291			—		—		2,291
	Commercial paper	—			3,000		—		3,000
	Short-term investments:
	Corporate bonds	—			55,033		—		55,033
	U.S. government agency securities	—			90,640		—		90,640
	U.S. treasury bills	—			14,577		—		14,577
	Commercial paper	—			4,591		—		4,591
	Municipal notes and bonds	—			1,518		—		1,518
	Total assets measured and recorded at fair value	$	115,594		$	169,359	$	—	$	284,953
		Level 1			Level 2		Level 3		Total
		(in thousands)
	As of July 31, 2013
	Assets
	Cash and cash equivalents:
	Cash deposits with third-party financial institutions	$	129,290		$	—	$	—	$	129,290
	Money market funds	8,612			—		—		8,612
	U.S. government agency securities	3,017			—		—		3,017
	Commercial paper	4,000			—		—		4,000
	Short-term investments:
	Certificates of deposit	5,010			—		—		5,010
	Corporate bonds	—			79,424		—		79,424
	U.S. government agency securities	—			133,827		—		133,827
	U.S. treasury bills	—			36,355		—		36,355
	Commercial paper	—			13,676		—		13,676
	Municipal notes and bonds	—			1,590		—		1,590
	Total assets measured and recorded at fair value	$	149,929		$	264,872	$	—	$	414,801
Changes in Contingent Rights Liability	'
	The following table reflects the change in valuation of the Company's contingent rights liability related to the Azalea acquisition:
		Level 3
		(in thousands)
	As of July 31, 2012	$	1,665
	Changes in fair value	(401		)
	Release of liability upon expiration of the rights	(1,264		)
	As of July 31, 2013	$	—

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	12 Months Ended
	Jul. 31, 2014
Balance Sheet Components [Abstract]	'
Inventory, net	'
		July 31,				July 31,
		2014				2013
		(in thousands)
	Inventory, net
	Raw materials	$	348			$	288
	Finished goods	39,488				28,607
	Total	$	39,836			$	28,895
Property and Equipment, Net	'
		Estimated		July 31,				July 31,
		Useful Lives		2014				2013
		(in thousands, except estimated useful lives)
	Property and Equipment, net
	Computer equipment	2 to 5 years		$	25,779			$	23,109
	Computer software	2 to 5 years		16,675				13,525
	Machinery and equipment	2 to 5 years		36,500				29,009
	Furniture and fixtures	2 to 5 years		4,756				4,304
	Leasehold improvements	1 to 6 years		8,128				5,892
	Total property and equipment, gross			91,838				75,839
	Less: accumulated depreciation and amortization			(64,577		)		(48,303		)
	Total property and equipment, net			$	27,261			$	27,536
Accrued liabilities	'
		July 31,				July 31,
		2014				2013
		(in thousands)
	Accrued Liabilities
	Compensation and benefits	$	37,737			$	25,214
	Marketing	24,782				41,014
	Litigation reserves	250				14,125
	Other	16,722				14,279
	Total	$	79,491			$	94,632
Deferred Revenue	'
		July 31,				July 31,
		2014				2013
		(in thousands)
	Deferred Revenue
	Product	$	50,678			$	38,974
	Support and professional services	84,482				70,791
	Total deferred revenue, current	135,160				109,765
	Product, non-current	3,497				—
	Support and professional services, non-current	41,480				31,578
	Total deferred revenue, non-current	44,977				31,578
	Total deferred revenue	$	180,137			$	141,343

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Jul. 31, 2014
Income Tax Disclosure [Abstract]	'
Income (loss) before income tax provision	'
	Income (loss) before provision for income taxes consists of the following:
		Years ended July 31,
		2014				2013				2012
		(in thousands)
	Domestic	$	6,670			$	(9,807	)		$	54,116
	International	(6,265		)		(418		)		(40,556		)
	Income (loss) before income taxes	$	405			$	(10,225	)		$	13,560
Components of provision for income taxes	'
	The provision for income taxes consists of the following:
		Years ended July 31,
		2014				2013				2012
		(in thousands)
	Current
	Federal	$	26,677			$	16,534			$	2,499
	State	2,017				1,876				3,670
	Foreign	4,450				3,210				2,688
	Total current provision for income taxes	33,144				21,620				8,857
	Deferred
	Federal	(3,484		)		(4,087		)		17,508
	State	(242		)		2,788				(3,563		)
	Foreign	(48		)		1,062				(391		)
	Total deferred provision for income taxes	(3,774		)		(237		)		13,554
	Total provision for income taxes	$	29,370			$	21,383			$	22,411
Differences between provision for income taxes and Company's actual provision for income taxes	'
	The differences between the provision for income taxes computed at the federal statutory rate and the provision for income taxes are as follows:
		Years ended July 31,
		2014			2013			2012
	Federal statutory rate	35	%		(35.0	)%		35	%
	State taxes, net of federal benefit	330.2	%		14	%		3.4	%
	Non-deductible meals and entertainment	69.4	%		2	%		1.9	%
	Change in state effective rate	(66.1	)%		(3.9	)%		(2.9	)%
	IP structure charges, net of tax capitalized	—	%		—	%		75.9	%
	Amortization of deferred tax charge on IP restructuring	1,984.50	%		74.8	%		55.2	%
	Foreign income at other than U.S. rate	2,391.90	%		56	%		(3.0	)%
	Non-deductible stock-based compensation	2,415.90	%		104.8	%		33.6	%
	Non-deductible acquisition-related expenses	272.4	%		2.7	%		0.2	%
	Research and developments credits	(700.1	)%		(53.5	)%		(33.0	)%
	Change in valuation allowance	518.8	%		47.2	%		(1.0	)%
	Effective tax rate	7,251.90	%		209.1	%		165.3	%
Tax effects of temporary differences	'
	Significant components of our deferred tax assets and liabilities are as follows:
		As of July 31,
		2014				2013
		(in thousands)
	Deferred tax assets
	Current
	Net operating loss carryforwards	$	677			$	1,187
	Research and development credits	—				615
	Stock-based compensation	11,109				10,271
	Accruals and reserves	14,249				17,131
	Total deferred tax assets, current	26,035				29,204
	Valuation allowance	(348		)		(128		)
	Net deferred tax assets, current	25,687				29,076
	Non-current
	Net operating loss carryforwards	2,209				2,848
	Research and development credits	14,479				12,378
	Depreciation and amortization	1,782				—
	Stock-based compensation	8,736				9,423
	Accruals and reserves	4,037				3,030
	Total deferred tax assets, non-current	31,243				27,679
	Valuation allowance	(6,480		)		(4,599		)
	Net deferred tax assets, non-current	24,763				23,080
	Total deferred tax assets, net	50,450				52,156
	Deferred tax liabilities
	Current
	Unrealized loss in other comprehensive income	(11		)		—
	Total deferred tax liabilities, current	(11		)		—
	Non-current
	Depreciation and amortization	(801		)		(3,292		)
	Total deferred tax liabilities, non-current	(801		)		(3,292		)
	Total deferred tax liabilities, net	(812		)		(3,292		)
	Total deferred tax assets (liabilities), net	$	49,638			$	48,864
Reconciliation of the beginning and ending amount of the consolidated liability for unrecognized tax benefits	'
	The aggregate changes in the balance of gross unrecognized tax benefits were as follows:
		Years ended July 31,
		2014				2013				2012
	Beginning gross unrecognized tax benefits	$	17,434			$	12,077			$	10,868
	Additions for tax positions related to current year	4,447				5,523				7,444
	Additions for tax positions related to prior year	266				—				—
	Reductions for tax positions related to prior year	—				(166		)		(6,235		)
	Ending gross unrecognized tax benefits	$	22,147			$	17,434			$	12,077

Equity_Incentive_Plans_and_Ben1

Equity Incentive Plans and Benefit Plans (Tables)	12 Months Ended
	Jul. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Shares Available for Grant and Outstanding Stock Option Activity	'
	The following table summarizes the information about shares available for grant and outstanding stock option activity:
					Options Outstanding
		Shares			Number of			Weighted				Weighted		Weighted	Aggregate
		Available for			Shares			Average				Average		Average	Intrinsic
		Grant						Exercise				Fair Value		Remaining	Value (1)
								Price				per Share		Contractual
								per Share						Term (Years)
															(in thousands)
	As of July 31, 2011	274,103			18,164,944			$	6.59					5	$	297,688
	Shares reserved for issuance	5,245,243			—
	Restricted stock awards granted	(7,713,936	)		—
	Restricted stock awards forfeited	1,579,751			—
	Options granted	(177,568	)		177,568			23.71				$	13.08
	Options exercised	—			(3,753,478	)		5.71							$	56,579
	Options cancelled	1,325,003			(1,325,003	)		10.87
	As of July 31, 2012	532,596			13,264,031			$	6.63					3.9	$	112,868
	Shares reserved for issuance	5,576,433			—
	Restricted stock awards granted	(7,252,248	)		—
	Restricted stock awards forfeited	1,393,834			—
	Options exercised	—			(2,860,592	)		6.71							$	38,697
	Options cancelled	306,970			(355,870	)		14.94
	As of July 31, 2013	557,585			10,047,569			$	6.29					2.9	$	121,227
	Shares reserved for issuance	5,670,469
	Restricted stock awards granted	(4,350,155	)
	Restricted stock awards forfeited	1,238,196
	Options exercised	—			(2,778,312	)		3.73							$	42,871
	Options cancelled	131,142			(131,142	)		19.98
	As of July 31, 2014	3,247,237			7,138,115			$	7.03					2	$	82,533
	Options vested and expected to vest as of July 31, 2014 (2)				7,133,364			$	7.02					2	$	82,533
	Options exercisable as of July 31, 2014				7,011,132			$	6.73					2	$	82,529
	-1	The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the fair value of the Company’s common stock on the date of each option exercise.
	-2	Options expected to vest are the result of applying the pre-vesting forfeiture rate assumption to total outstanding options.
Non-Vested Restricted Stock Awards Activity	'
	The following table summarizes the non-vested restricted stock awards and units:
		Shares			Weighted Average
					Grant Date
					Fair Value
					per Share
	As of July 31, 2011	5,093,839			$	20.98
	Awards granted	7,713,936			19.34
	Awards vested	(2,805,343	)		20.29
	Awards forfeited	(1,579,751	)		22.15
	As of July 31, 2012	8,422,681			$	19.49
	Awards granted	7,252,248			18.76
	Awards vested	(3,493,341	)		19.51
	Awards forfeited	(1,393,834	)		20.44
	As of July 31, 2013	10,787,754			$	18.87
	Awards granted	4,350,155			18.67
	Awards vested	(5,009,273	)		19.07
	Awards forfeited	(1,238,196	)		19.28
	As of July 31, 2014	8,890,440			$	18.61
Summary of Employee Stock Purchase Plan	'
	The following table shows for each purchase date, the shares issued and the weighted average purchase price per share:
	Purchase date	September 1, 2012
	Shares issued	348,520
	Weighted average purchase price per share	$	16.65
	Purchase date	March 1, 2013
	Shares issued	489,587
	Weighted average purchase price per share	$	16.74
	Purchase date	September 1, 2013
	Shares issued	432,749
	Weighted average purchase price per share	$	14.12
	Purchase date	March 1, 2014
	Shares issued	656,448
	Weighted average purchase price per share	$	14.12
Employee Stock Option Assumptions	'
	There were no stock options granted during fiscal 2014 and 2013. For fiscal 2012, the fair value of each option grant is estimated on the date of grant using the Black-Scholes model with the following weighted average assumptions:
		Year ended July 31,
		2012
	Risk-free interest rate	1.20%
	Expected term (in years)	4
	Dividend yield	0.00%
	Volatility	74.00%
Employee Stock Purchase Plan Assumptions	'
	The fair value of the purchase right for the Employee Stock Purchase Plan is estimated on the date of grant using the Black-Scholes model with the following weighted average assumptions:
		Years ended July 31,
		2014		2013		2012
	Risk-free interest rates	0.1% to 0.4%		0.1% to 0.3%		0.1% to 0.3%
	Expected term (in years)	0.5 to 2.0		0.5 to 2.0		0.5 to 2.0
	Dividend yield	—%		—%		—%
	Volatility	39.1% to 64.4%		53.8% to 63.0%		56.0% to 77.0%
Stock-Based Compensation Expenses	'
	The following table presents stock-based compensation expense by award-type:
		Years ended July 31,
		2014				2013				2012
		(in thousands)
	Stock options	$	5,014			$	9,648			$	16,879
	Stock awards	97,021				77,064				58,877
	Employee stock purchase plan	9,146				9,514				8,156
	Total	$	111,181			$	96,226			$	83,912

Segment_Information_and_Signif1

Segment Information and Significant Customers (Tables)	12 Months Ended
	Jul. 31, 2014
Segment Reporting [Abstract]	'
Schedule of Total Revenue by Geographic Region	'
	The following table presents total revenue by geographic region:
		Years ended July 31,
		2014				2013				2012
		(in thousands)
	United States	$	476,114			$	379,447			$	323,331
	Europe, Middle East and Africa	132,847				106,427				89,540
	Asia Pacific	102,666				94,361				89,677
	Rest of World	17,306				19,809				14,221
	Total	$	728,933			$	600,044			$	516,769
Significant Channel Partners as Percentage of Total Revenues	'
	The following table presents significant channel partners contributing revenue in excess of 10% of total revenue:
		Years ended July 31,
		2014			2013			2012
	ScanSource, Inc. (“Catalyst”)	20.5	%		20.8	%		21.4	%
	Synnex Corp.	13.2	%		11.6	%		*
	Avnet Logistics U.S. LP	*			*			14.1	%
	(*) Indicates less than 10%.
Summary of Significant Channel Partners as Percentage of Total Accounts Receivable	'
	The following table presents significant channel partners as a percentage of total accounts receivable, net:
		July 31,			July 31,
		2014			2013
	ScanSource, Inc. (“Catalyst”)	17.2	%		21.4	%
	Synnex Corp.	11.8	%		12.1	%
	Avnet Logistics U.S. LP	15.3	%		13.1	%
	Dell Inc.	11.5	%		*
	(*) Indicates less than 10%.
Schedule of Long-lived Assets by Geographic Region	'
	The following table sets forth the Company's property and equipment, net by geographic region based on the location of the asset:
			July 31,				July 31,
			2014				2013
			(in thousands)
	United States		$	18,242			$	19,291
	All other countries		9,019				8,245
	Total		$	27,261			$	27,536

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Jul. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Future Minimum Lease Payments Under Non-Cancelable Operating Leases	'
	At July 31, 2014, future minimum lease payments under non-cancelable operating leases are as follows:
		Operating Leases
		(in thousands)
	Years ending July 31,
	2015	$	8,096
	2016	8,313
	2017	3,189
	2018	1,381
	Total future minimum payments	$	20,979
Changes in Warranty Liability	'
	Changes in the warranty liability are as follows:
		Product Warranty
		(in thousands)
	As of July 31, 2011	$	404
	Changes to the provision	956
	Obligations fulfilled during period	(542		)
	As of July 31, 2012	818
	Changes to the provision	479
	Obligations fulfilled during period	(520		)
	As of July 31, 2013	777
	Changes to the provision	601
	Obligations fulfilled during period	(435		)
	As of July 31, 2014	$	943

Quarterly_Financial_Informatio1

Quarterly Financial Information (unaudited) (Tables)	12 Months Ended
	Jul. 31, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly financial information	'
	The following table presents unaudited quarterly financial information for each of our most recent eight fiscal quarters:
		Fiscal Quarters Ended
		July 31,			April 30,			January 31,			October 31,			July 31,			April 30,			January 31,		October 31,
		2014			2014			2014			2013			2013			2013			2013		2012
		(in thousands, except per share amounts)
	Revenue	$	202,862		$	188,788		$	176,356		$	160,927		$	153,064		$	147,136		$	155,362	$	144,482
	Gross profit	139,879			128,894			123,003			112,376			107,331			103,164			110,706		102,364
	Operating income (loss)	8,463			519			(3,619		)	(5,628		)	(20,345		)	(2,423		)	6,221		4,531
	Net income (loss)	(4,086		)	(6,351		)	(10,702		)	(7,827		)	(15,581		)	(20,191		)	4,990		(826		)
	Net income (loss) per common share, basic	$	(0.04	)	$	(0.06	)	$	(0.10	)	$	(0.07	)	$	(0.14	)	$	(0.18	)	$	0.04	$	(0.01	)
	Net income (loss) per common share, diluted	$	(0.04	)	$	(0.06	)	$	(0.10	)	$	(0.07	)	$	(0.14	)	$	(0.18	)	$	0.04	$	(0.01	)

The_Company_and_its_Significan2

The Company and its Significant Accounting Policies - Additional Information (Detail) (USD $)

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

Jul. 31, 2014

Apr. 30, 2014

Jan. 31, 2014

Oct. 31, 2013

Jul. 31, 2013

Apr. 30, 2013

Jan. 31, 2013

Oct. 31, 2012

Jul. 31, 2014

Jul. 31, 2013

Jul. 31, 2012

Jul. 31, 2014

Jul. 31, 2014

Jul. 31, 2014

Jul. 31, 2014

Jul. 31, 2014

Jul. 31, 2014

Jan. 31, 2014

Jul. 31, 2012

Jul. 31, 2014

Jul. 31, 2012

Jul. 31, 2011

Segment

Support Services [Member]

Professional Services [Member]

Software Development [Member]

Minimum [Member]

Maximum [Member]

Adjustment [Member]

Adjustment [Member]

Adjustment [Member]

Adjustment [Member]

Adjustment [Member]

Adjustment [Member]

Organization and Significant Accounting Policies [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Decrease in revenue

($202,862,000)

($188,788,000)

($176,356,000)

($160,927,000)

($153,064,000)

($147,136,000)

($155,362,000)

($144,482,000)

($728,933,000)

($600,044,000)

($516,769,000)

'

'

'

'

'

$1,500,000

$700,000

'

'

'

$800,000

Increase in provision for income tax

'

'

'

'

'

'

'

'

29,370,000

21,383,000

22,411,000

'

'

'

'

'

'

'

1,800,000

'

'

'

Increase in net loss

4,086,000

6,351,000

10,702,000

7,827,000

15,581,000

20,191,000

-4,990,000

826,000

28,965,000

31,608,000

8,851,000

'

'

'

'

'

900,000

'

1,800,000

400,000

1,800,000

'

Cumulative translation adjustment

'

'

'

'

'

'

'

'

1,500,000

1,500,000

'

'

'

'

'

'

'

'

'

'

'

'

Charges to operations relating to allowance for doubtful accounts

'

'

'

'

'

'

'

'

-101,000

797,000

125,000

'

'

'

'

'

'

'

'

'

'

'

Inventory write-downs

'

'

'

'

'

'

'

'

4,289,000

5,597,000

4,113,000

'

'

'

'

'

'

'

'

'

'

'

Property, plant, and equipment, estimated useful lives (in years)

'

'

'

'

'

'

'

'

'

'

'

'

'

'3 years

'2 years

'6 years

'

'

'

'

'

'

Loss on disposition of assets

'

'

'

'

'

'

'

'

200,000

300,000

500,000

'

'

'

'

'

'

'

'

'

'

'

Capitalized computer software, additions

'

'

'

'

'

'

'

'

1,200,000

3,500,000

'

'

'

'

'

'

'

'

'

'

'

'

Capitalized costs associated with internal-use software

3,300,000

'

'

'

3,300,000

'

'

'

3,300,000

3,300,000

'

'

'

'

'

'

'

'

'

'

'

'

Capitalized computer software, amortization cost

'

'

'

'

'

'

'

'

$1,200,000

$200,000

'

'

'

'

'

'

'

'

'

'

'

'

Estimated economic lives of intangible assets (in years)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1 year

'13 years

'

'

'

'

'

'

Number of reporting units

'

'

'

'

'

'

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

Payment term range, minimum

'

'

'

'

'

'

'

'

'30 days

'

'

'

'

'

'

'

'

'

'

'

'

'

Payment term range, maximum

'

'

'

'

'

'

'

'

'90 days

'

'

'

'

'

'

'

'

'

'

'

'

'

Service contract terms, minimum

'

'

'

'

'

'

'

'

'

'

'

'1 year

'

'

'

'

'

'

'

'

'

'

Service contract terms, maximum

'

'

'

'

'

'

'

'

'

'

'

'5 years

'

'

'

'

'

'

'

'

'

'

Services contract term

'

'

'

'

'

'

'

'

'

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'

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'90 days

'

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'

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'

Business_Combinations_Meridian

Business Combinations - Meridian Apps, Inc. Recognized Identified Assets Acquired and Liabilities Assumed (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	13-May-13	13-May-13	13-May-13	13-May-13	13-May-13
In Thousands, unless otherwise specified				Meridian Apps, Inc. [Member]	Meridian Apps, Inc. [Member]	Meridian Apps, Inc. [Member]	Meridian Apps, Inc. [Member]	Meridian Apps, Inc. [Member]
					Existing technology [Member]	Patent [Member]	Customer contracts and related relationships [Member]	Trade names and trademarks [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'
Tangible assets acquired and liabilities assumed	'	'	'	($1,218)	'	'	'	'
Identifiable intangible assets	'	'	'	'	5,000	2,000	300	400
Total net assets acquired	'	'	'	6,482	'	'	'	'
Goodwill	67,242	67,242	56,947	10,295	'	'	'	'
Total purchase price consideration	'	'	'	$16,777	'	'	'	'
Estimated useful lives (in years)	'	'	'	'	'3 years	'11 years	'4 years	'4 years

Business_Combinations_Avenda_S

Business Combinations - Avenda Systems Consideration Transferred (Details) (Avenda Systems [Member], USD $)	0 Months Ended
In Thousands, except Share data, unless otherwise specified	Nov. 30, 2011
Avenda Systems [Member]	'
Business Acquisition [Line Items]	'
Cash	$23,475
Stock (526,996 shares at $22.77 per share)	12,000
Total purchase price consideration	$35,475
Number of shares issued	526,996
Shares issued, price per share	$22.77

Business_Combinations_Avenda_S1

Business Combinations - Avenda Systems Recognized Identified Assets Acquired and Liabilities Assumed (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Nov. 30, 2011	Nov. 30, 2011	Nov. 30, 2011	Nov. 30, 2011	Nov. 30, 2011
In Thousands, unless otherwise specified				Avenda Systems [Member]	Avenda Systems [Member]	Avenda Systems [Member]	Avenda Systems [Member]	Avenda Systems [Member]
					Existing technology [Member]	Existing technology [Member]	Existing technology [Member]	Customer contracts [Member]
						Minimum [Member]	Maximum [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'
Cash and cash equivalents	'	'	'	$2,389	'	'	'	'
Other Assets	'	'	'	275	'	'	'	'
Total tangible assets acquired	'	'	'	2,664	'	'	'	'
Identifiable intangible assets	'	'	'	'	12,800	'	'	300
Goodwill	67,242	67,242	56,947	23,604	'	'	'	'
Total net assets acquired	'	'	'	39,368	'	'	'	'
Liabilities assumed	'	'	'	-1,784	'	'	'	'
Deferred tax liability	'	'	'	-2,109	'	'	'	'
Total purchase price consideration	'	'	'	$35,475	'	'	'	'
Estimated useful lives (in years)	'	'	'	'	'	'4 years	'7 years	'5 years

Business_Combinations_Other_Ac

Business Combinations - Other Acquisition Recognized Identified Assets Acquired and Liabilities Assumed (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	23-May-12	23-May-12	23-May-12
In Thousands, unless otherwise specified				Other Acquisition [Member]	Other Acquisition [Member]	Other Acquisition [Member]
					Non-compete agreements [Member]	In-process research and development [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Identifiable intangible assets	'	'	'	'	$100	'
In-process research and development	'	'	'	'	'	1,200
Goodwill	67,242	67,242	56,947	200	'	'
Total net assets acquired	'	'	'	1,500	'	'
Liabilities assumed	'	'	'	-81	'	'
Total purchase price consideration	'	'	'	$1,419	'	'
Estimated useful lives (in years)	'	'	'	'	'4 years	'

Business_Combinations_Addition

Business Combinations - Additional Information (Details) (USD $)	Jul. 31, 2013	Jul. 31, 2012	13-May-13	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2013	Nov. 30, 2011	Jul. 31, 2012	23-May-12
			Meridian Apps, Inc. [Member]	Meridian Apps, Inc. [Member]	Meridian Apps, Inc. [Member]	Meridian Apps, Inc. [Member]	Avenda Systems [Member]	Avenda Systems [Member]	Other Acquisition [Member]
				Research and development [Member]	Research and development [Member]	General and administrative [Member]		General and administrative [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'
Cash paid to acquire business	'	'	$16,800,000	'	'	'	$23,475,000	'	$1,400,000
Maximum additional cash compensation	'	'	10,200,000	'	'	'	'	'	'
Payment period for additional cash consideration (in years)	'	'	'3 years	'	'	'	'	'	'
Compensation expense	'	'	'	3,500,000	800,000	'	'	'	'
Acquisition-related costs	'	'	'	'	'	100,000	'	100,000	'
Escrow deposit related to business combination	'	'	'	'	'	'	'	'	300,000
Litigation reserves	$0	$1,665,000	'	'	'	'	'	'	$4,000,000

Contingent_Rights_Liability_De

Contingent Rights Liability (Details) (Azalea Networks [Member], USD $)	0 Months Ended	12 Months Ended
	Sep. 02, 2010	Jul. 31, 2013	Jul. 31, 2012
		Other income, net [Member]	Other income, net [Member]
Business Acquisition [Line Items]	'	'	'
Total purchase price	$42,000,000	'	'
Liability for the estimated fair value of the contingent rights	9,500,000	'	'
Gain from revalidation of contingent rights liability	'	400,000	2,300,000
Contingent consideration liability, release of liability upon expiration of rights	'	$1,300,000	'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Company's Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Goodwill [Roll Forward]	'	'
Beginning Balance	$67,242	$56,947
Goodwill acquired in acquisition of Meridian	'	10,295
Changes in goodwill	0	'
Ending Balance	$67,242	$67,242

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Finite-Lived Intangible Assets, Net [Abstract]	'	'
Gross Value	65,691,000	62,941,000
Accumulated Amortization	-46,186,000	-36,004,000
Net Value	19,505,000	26,937,000
Minimum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'1 year	'
Maximum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'13 years	'
Existing technology [Member]	'	'
Finite-Lived Intangible Assets, Net [Abstract]	'	'
Gross Value	41,383,000	41,383,000
Accumulated Amortization	-29,196,000	-21,269,000
Net Value	12,187,000	20,114,000
Existing technology [Member] | Minimum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'3 years	'3 years
Existing technology [Member] | Maximum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'7 years	'7 years
Patents/core technology [Member]	'	'
Finite-Lived Intangible Assets, Net [Abstract]	'	'
Gross Value	11,796,000	9,046,000
Accumulated Amortization	-5,881,000	-4,784,000
Net Value	5,915,000	4,262,000
Patents/core technology [Member] | Minimum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'2 years	'2 years
Patents/core technology [Member] | Maximum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'13 years	'11 years
Customer contracts [Member]	'	'
Finite-Lived Intangible Assets, Net [Abstract]	'	'
Gross Value	7,533,000	7,533,000
Accumulated Amortization	-6,536,000	-5,537,000
Net Value	997,000	1,996,000
Customer contracts [Member] | Minimum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'4 years	'4 years
Customer contracts [Member] | Maximum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'7 years	'7 years
Support agreements [Member]	'	'
Finite-Lived Intangible Assets, Net [Abstract]	'	'
Gross Value	2,917,000	2,917,000
Accumulated Amortization	-2,839,000	-2,805,000
Net Value	78,000	112,000
Support agreements [Member] | Minimum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'5 years	'5 years
Support agreements [Member] | Maximum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'6 years	'6 years
Tradenames/Trademarks [Member]	'	'
Finite-Lived Intangible Assets, Net [Abstract]	'	'
Gross Value	1,150,000	1,150,000
Accumulated Amortization	-867,000	-767,000
Net Value	283,000	383,000
Tradenames/Trademarks [Member] | Minimum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'1 year	'1 year
Tradenames/Trademarks [Member] | Maximum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'5 years	'5 years
Non-compete agreements [Member]	'	'
Finite-Lived Intangible Assets, Net [Abstract]	'	'
Gross Value	912,000	912,000
Accumulated Amortization	-867,000	-842,000
Net Value	45,000	70,000
Non-compete agreements [Member] | Minimum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'2 years	'2 years
Non-compete agreements [Member] | Maximum [Member]	'	'
Schedule of Intangible Assets by Major Class [Line Items]	'	'
Estimated useful lives (in years)	'4 years	'4 years
In-process research and development [Member]	'	'
Finite-Lived Intangible Assets, Net [Abstract]	'	'
Indefinite Lived Intangible Assets Transferred To Finite Lived Intangible Assets During The Period	1,400,000	'

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Summary of Amortization Expense of Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Finite Lived Intangible Assets Amortization Expense [Line Items]	'	'	'
Amortization expense of intangible assets	$10,182	$7,799	$8,227
Cost of product revenues [Member]	'	'	'
Finite Lived Intangible Assets Amortization Expense [Line Items]	'	'	'
Amortization expense of intangible assets	9,021	6,080	5,875
Cost of support and professional services revenues [Member]	'	'	'
Finite Lived Intangible Assets Amortization Expense [Line Items]	'	'	'
Amortization expense of intangible assets	0	284	540
Sales and marketing [Member]	'	'	'
Finite Lived Intangible Assets Amortization Expense [Line Items]	'	'	'
Amortization expense of intangible assets	1,132	1,410	1,812
Research and development [Member]	'	'	'
Finite Lived Intangible Assets Amortization Expense [Line Items]	'	'	'
Amortization expense of intangible assets	24	25	0
General and administrative [Member]	'	'	'
Finite Lived Intangible Assets Amortization Expense [Line Items]	'	'	'
Amortization expense of intangible assets	$5	$0	$0

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets - Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity	'	'
2015	$8,423	'
2016	4,585	'
2017	1,774	'
2018	1,521	'
2019	787	'
Thereafter	2,415	'
Net Value	$19,505	$26,937

Net_Loss_Per_Common_Share_Comp

Net Loss Per Common Share - Computation of Net Loss Per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Earnings Per Share [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Net loss	($4,086)	($6,351)	($10,702)	($7,827)	($15,581)	($20,191)	$4,990	($826)	($28,965)	($31,608)	($8,851)
Weighted-average common shares outstanding, basic	'	'	'	'	'	'	'	'	108,443	113,284	108,774
Dilutive effect of potential common shares	'	'	'	'	'	'	'	'	0	0	0
Weighted-average common shares outstanding, diluted	'	'	'	'	'	'	'	'	108,443	113,284	108,774
Net loss per share, basic (in dollars per share)	($0.04)	($0.06)	($0.10)	($0.07)	($0.14)	($0.18)	$0.04	($0.01)	($0.27)	($0.28)	($0.08)
Net loss per share, diluted (in dollars per share)	($0.04)	($0.06)	($0.10)	($0.07)	($0.14)	($0.18)	$0.04	($0.01)	($0.27)	($0.28)	($0.08)

Net_Loss_Per_Common_Share_Summ

Net Loss Per Common Share - Summary of Outstanding Stock Options and Awards (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Options to purchase common stock [Member]	'	'	'
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive shares excluded from calculation of diluted net income (loss) per share	7,138	10,048	13,264
Restricted stock awards [Member]	'	'	'
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive shares excluded from calculation of diluted net income (loss) per share	8,890	10,788	8,423
Contingently issuable shares [Member]	'	'	'
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive shares excluded from calculation of diluted net income (loss) per share	629	680	591
Employee stock purchase plan [Member]	'	'	'
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive shares excluded from calculation of diluted net income (loss) per share	111	180	0

ShortTerm_Investments_Summary_

Short-Term Investments - Summary of Short-Term Investments (Detail) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Cost Basis	$166,315	$269,866
Gross Unrealized Gains	117	124
Gross Unrealized Losses	-73	-108
Total short-term investments, fair value	166,359	269,882
Corporate bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cost Basis	54,969	79,493
Gross Unrealized Gains	79	29
Gross Unrealized Losses	-15	-97
Total short-term investments, fair value	55,033	79,425
U.S. government agency securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cost Basis	90,681	133,794
Gross Unrealized Gains	17	43
Gross Unrealized Losses	-58	-11
Total short-term investments, fair value	90,640	133,826
U.S. treasury bills [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cost Basis	14,560	36,317
Gross Unrealized Gains	17	39
Gross Unrealized Losses	0	0
Total short-term investments, fair value	14,577	36,356
Commercial paper [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cost Basis	4,587	13,672
Gross Unrealized Gains	4	3
Gross Unrealized Losses	0	0
Total short-term investments, fair value	4,591	13,675
Certificates of deposit [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cost Basis	'	5,000
Gross Unrealized Gains	'	10
Gross Unrealized Losses	'	0
Total short-term investments, fair value	'	5,010
Municipal notes and bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cost Basis	1,518	1,590
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total short-term investments, fair value	$1,518	$1,590

ShortTerm_Investments_Cost_Bas

Short-Term Investments - Cost Basis and Fair Value of Debt Securities by Contractual Maturity (Detail) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Short-term Investments [Abstract]	'	'
One year or less, Cost Basis	$110,184	$165,614
Over one year and less than two years, Cost Basis	56,131	104,252
Total short-term investments, Cost Basis	166,315	269,866
One year or less, Fair Value	110,280	165,682
Over one year and less than two years, Fair Value	56,079	104,200
Total short-term investments, Fair Value	$166,359	$269,882

ShortTerm_Investments_Addition

Short-Term Investments - Additional information (Detail) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Short-term Investments [Abstract]	'	'
Investments related to credit losses	$0	$0
Securities having unrealized loss position for more than one year	$0	$0

ShortTerm_Investments_Fair_val

Short-Term Investments - Fair value and Gross Unrealized Losses Of Company's Investments (Detail) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, Fair Value	$71,667	$78,461
Less than 12 Months, Unrealized Loss	-73	-108
Corporate bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, Fair Value	14,101	51,850
Less than 12 Months, Unrealized Loss	-15	-97
U.S. government agency securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, Fair Value	57,566	26,611
Less than 12 Months, Unrealized Loss	($58)	($11)

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	12 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
		Private Company 1 [Member]	Azalea Networks [Member]	Azalea Networks [Member]
			Other income, net [Member]	Other income, net [Member]
Fair Value Disclosures [Line Items]	'	'	'	'
Maximum maturity period of cash and cash equivalents	'90 days	'	'	'
Gain from revalidation of contingent rights liability	'	'	$0.40	$2.30
Contingent consideration liability, release of liability upon expiration of rights	'	'	1.3	'
Investment in privately-held company	'	$1.80	'	'

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments - Fair Value Measurement on Recurring Basis (Detail) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Short-term investments, fair value	$166,359	$269,882
Certificates of deposit [Member]	'	'
Assets	'	'
Short-term investments, fair value	'	5,010
Corporate bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	55,033	79,425
U.S. government agency securities [Member]	'	'
Assets	'	'
Short-term investments, fair value	90,640	133,826
U.S. treasury bills [Member]	'	'
Assets	'	'
Short-term investments, fair value	14,577	36,356
Municipal notes and bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	1,518	1,590
Level 1 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Total assets measured and recorded at fair value	115,594	149,929
Level 1 [Member] | Fair Value, Measurements Recurring [Member] | Certificates of deposit [Member]	'	'
Assets	'	'
Short-term investments, fair value	'	5,010
Level 1 [Member] | Fair Value, Measurements Recurring [Member] | Corporate bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Level 1 [Member] | Fair Value, Measurements Recurring [Member] | U.S. government agency securities [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Level 1 [Member] | Fair Value, Measurements Recurring [Member] | U.S. treasury bills [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Level 1 [Member] | Fair Value, Measurements Recurring [Member] | Commercial paper [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Level 1 [Member] | Fair Value, Measurements Recurring [Member] | Municipal notes and bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Level 2 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Total assets measured and recorded at fair value	169,359	264,872
Level 2 [Member] | Fair Value, Measurements Recurring [Member] | Certificates of deposit [Member]	'	'
Assets	'	'
Short-term investments, fair value	'	0
Level 2 [Member] | Fair Value, Measurements Recurring [Member] | Corporate bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	55,033	79,424
Level 2 [Member] | Fair Value, Measurements Recurring [Member] | U.S. government agency securities [Member]	'	'
Assets	'	'
Short-term investments, fair value	90,640	133,827
Level 2 [Member] | Fair Value, Measurements Recurring [Member] | U.S. treasury bills [Member]	'	'
Assets	'	'
Short-term investments, fair value	14,577	36,355
Level 2 [Member] | Fair Value, Measurements Recurring [Member] | Commercial paper [Member]	'	'
Assets	'	'
Short-term investments, fair value	4,591	13,676
Level 2 [Member] | Fair Value, Measurements Recurring [Member] | Municipal notes and bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	1,518	1,590
Level 3 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Total assets measured and recorded at fair value	0	0
Level 3 [Member] | Fair Value, Measurements Recurring [Member] | Certificates of deposit [Member]	'	'
Assets	'	'
Short-term investments, fair value	'	0
Level 3 [Member] | Fair Value, Measurements Recurring [Member] | Corporate bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Level 3 [Member] | Fair Value, Measurements Recurring [Member] | U.S. government agency securities [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Level 3 [Member] | Fair Value, Measurements Recurring [Member] | U.S. treasury bills [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Level 3 [Member] | Fair Value, Measurements Recurring [Member] | Commercial paper [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Level 3 [Member] | Fair Value, Measurements Recurring [Member] | Municipal notes and bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	0	0
Total [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Total assets measured and recorded at fair value	284,953	414,801
Total [Member] | Fair Value, Measurements Recurring [Member] | Certificates of deposit [Member]	'	'
Assets	'	'
Short-term investments, fair value	'	5,010
Total [Member] | Fair Value, Measurements Recurring [Member] | Corporate bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	55,033	79,424
Total [Member] | Fair Value, Measurements Recurring [Member] | U.S. government agency securities [Member]	'	'
Assets	'	'
Short-term investments, fair value	90,640	133,827
Total [Member] | Fair Value, Measurements Recurring [Member] | U.S. treasury bills [Member]	'	'
Assets	'	'
Short-term investments, fair value	14,577	36,355
Total [Member] | Fair Value, Measurements Recurring [Member] | Commercial paper [Member]	'	'
Assets	'	'
Short-term investments, fair value	4,591	13,676
Total [Member] | Fair Value, Measurements Recurring [Member] | Municipal notes and bonds [Member]	'	'
Assets	'	'
Short-term investments, fair value	1,518	1,590
Cash deposits with third-party financial institutions [Member] | Level 1 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	113,303	129,290
Cash deposits with third-party financial institutions [Member] | Level 2 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	0	0
Cash deposits with third-party financial institutions [Member] | Level 3 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	0	0
Cash deposits with third-party financial institutions [Member] | Total [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	113,303	129,290
Money market funds [Member] | Level 1 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	2,291	8,612
Money market funds [Member] | Level 2 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	0	0
Money market funds [Member] | Level 3 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	0	0
Money market funds [Member] | Total [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	2,291	8,612
U.S. government agency securities [Member] | Level 1 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	'	3,017
U.S. government agency securities [Member] | Level 2 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	'	0
U.S. government agency securities [Member] | Level 3 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	'	0
U.S. government agency securities [Member] | Total [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	'	3,017
Commercial paper [Member] | Level 1 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	0	4,000
Commercial paper [Member] | Level 2 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	3,000	0
Commercial paper [Member] | Level 3 [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	0	0
Commercial paper [Member] | Total [Member] | Fair Value, Measurements Recurring [Member]	'	'
Assets	'	'
Cash and cash equivalents, fair value	$3,000	$4,000

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments - Changes in Contingent Rights Liability (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2013
Change in Contingent Rights Liability [Roll Forward]	'
As of July 31, 2012	$1,665
Changes in fair value	-401
Release of liability upon expiration of the rights	-1,264
As of July 31, 2013	$0

Balance_Sheet_Components_Detai

Balance Sheet Components - Details of Selected Balance Sheet Items (Detail) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Inventory, net	'	'
Raw materials	$348	$288
Finished goods	39,488	28,607
Total	39,836	28,895
Accrued Liabilities	'	'
Compensation and benefits	37,737	25,214
Marketing	24,782	41,014
Litigation reserves	250	14,125
Other	16,722	14,279
Total	$79,491	$94,632

Balance_Sheet_Components_Prope

Balance Sheet Components - Property and Equipment, net (Detail) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	$91,838,000	$75,839,000	'
Less: Accumulated depreciation	-64,577,000	-48,303,000	'
Total property and equipment, net	27,261,000	27,536,000	'
Depreciation and amortization expense	19,300,000	15,900,000	10,900,000
Minimum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'2 years	'	'
Maximum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'6 years	'	'
Computer equipment [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	25,779,000	23,109,000	'
Computer equipment [Member] | Minimum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'2 years	'2 years	'
Computer equipment [Member] | Maximum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'5 years	'5 years	'
Computer software[Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	16,675,000	13,525,000	'
Computer software[Member] | Minimum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'2 years	'2 years	'
Computer software[Member] | Maximum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'5 years	'5 years	'
Machinery and equipment [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	36,500,000	29,009,000	'
Machinery and equipment [Member] | Minimum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'2 years	'2 years	'
Machinery and equipment [Member] | Maximum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'5 years	'5 years	'
Furniture and fixtures [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	4,756,000	4,304,000	'
Furniture and fixtures [Member] | Minimum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'2 years	'2 years	'
Furniture and fixtures [Member] | Maximum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'5 years	'5 years	'
Leasehold improvements [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	$8,128,000	$5,892,000	'
Leasehold improvements [Member] | Minimum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'1 year	'1 year	'
Leasehold improvements [Member] | Maximum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful lives (in years)	'6 years	'6 years	'

Balance_Sheet_Components_Defer

Balance Sheet Components - Deferred Revenue (Detail) (USD $)	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2014
In Thousands, unless otherwise specified			Product [Member]	Product [Member]	Support and professional services [Member]	Support and professional services [Member]	Minimum [Member]	Maximum [Member]
Deferred Revenue Arrangement [Line Items]	'	'	'	'	'	'	'	'
Deferred revenue, current	$135,160	$109,765	$50,678	$38,974	$84,482	$70,791	'	'
Deferred revenue, non-current	44,977	31,578	3,497	0	41,480	31,578	'	'
Total deferred revenue	$180,137	$141,343	'	'	'	'	'	'
Support period of deferred professional services and support revenue (in years)	'	'	'	'	'	'	'1 year	'5 years

Income_Taxes_Income_Before_Inc

Income Taxes - Income Before Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Income Tax Disclosure [Abstract]	'	'	'
Domestic	$6,670	($9,807)	$54,116
International	-6,265	-418	-40,556
Income (loss) before income taxes	$405	($10,225)	$13,560

Income_Taxes_Provision_for_Ben

Income Taxes - Provision for (Benefit from) Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Current	'	'	'
Federal	$26,677	$16,534	$2,499
State	2,017	1,876	3,670
Foreign	4,450	3,210	2,688
Total current provision for income taxes	33,144	21,620	8,857
Deferred	'	'	'
Federal	-3,484	-4,087	17,508
State	-242	2,788	-3,563
Foreign	-48	1,062	-391
Total deferred provision for income taxes	-3,774	-237	13,554
Total provision for income taxes	$29,370	$21,383	$22,411

Income_Taxes_Effective_Income_

Income Taxes - Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Differences between provision for income taxes and Company's actual provision for income taxes	'	'	'
Federal statutory rate	35.00%	-35.00%	35.00%
State taxes, net of federal benefit	330.20%	14.00%	3.40%
Non-deductible meals and entertainment	69.40%	2.00%	1.90%
Change in state effective rate	-66.10%	-3.90%	-2.90%
IP structure charges, net of tax capitalized	0.00%	0.00%	75.90%
Amortization of deferred tax charge on IP restructuring	1984.50%	74.80%	55.20%
Foreign income at other than U.S. rate	2391.90%	56.00%	-3.00%
Non-deductible stock-based compensation	2415.90%	104.80%	33.60%
Non-deductible acquisition-related expenses	272.40%	2.70%	0.20%
Research and developments credits	-700.10%	-53.50%	-33.00%
Change in valuation allowance	518.80%	47.20%	-1.00%
Effective tax rate	7251.90%	209.10%	165.30%

Income_Taxes_Deferred_Tax_Asse

Income Taxes - Deferred Tax Assets and Liabilities (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Deferred Tax Assets, Net [Abstract]	'	'
Total deferred tax assets, net	$50,450	$52,156
Deferred Tax Liabilities, Net [Abstract]	'	'
Unrealized loss in other comprehensive income	-11	0
Total deferred tax liabilities, current	-11	0
Depreciation and amortization	-801	-3,292
Total deferred tax liabilities, non-current	-801	-3,292
Total deferred tax liabilities, non-current	-812	-3,292
Total deferred tax assets (liabilities), net	49,638	48,864
Current [Member]	'	'
Deferred Tax Assets, Net [Abstract]	'	'
Net operating loss carryforwards	677	1,187
Research and development credits	0	615
Stock-based compensation	11,109	10,271
Accruals and reserves	14,249	17,131
Total deferred tax assets, non-current	26,035	29,204
Valuation allowance	-348	-128
Total deferred tax assets, net	25,687	29,076
Noncurrent [Member]	'	'
Deferred Tax Assets, Net [Abstract]	'	'
Net operating loss carryforwards	2,209	2,848
Research and development credits	14,479	12,378
Depreciation and amortization	1,782	0
Stock-based compensation	8,736	9,423
Accruals and reserves	4,037	3,030
Total deferred tax assets, non-current	31,243	27,679
Valuation allowance	-6,480	-4,599
Total deferred tax assets, net	$24,763	$23,080

Income_Taxes_Changes_in_Gross_

Income Taxes - Changes in Gross Unrealized Tax Benefits (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Reconciliation of the beginning and ending amount of the consolidated liability for unrecognized tax benefits	'	'	'
Beginning gross unrecognized tax benefits	$17,434	$12,077	$10,868
Additions for tax positions related to current year	4,447	5,523	7,444
Additions for tax positions related to prior year	266	0	0
Reductions for tax positions related to prior year	0	-166	-6,235
Ending gross unrecognized tax benefits	$22,147	$17,434	$12,077

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Details) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Operating Loss Carryforwards [Line Items]	'	'	'	'
Tax benefit for research and development credit	'	'	$1,900,000	'
Excess tax benefits associated with share-based compensation deductions	18,800,000	9,900,000	21,600,000	'
Potential tax benefit from operating loss carryforwards	47,800,000	'	'	'
Income tax liabilities on foreign undistributed earnings	23,400,000	'	'	'
Unrecognized tax benefits	22,147,000	17,434,000	12,077,000	10,868,000
Federal [Member]	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Operating loss carryforwards	131,000,000	'	'	'
Federal [Member] | Research Tax Credit Carryforward [Member]	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Tax credit carryforward, amount	22,800,000	'	'	'
State [Member]	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Operating loss carryforwards	131,000,000	'	'	'
State [Member] | Research Tax Credit Carryforward [Member]	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Tax credit carryforward, amount	28,700,000	'	'	'
State [Member] | Research Tax Credit Earned During Year [Member]	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Increase in valuation allowance	$2,000,000	'	'	'

Equity_Incentive_Plans_and_Ben2

Equity Incentive Plans and Benefit Plans - Shares Available for Grant and Outstanding Stock Option Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Jul. 31, 2014		Jul. 31, 2013		Jul. 31, 2012		Jul. 31, 2011
Shares Available for Grant:	'		'		'		'
Beginning balance	557,585		532,596		274,103		'
Shares reserved for issuance	5,670,469		5,576,433		5,245,243		'
Restricted stock awards granted	-4,350,155		-7,252,248		-7,713,936		'
Restricted stock awards forfeited	1,238,196		1,393,834		1,579,751		'
Options granted,	'		'		-177,568		'
Options cancelled	131,142		306,970		1,325,003		'
Ending balance	3,247,237		557,585		532,596		274,103
Options Outstanding, Number of shares:	'		'		'		'
Beginning balance	10,047,569		13,264,031		18,164,944		'
Options granted	0		0		177,568		'
Options exercised	-2,778,312		-2,860,592		-3,753,478		'
Options cancelled	-131,142		-355,870		-1,325,003		'
Ending balance	7,138,115		10,047,569		13,264,031		18,164,944
Number of options vested and expected to vest	7,133,364	[1]	'		'		'
Number of options exercisable	7,011,132		'		'		'
Options Outstanding, Weighted Average Exercise Price Per Share (in dollars per share):	'		'		'		'
Beginning balance	$6.29		$6.63		$6.59		'
Options granted	'		'		$23.71		'
Options exercised	$3.73		$6.71		$5.71		'
Options cancelled	$19.98		$14.94		$10.87		'
Ending balance	$7.03		$6.29		$6.63		$6.59
Options vested and expected to vest	$7.02	[1]	'		'		'
Options exercisable	$6.73		'		'		'
Options Outstanding, Options granted, Weighted Average Fair Value per Share	'		'		$13.08		'
Weighted average remaining contractual term (in years)	'2 years		'2 years 10 months 24 days		'3 years 10 months 24 days		'5 years
Options vested and expected to vest, weighted average remaining contractual term	'2 years	[1]	'		'		'
Options exercisable, weighted average remaining contractual term	'2 years		'		'		'
Aggregate Intrinsic Value:	'		'		'		'
Beginning balance	$121,227	[2]	$112,868	[2]	$297,688	[2]	'
Options exercised	42,871	[2]	38,697	[2]	56,579	[2]	'
Ending balance	82,533	[2]	121,227	[2]	112,868	[2]	297,688	[2]
Options vested and expected to vest	82,533	[1],[2]	'		'		'
Options exercisable	$82,529	[2]	'		'		'
[1]	Options expected to vest are the result of applying the pre-vesting forfeiture rate assumption to total outstanding options.
[2]	The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the fair value of the Company’s common stock on the date of each option exercise.

Equity_Incentive_Plans_and_Ben3

Equity Incentive Plans and Benefit Plans - Non-Vested Restricted Stock Awards Activity (Detail) (Restricted Stock [Member], USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]	'	'	'
Shares, Beginning Balance	10,787,754	8,422,681	5,093,839
Awards granted	4,350,155	7,252,248	7,713,936
Awards vested	-5,009,273	-3,493,341	-2,805,343
Awards forfeited	-1,238,196	-1,393,834	-1,579,751
Shares, Ending Balance	8,890,440	10,787,754	8,422,681
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]	'	'	'
Weighted Average Grant Date Fair Value per Share, Beginning Balance	$18.87	$19.49	$20.98
Awards granted	$18.67	$18.76	$19.34
Awards vested	$19.07	$19.51	$20.29
Awards forfeited	$19.28	$20.44	$22.15
Weighted Average Grant Date Fair Value per Share, Ending Balance	$18.61	$18.87	$19.49

Equity_Incentive_Plans_and_Ben4

Equity Incentive Plans and Benefit Plans - Employee Stock Purchase Plan Activity (Details) (USD $)	0 Months Ended
	Mar. 02, 2013	Sep. 02, 2012	Mar. 02, 2012	Sep. 02, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'	'	'
Shares issued	656,448	432,749	489,587	348,520
Weighted average purchase price per share	$14.12	$14.12	$16.74	$16.65

Equity_Incentive_Plans_and_Ben5

Equity Incentive Plans and Benefit Plans - Employee Stock Option Assumptions (Detail)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Dividend yield	0.00%	0.00%	0.00%
Stock Options [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Risk-free interest rate	'	'	1.20%
Expected term (in years)	'	'	'4 years
Dividend yield	'	'	0.00%
Volatility	'	'	74.00%

Equity_Incentive_Plans_and_Ben6

Equity Incentive Plans and Benefit Plans - Employee Stock Purchase Plan Assumptions (Detail)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Risk-free interest rates, Minimum	0.10%	0.10%	0.10%
Risk-free interest rates, Maximum	0.40%	0.30%	0.30%
Dividend yield	0.00%	0.00%	0.00%
Volatility, Minimum	39.10%	53.80%	56.00%
Volatility, Maximum	64.40%	63.00%	77.00%
Minimum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term (in years)	'6 months	'6 months	'6 months
Maximum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term (in years)	'2 years	'2 years	'2 years

Equity_Incentive_Plans_and_Ben7

Equity Incentive Plans and Benefit Plans - Stock-Based Compensation Expenses (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'	'
Stock options	$5,014	$9,648	$16,879
Stock awards	97,021	77,064	58,877
Employee stock purchase plan	9,146	9,514	8,156
Stock-based compensation expense	$111,181	$96,226	$83,912

Equity_Incentive_Plans_and_Ben8

Equity Incentive Plans and Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Feb. 20, 2014	Oct. 09, 2013	Jul. 15, 2013	Jun. 13, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'
Stock-based compensation expense	$111,181,000	$96,226,000	$83,912,000	'	'	'	'
Total unrecognized compensation cost, net of forfeitures, related to nonvested stock options	1,300,000	'	'	'	'	'	'
Offering period to eligible employees	'2 years	'	'	'	'	'	'
Purchase period of stock	'6 months	'	'	'	'	'	'
Percentage of contribution allowed to each employee	15.00%	'	'	'	'	'	'
Purchase price under employee stock purchase plan	85.00%	'	'	'	'	'	'
Purchase limit of common stock value	25,000	'	'	'	'	'	'
Purchase limit of common stock shares	3,000	'	'	'	'	'	'
Common stock reserved for future issuance under the ESPP	5,868,790	'	'	'	'	'	'
Options grants in period	0	0	177,568	'	'	'	'
Fair value of options and share awards vested	105,200,000	78,600,000	75,900,000	'	'	'	'
Stock repurchase program	500,000,000	'	'	200,000,000	100,000,000	100,000,000	100,000,000
Total cumulative repurchase of shares	14,729,540	5,311,332	'	'	'	'	'
Total purchase price	263,000,000	86,200,000	'	'	'	'	'
Remaining authorized amount under repurchase program	130,900,000	'	'	'	'	'	'
Stock Options [Member]	'	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'
Vesting period stock options	'4 years	'	'	'	'	'	'
Weighted- average period of compensation cost	'8 months 12 days	'	'	'	'	'	'
Stock Options [Member] | Minimum [Member]	'	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'
Expiring period of stock options	'7 years	'	'	'	'	'	'
Stock Options [Member] | Maximum [Member]	'	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'
Expiring period of stock options	'10 years	'	'	'	'	'	'
Restricted Stock Units (RSUs) [Member]	'	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'
Total unrecognized compensation cost, net of forfeitures, related to nonvested stock options	118,900,000	'	'	'	'	'	'
Weighted- average period of compensation cost	'2 years 4 months 24 days	'	'	'	'	'	'
Fair value of the awards granted on restricted stock	81,200,000	136,100,000	149,200,000	'	'	'	'
2007 Plan [Member]	'	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'
Annual increase in authorized shares as a percentage of outstanding common stock	5.00%	'	'	'	'	'	'
Annual increase, number of additional shares authorized	15,000,000	'	'	'	'	'	'
Performance period for bonus plan	'6 months	'	'	'	'	'	'
Bonus Plan [Member]	'	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'
Stock-based compensation expense	$22,000,000	$13,100,000	$8,100,000	'	'	'	'

Segment_Information_and_Signif2

Segment Information and Significant Customers - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
	Segment
Segment Reporting [Abstract]	'	'	'
Number of reportable segments	1	'	'
Number of operating segments	1	'	'
Product revenue	$595,375	$496,343	$434,733
Professional services and support revenue	$133,558	$103,701	$82,036

Segment_Information_and_Signif3

Segment Information and Significant Customers - Schedule of Total Revenue by Geographic Region (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Revenue, Major Customer [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenue	$202,862	$188,788	$176,356	$160,927	$153,064	$147,136	$155,362	$144,482	$728,933	$600,044	$516,769
United States [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	476,114	379,447	323,331
Europe, Middle East and Africa [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	132,847	106,427	89,540
Asia Pacific [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	102,666	94,361	89,677
Rest of World [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	$17,306	$19,809	$14,221

Segment_Information_and_Signif4

Segment Information and Significant Customers - Significant Channel Partners as Percentage of Total Revenues (Detail)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
ScanSource, Inc. ("Catalyst") [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Significant channel partners as a percentage of total revenues	20.50%	20.80%	21.40%
Synnex Corp. [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Significant channel partners as a percentage of total revenues	13.20%	11.60%	'
Avnet Logistics U.S LP [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Significant channel partners as a percentage of total revenues	'	'	14.10%

Segment_Information_and_Signif5

Segment Information and Significant Customers - Summary of Significant Channel Partners as Percentage of Total Accounts Receivable (Detail)	Jul. 31, 2014	Jul. 31, 2013
ScanSource, Inc. ("Catalyst") [Member]	'	'
Revenue, Major Customer [Line Items]	'	'
Significant channel partners as a percentage of total accounts receivable	17.20%	21.40%
Synnex Corp. [Member]	'	'
Revenue, Major Customer [Line Items]	'	'
Significant channel partners as a percentage of total accounts receivable	11.80%	12.10%
Avnet Logistics U.S LP [Member]	'	'
Revenue, Major Customer [Line Items]	'	'
Significant channel partners as a percentage of total accounts receivable	15.30%	13.10%
Dell Inc. [Member]	'	'
Revenue, Major Customer [Line Items]	'	'
Significant channel partners as a percentage of total accounts receivable	11.50%	'

Segment_Information_and_Signif6

Segment Information and Significant Customers - Schedule of Long-lived Assets by Geographic Region (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Long-lived assets	$27,261	$27,536
United States [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Long-lived assets	18,242	19,291
All other countries [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Long-lived assets	$9,019	$8,245

Commitments_and_Contingencies_1

Commitments and Contingencies - Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Detail) (USD $)	Jul. 31, 2014
In Thousands, unless otherwise specified
Commitments and Contingencies Disclosure [Abstract]	'
2015	$8,096
2016	8,313
2017	3,189
2018	1,381
Total future minimum payments	$20,979

Commitments_and_Contingencies_2

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended
In Millions, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Nov. 30, 2009
				Nomadix, Inc v. Hewlett Packard Company et al. [Member]
				patent
Loss Contingencies [Line Items]	'	'	'	'
Number of patents allegedly infringed	'	'	'	1
Litigation reserves	$0.30	$14	'	'
Rent expense	8.5	7.2	5.6	'
Non-cancelable purchase commitments	$45.40	$40	'	'
Hardware warranty period	'1 year	'	'	'
Software warranty period	'90 days	'	'	'

Commitments_and_Contingencies_3

Commitments and Contingencies - Changes in Warranty Liability (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]	'	'	'
Beginning Balance	$777	$818	$404
Changes to the provision	601	479	956
Obligations fulfilled during period	-435	-520	-542
Ending Balance	$943	$777	$818

Quarterly_Financial_Informatio2

Quarterly Financial Information (unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Quarterly Financial Information Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Revenue	$202,862	$188,788	$176,356	$160,927	$153,064	$147,136	$155,362	$144,482	$728,933	$600,044	$516,769
Gross profit	139,879	128,894	123,003	112,376	107,331	103,164	110,706	102,364	504,152	423,565	365,331
Operating income (loss)	8,463	519	-3,619	-5,628	-20,345	-2,423	6,221	4,531	-265	-12,016	10,735
Net income (loss)	($4,086)	($6,351)	($10,702)	($7,827)	($15,581)	($20,191)	$4,990	($826)	($28,965)	($31,608)	($8,851)
Net income (loss) per common share, basic (in dollars per share)	($0.04)	($0.06)	($0.10)	($0.07)	($0.14)	($0.18)	$0.04	($0.01)	($0.27)	($0.28)	($0.08)
Net income (loss) per common share, diluted (in dollars per share)	($0.04)	($0.06)	($0.10)	($0.07)	($0.14)	($0.18)	$0.04	($0.01)	($0.27)	($0.28)	($0.08)

Subsequent_Events_Details

Subsequent Events (Details) (Restructuring Plan Aug 2014 [Member], Subsequent Event [Member], USD $)	0 Months Ended
In Millions, unless otherwise specified	Aug. 22, 2014
	Quarter
	Position
Subsequent Event [Line Items]	'
Expected number of positions eliminated, percent	3.70%
Expected number of positions eliminated	66
Expected number of positions relocated, percent	4.20%
Expected number of positions relocated	75
Number of quarters in next fiscal year restructuring charges to be expensed	3
Minimum [Member]	'
Subsequent Event [Line Items]	'
Expected restructuring cost	6
Maximum [Member]	'
Subsequent Event [Line Items]	'
Expected restructuring cost	8
Other costs [Member] | Minimum [Member]	'
Subsequent Event [Line Items]	'
Expected restructuring cost	2.3
Other costs [Member] | Maximum [Member]	'
Subsequent Event [Line Items]	'
Expected restructuring cost	4.3

Schedule_II_Valuation_and_Qual1

Schedule II Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Allowance for Doubtful Accounts [Member]	'	'	'
Movement in Valuation Allowances and Reserves [Roll Forward]	'	'	'
Balance at beginning of period	$805	$276	$306
Net Additions	-101	737	125
Deductions	-371	-208	-155
Balance at end of period	333	805	276
Sales Returns [Member]	'	'	'
Movement in Valuation Allowances and Reserves [Roll Forward]	'	'	'
Balance at beginning of period	1,313	647	286
Net Additions	1,680	994	1,051
Deductions	-1,893	-328	-690
Balance at end of period	1,100	1,313	647
Valuation Allowance on Deferred Tax Assets [Member]	'	'	'
Movement in Valuation Allowances and Reserves [Roll Forward]	'	'	'
Balance at beginning of period	4,727	87	235
Net Additions	2,101	4,727	0
Deductions	0	-87	-148
Balance at end of period	$6,828	$4,727	$87