Infoblox 10-K 25 Sep 14 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Jul. 31, 2014	Aug. 31, 2014	Jan. 31, 2014
Document and Entity Information [Abstract]	'	'	'
Entity Registrant Name	'INFOBLOX INC	'	'
Entity Central Index Key	'0001223862	'	'
Current Fiscal Year End Date	'--07-31	'	'
Entity Filer Category	'Accelerated Filer	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Jul-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'FY	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding	'	55,115,220	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Public Float	'	'	$1.30

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
CURRENT ASSETS:	'	'
Cash and cash equivalents	$78,535	$69,828
Short-term investments	191,316	139,508
Accounts receivable, net of allowances of $464 at July 31, 2014 and $581 at July 31, 2013	36,420	38,728
Inventory	6,345	4,478
Deferred tax assets	285	1,354
Prepaid expenses and other current assets	7,221	6,023
Total current assets	320,122	259,919
Property and equipment, net	18,785	18,370
Restricted cash	3,516	3,508
Intangible assets, net	4,096	5,494
Goodwill	33,293	32,726
Other assets	756	443
TOTAL ASSETS	380,568	320,460
CURRENT LIABILITIES:	'	'
Accounts payable and accrued liabilities	15,648	12,387
Accrued compensation	13,197	12,472
Deferred revenue, net	81,964	68,479
Total current liabilities	110,809	93,338
Deferred revenue, net	34,149	29,693
Deferred tax liability	285	1,055
Other liabilities	6,029	6,821
TOTAL LIABILITIES	151,272	130,907
Commitments and contingencies (Note 8)	'	'
STOCKHOLDERS' EQUITY:	'	'
Convertible preferred stock, $0.0001 par value per share—5,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.0001 par value per share—100,000 shares authorized; 55,065 shares and 51,670 shares issued and outstanding as of July 31, 2014 and July 31, 2013	6	5
Additional paid-in capital	365,833	302,101
Accumulated other comprehensive loss	-84	-11
Accumulated deficit	-136,459	-112,542
TOTAL STOCKHOLDERS' EQUITY	229,296	189,553
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$380,568	$320,460

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, net of allowances	$464	$581
Convertible preferred stock, par value	$0.00	$0.00
Convertible preferred stock, shares authorized	5,000,000	5,000,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	55,065,000	51,670,000
Common stock, shares outstanding	55,065,000	51,670,000

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
Net revenue:	'	'	'
Products and licenses	$130,348	$128,203	$95,012
Services	119,992	96,841	74,234
Total net revenue	250,340	225,044	169,246
Cost of revenue:	'	'	'
Products and licenses	29,327	29,228	21,778
Services	26,471	19,025	15,342
Total cost of revenue	55,798	48,253	37,120
Gross profit	194,542	176,791	132,126
Operating expenses:	'	'	'
Research and development	49,289	43,056	36,624
Sales and marketing	138,612	112,385	86,474
General and administrative	29,621	24,488	15,548
Total operating expenses	217,522	179,929	138,646
Loss from operations	-22,980	-3,138	-6,520
Other expense, net	-18	-618	-946
Loss before provision for income taxes	-22,998	-3,756	-7,466
Provision for income taxes	919	650	744
Net loss	($23,917)	($4,406)	($8,210)
Net loss per share - basic and diluted	($0.45)	($0.09)	($0.40)
Weighted-average shares used in computing net loss per share - basic and diluted	53,581	48,494	20,563

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Loss Statement (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Statement of Other Comprehensive Income (Loss) [Abstract]	'	'	'
Net loss	($23,917)	($4,406)	($8,210)
Unrealized holding loss on short-term investments, net	-73	-11	0
Comprehensive loss	($23,990)	($4,417)	($8,210)

Consolidated_Statements_of_Con

Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (USD $)	Total	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	IPO [Member]	IPO [Member]	Convertible Preferred Stock [Member]	Convertible Preferred Stock [Member]	Common Stock [Member]	Common Stock [Member]
In Thousands, except Share data, unless otherwise specified						Additional Paid-in Capital [Member]		IPO [Member]		IPO [Member]
Balance at at Jul. 31, 2011	($69,032)	$30,893	$0	($99,926)	'	'	$107,506	'	$1	'
Balance at (in shares) at Jul. 31, 2011	'	'	'	'	'	'	80,512,000	'	11,039,000	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'	'	'
Stock-based compensation	10,652	10,652	'	'	'	'	'	'	'	'
Issuance of common stock upon exercise of stock options	1,912	1,912	'	'	'	'	'	'	'	'
Issuance of common stock upon exercise of stock options (in shares)	'	'	'	'	'	'	'	'	629,000	'
Conversion of preferred stock warrants to common stock warrants upon IPO	789	789	'	'	'	'	'	'	'	'
Vesting of early exercised common stock options	221	221	'	'	'	'	'	'	'	'
Net unrealized holding loss on short-term investments	0	'	'	'	'	'	'	'	'	'
Excess tax benefit from employee stock plans	47	47	'	'	'	'	'	'	'	'
Net loss	-8,210	'	'	-8,210	'	'	'	'	'	'
Balance at at Jul. 31, 2012	142,075	250,206	0	-108,136	'	'	0	'	5	'
Balance at (in shares) at Jul. 31, 2012	'	'	'	'	'	'	0	'	45,738,000	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'	'	'
Stock-based compensation	21,983	21,983	'	'	'	'	'	'	'	'
Issuance of common stock upon exercise of stock options	21,392	21,392	'	'	'	'	'	'	'	'
Issuance of common stock upon exercise of stock options (in shares)	'	'	'	'	'	'	'	'	5,320,000	'
Issuance of common stock in connection with the ESPP	7,887	7,887	'	'	'	'	'	'	'	'
Issuance of common stock in connection with the ESPP (in shares)	'	'	'	'	'	'	'	'	571,000	'
Issuance of common stock upon vesting of restricted stock units	0	0	'	'	'	'	'	'	'	'
Issuance of common stock upon vesting of restricted stock units (in shares)	'	'	'	'	'	'	'	'	25,000	'
Vesting of early exercised common stock options	224	224	'	'	'	'	'	'	'	'
Other (in shares)	0	'	'	'	'	'	'	'	16,000	'
Net unrealized holding loss on short-term investments	-11	'	-11	'	'	'	'	'	'	'
Excess tax benefit from employee stock plans	409	409	'	'	'	'	'	'	'	'
Net loss	-4,406	'	'	-4,406	'	'	'	'	'	'
Balance at at Jul. 31, 2013	189,553	302,101	-11	-112,542	'	'	0	'	5	'
Balance at (in shares) at Jul. 31, 2013	'	'	'	'	'	'	0	'	51,670,000	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'	'	'
Stock-based compensation	40,934	40,934	'	'	'	'	'	'	'	'
Issuance of common stock upon exercise of stock options	13,835	13,834	'	'	'	'	'	'	1	'
Issuance of common stock upon exercise of stock options (in shares)	'	'	'	'	'	'	'	'	2,052,000	'
Issuance of common stock in connection with the ESPP	8,161	8,161	'	'	'	'	'	'	'	'
Issuance of common stock in connection with the ESPP (in shares)	'	'	'	'	'	'	'	'	644,000	'
Issuance of common stock upon vesting of restricted stock units	0	0	'	'	'	'	'	'	'	'
Restricted stock units issued in connection with business acquisition	573	573	'	'	'	'	'	'	'	'
Restricted stock units issued in connection with business acquisition (in shares)	'	'	'	'	'	'	'	'	18,000	'
Issuance of common stock upon vesting of restricted stock units (in shares)	'	'	'	'	'	'	'	'	681,000	'
Vesting of early exercised common stock options	60	60	'	'	'	'	'	'	'	'
Net unrealized holding loss on short-term investments	-73	'	-73	'	'	'	'	'	'	'
Excess tax benefit from employee stock plans	170	170	'	'	'	'	'	'	'	'
Net loss	-23,917	'	'	'	'	'	'	'	'	'
Balance at at Jul. 31, 2014	$229,296	$365,833	($84)	($136,459)	'	'	$0	'	$6	'
Balance at (in shares) at Jul. 31, 2014	'	'	'	'	'	'	0	'	55,065,000	'

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	($23,917)	($4,406)	($8,210)
Adjustments to reconcile net loss to net cash provided by operating activities:	'	'	'
Stock-based compensation	40,971	22,064	10,652
Depreciation and amortization	8,735	6,670	5,700
Amortization of investment premium	547	387	0
Excess tax benefits from employee stock plans	-170	-409	-47
Change in fair value of convertible preferred stock warrant liability	0	0	391
Other	280	-43	-14
Changes in operating assets and liabilities:	'	'	'
Accounts receivable, net	2,308	-11,909	-6,136
Inventory	-1,867	-1,918	-1,054
Prepaid expenses, other current assets and other assets	-1,500	-2,170	550
Accounts payable and accrued liabilities	3,061	1,762	1,854
Accrued compensation	725	2,177	3,310
Deferred revenue, net	17,927	21,505	14,668
Other liabilities	-792	5,904	-280
Net cash provided by operating activities	46,308	39,614	21,384
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'	'
Purchases of short-term investments	-186,322	-174,478	0
Proceeds from maturities of short-term investments	86,730	34,572	0
Proceeds from sales of short-term investments	47,180	0	0
Purchases of property and equipment	-6,352	-16,515	-3,962
Business acquisition	-1,000	0	0
Change in restricted cash	0	625	-3,400
Net cash used in investing activities	-59,764	-155,796	-7,362
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'
Proceeds from initial public offering, net of offering costs	0	0	98,425
Proceeds from issuance of common stock under the employee stock plans	21,993	29,223	1,912
Excess tax benefits from employee stock plans	170	409	47
Payment of remaining unpaid initial public offering costs	0	-235	0
Net cash provided by financing activities	22,163	29,397	100,384
NET INCREASE IN CASH AND CASH EQUIVALENTS	8,707	-86,785	114,406
CASH AND CASH EQUIVALENTS--Beginning of year	69,828	156,613	42,207
CASH AND CASH EQUIVALENTS--End of year	78,535	69,828	156,613
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:	'	'	'
Restricted stock units released in connection with business acquisition	573	0	0
Cash paid for income taxes, net	489	1,120	120
Purchases of property and equipment not yet paid	484	164	287
Change in liability due to vesting of early exercised stock options, net	60	224	221
Conversion of convertible preferred stock to common stock	0	0	107,506
Initial public offering costs not yet paid	$0	$0	$235

Description_of_the_Business_an

Description of the Business and Summary of Significant Accounting Policies	12 Months Ended
	Jul. 31, 2014
Accounting Policies [Abstract]	'
Description of the Business and Summary of Significant Accounting Policies	'
	DESCRIPTION OF THE BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Business
	Infoblox Inc. (together with its subsidiaries, “we” or “our”) was originally incorporated in the State of Illinois in February 1999 and was reincorporated in the State of Delaware in May 2003. We are headquartered in Santa Clara, California and have subsidiaries and representative offices located throughout the world. We provide a broad family of enterprise and service provider-class solutions to automate management of the critical network infrastructure services needed for secure, scalable and fault-tolerant connections between applications, devices and users.
	Initial Public Offering
	On April 25, 2012, we completed our initial public offering of our common stock (“IPO”). Our common stock commenced trading on the New York Stock Exchange under the symbol “BLOX” on April 20, 2012. On the IPO, we sold 6.9 million shares of common stock (inclusive of 1.1 million shares of common stock from the full exercise of the overallotment option of shares granted to the underwriters) and 1.8 million shares of common stock were sold by the selling stockholders. The public offering price of the shares sold in the offering was $16.00 per share. The aggregate offering price for shares sold by us in the offering was approximately $109.9 million. We did not receive any proceeds from the sales of shares by the selling stockholders. The net proceeds from the offering were $98.2 million after deducting underwriting discounts and commissions of approximately $7.7 million and offering expenses of approximately $4.0 million. Concurrent with the closing of the IPO, all shares of our convertible preferred stock automatically converted into 26.8 million shares of common stock and all shares of convertible preferred stock warrants converted to common stock warrants, of which an insignificant amount remained unexercised as of July 31, 2014.
	Secondary Offering
	On October 11, 2012, we closed a secondary offering, in which certain of our stockholders offered 5.0 million shares of common stock at a price to the public of $20.00 per share. The aggregate offering price for shares sold in the offering was $96.0 million, net of underwriting discounts and commissions. The underwriters did not exercise their option to purchase 0.8 million additional shares of common stock from our selling stockholders. We did not receive any proceeds from the sale of shares in this offering. In connection with this offering, we incurred approximately $0.8 million expenses, which were included in general and administrative expenses in the consolidated statement of operations for the year ended July 31, 2013.
	Basis of Presentation
	The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and include all adjustments necessary for the fair presentation of our consolidated financial position, results of operations and cash flows for the periods presented. The accompanying consolidated financial statements include the accounts of Infoblox Inc. and our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
	Use of Estimates
	The preparation of the accompanying consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Those management estimates and assumptions affect revenue recognition, determination of fair value of stock-based awards, valuation of goodwill and intangible assets acquired, impairment of goodwill and other intangible assets, amortization of intangible assets, contingencies and litigation, accounting for income taxes, including the valuation reserve on deferred tax assets and uncertain tax positions, allowances for doubtful accounts, warranty reserve and sales returns and valuation of inventory. We evaluate our estimates and assumptions on an ongoing basis using historical experience and other factors and adjust those estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the consolidated financial statements.
	Concentration of Supply Risk with Contract Manufacturer
	We outsource the substantial majority of our manufacturing, repair and supply chain management operations to one independent contract manufacturer. The inability of the manufacturer to fulfill our supply requirements could have a material and adverse effect on our business and consolidated financial statements.
	In addition, our independent contract manufacturer procures components and manufactures our products based on our demand forecasts. These forecasts are based on our estimates of future demand for our products, which are in turn based on historical trends and an analysis from our sales and marketing organizations, adjusted for overall market conditions. We may be subject to the requirement to purchase inventory or to pay additional fees to the contract manufacturer if there is a significant difference in scheduled shipments or if the contract manufacturer holds inventory longer than a specified period. In 2012, we recorded a charge of $0.4 million for non-cancelable purchase commitments to our contract manufacturer for inventory which we deemed as excess and obsolete. This amount was recognized in products and licenses cost of revenue in the consolidated statement of operations for the year ended July 31, 2012. No significant charge was recorded in 2014 or 2013.
	Concentrations of Credit Risk
	Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents, restricted cash and accounts receivable. Our cash, cash equivalents and restricted cash are invested in high-credit quality financial instruments held mainly in two US banks. Such deposits may be in excess of insured limits provided on such deposits.
	We mitigate credit risk in respect to accounts receivable by performing ongoing credit evaluations of our customers and maintaining a reserve for potential credit losses. In addition, we generally require our customers to prepay for maintenance and support services to mitigate the risk of uncollectible accounts receivable.
	Reverse Stock Split
	On April 3, 2012, our board of directors approved a 1-for-3 reverse split of our common stock, which became effective on April 10, 2012. Upon the effectiveness of the reverse stock split, (i) every three shares of outstanding common stock were decreased to one share of common stock, (ii) the number of shares of common stock into which each outstanding option to purchase common stock is exercisable have been proportionally decreased on a 1-for-3 basis, (iii) the exercise price of each outstanding option to purchase common stock have been proportionately increased, and (iv) the conversion ratio for each share of preferred stock outstanding have been proportionately reduced. All of the share numbers, share prices, and exercise prices have been adjusted within these financial statements, on a retroactive basis, to reflect this 1-for-3 reverse stock split.
	Cash and Cash Equivalents
	All highly liquid investments purchased with an original maturity of three months or less are classified as cash and cash equivalents. Cash and cash equivalents consist of cash on hand, demand deposits with banks, highly liquid investments in money market funds, U.S. Treasury securities and certificates of deposit which are readily convertible into cash.
	Restricted Cash
	Under our facility lease arrangements, we are required to maintain letters of credit from a U.S. bank as security for performance under these agreements. The letters of credit are generally invested in U.S. Treasury securities or money market funds or interest-bearing accounts in amounts equal to the letters of credit, which are classified as restricted cash on the consolidated balance sheets. Restricted cash, which is shown under non-current assets in the consolidated balance sheets, amounted to $3.5 million as of July 31, 2014 and 2013.
	Short-term Investments
	Investments with original maturities at purchase of greater than three months are classified as short-term or long-term investments. Management determines the appropriate classification of securities at the time of purchase and re-evaluates such classification as of each balance sheet date.
	Our investments in publicly-traded debt securities are classified as available-for-sale. Available-for-sale investments are initially recorded at cost and periodically adjusted to fair value in the consolidated balance sheets. Unrealized gains and losses on these investments are reported as a separate component of accumulated other comprehensive income (loss). Realized gains and losses are determined based on the specific identification method and are reported in the consolidated statements of operations. The investments are adjusted for amortization of premiums and discounts to maturity and such amortization is included in other expense, net.
	We recognize an impairment charge for available-for-sale investments when a decline in the fair value of our investments below the cost basis is determined to be other than temporary. We consider various factors in determining whether to recognize an impairment charge, including the length of time the investment has been in a loss position, the extent to which the fair value has been less than the cost basis, the investment's financial condition and near-term prospects, and our intent to sell, or whether it is more likely than not we will be required to sell, the investment before recovery of the investment's amortized cost basis. If we determine that the decline in an investment's fair value is other than temporary, the difference is recognized as an impairment loss in our consolidated statements of operations. During the year ended July 31, 2014, we did not consider any of our investments to be other-than-temporarily impaired.
	Fair Value
	Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining fair value, we consider the principal or most advantageous market in which we transact, and consider assumptions that market participants would use when pricing the asset or liability. We apply the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:
	Level I - Quoted prices in active markets for identical assets or liabilities.
	Level II - 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. These inputs are valued using market based approaches.
	Level III - Inputs are unobservable inputs based on management assumptions. These inputs, if any, are valued using internal financial models.
	Inventory
	Inventories are stated at the lower of standard cost, which approximates actual cost (first-in, first-out), or market value (estimated net realizable value). The valuation of inventories at the lower of cost or market value requires the use of estimates regarding the amount of inventory that will be sold and the prices at which current inventory will be sold. These estimates are dependent on our assessment of current and expected orders from our customers. If actual market conditions are less favorable than those projected by management, inventory write-downs may be required. Our finished goods mainly consist of appliances that are used for the replacement of failed units under maintenance and support agreements and finished goods needed for our expanded depot requirements. We write down refurbished inventory based on the age of the units and number of hardware failures. During the years ended July 31, 2014, 2013 and 2012, inventory write-downs were $1.3 million, $1.1 million and $0.6 million.
	Property and Equipment, Net
	Property and equipment, including leasehold improvements, are stated at cost, less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets, which are two to three years. Leasehold improvements are amortized on a straight-line basis over the shorter of the estimated useful lives of the assets or the remaining lease term. Upon the retirement or disposition of property and equipment, the related costs and accumulated depreciation are removed from, and the resulting gain or loss is included in, the consolidated statements of operations. Repair and maintenance costs that do not extend the life or improve an asset are charged to expense as incurred.
	Goodwill, Intangible Assets and Other Long-Lived Assets
	Goodwill represents the future economic benefits arising from other assets acquired in a business combination or an acquisition that are not individually identified and separately recorded. The excess of the purchase price over the estimated fair value of net assets of businesses acquired in a business combination is recognized as goodwill.
	Intangible assets consist of identifiable intangible assets, including developed technology, customer relationships, non-compete agreements, trademarks and patents, resulting from our acquisitions. Intangible assets are recorded at fair value, net of accumulated amortization. Intangible assets are amortized on a straight-line basis over their estimated useful lives. Amortization expense is included as a component of cost of products and licenses revenue and sales and marketing expense in the accompanying consolidated statements of operations. Amounts included in sales and marketing expense relate to amortization of intangible asset attributed to customer relationships.
	Goodwill and other intangible assets acquired in a business combination and determined to have an indefinite useful life are not amortized, but instead tested for impairment at least annually during the fourth quarter. Such goodwill and other intangible assets may also be tested for impairment between annual tests in the presence of impairment indicators such as, but not limited to: (a) a significant adverse change in legal factors or in the business climate; (b) a substantial decline in our market capitalization, (c) an adverse action or assessment by a regulator; (d) unanticipated competition; (e) loss of key personnel; (f) a more likely-than-not expectation of sale or disposal of a reporting unit or a significant portion thereof; (g) a realignment of our resources or restructuring of our existing businesses in response to changes to industry and market conditions; (h) testing for recoverability of a significant asset group within a reporting unit; or (i) higher discount rate used in the impairment analysis as impacted by an increase in interest rates.
	We evaluate goodwill on an annual basis as of May 1st or more frequently if we believe impairment indicators exist. Goodwill is tested for impairment by comparing the reporting unit's carrying value, including goodwill, to the fair value of the reporting unit. We operate under one reporting unit and for our annual goodwill impairment analysis, we determine the fair value of our reporting unit based on the Company's enterprise value.
	Long-lived assets, such as property and equipment and intangible assets subject to depreciation and amortization, are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. Among the factors and circumstances we considered in determining recoverability are: (i) a significant decrease in the market price of a long-lived asset; (ii) a significant adverse change in the extent or manner in which a long-lived asset is being used or in its physical condition; (iii) a significant adverse change in legal factors or in the business climate that could affect the value of a long-lived asset, including an adverse action or assessment by a regulator; (iv) an accumulation of costs significantly in excess of the amount originally expected for the acquisition and (v) current-period operating or cash flow loss combined with a history of operating or cash flow losses or a projection or forecast that demonstrates continuing losses associated with the use of a long-lived asset. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset.
	There have been no indicators of impairment of goodwill, intangible assets and other long-lived assets, and we did not record any impairment losses during the years ended July 31, 2014, 2013 and 2012.
	Revenue Recognition
	We generate revenue from the sales or licensing of hardware and software products, support and maintenance, and other services through a direct sales force and indirect relationships with our partners. Revenue is recognized when all of the following criteria are met:
	Persuasive evidence of an arrangement exists. Evidence of an arrangement generally consists of a purchase order issued pursuant to the terms and conditions of a distributor or value-added reseller agreement or, in limited cases, an end-user agreement.
	Delivery or performance has occurred. We use shipping and related documents, distributor sell-through reports, or written evidence of customer acceptance, when applicable, to verify delivery or performance. We do not recognize product revenue until transfer of title and risk of loss, which generally is upon shipment to value-added resellers or end-users.
	The sales price is fixed or determinable. We assess whether the sales price is fixed or determinable based on payment terms and whether the sales price is subject to refund or adjustment.
	Collection is probable. We assess probability of collection on a customer-by-customer basis. We subject our customers to a credit review process that evaluates their financial condition and ability to pay for our products and services. If we conclude that collection is not probable, we do not recognize revenue until cash is received.
	We recognize product revenue at the time of shipment provided that all other revenue recognition criteria have been met. Services revenue includes maintenance and support, training and consulting, and subscription services revenue. Maintenance and support revenue includes arrangements for software maintenance and technical support for our products and licenses. Maintenance is offered under renewable, fee-based contracts, which include 24-hour technical support, hardware repair and replacement parts, bug fixes, patches and unspecified upgrades on a when-and-if-available basis. Revenue from customer maintenance and support contracts and subscription services is deferred and recognized ratably over the contractual period, generally one to three years. Revenue from consulting and training is recognized as the services are completed.
	We operate a multiple tier channel distribution model that includes distributors, value-added resellers and direct sales to end-users. For sales to value-added resellers and end-users, we recognize product revenue upon transfer of title and risk of loss, which is generally upon shipment. It is our practice to identify an end-user prior to shipment to a value-added reseller. For the end-users and value-added resellers, we generally have no significant contractual obligations for future performance, such as rights of return or pricing credits. However, we may on occasion enter into arrangements with end-users or value-added resellers that include some form of rights of return, rebates or price protection. Also, we may occasionally accept returns by end-users or value-added resellers to address customer satisfaction issues or solution fit issues even though there is no contractual provision for such returns. We record reductions to revenue for estimated product returns and pricing adjustments in the same period that the related revenue is recorded. The amount of these reductions is based on historical sales returns and price adjustments, specific provisions for returns, price protection or rebates in agreements, and other factors known at the time. Should actual product returns or pricing adjustments differ from estimates, additional reductions to revenue may be required. Distributor revenue is subject to agreements that may allow pricing credits, price protection, rebates and rights of return or involve international jurisdictions where the risk of returns or credits is considered to be high even though distributors do not have these contractual rights. As a consequence, the Company has determined that the sales price is not fixed or determinable at the time of shipment to a distributor and thus revenue and related costs of sales for these shipments are deferred until information is received from the distributor indicating that the product has been sold through to an end customer or value added reseller.
	Multiple Element Arrangements
	We enter into multiple element revenue arrangements in which a customer may purchase a combination of hardware, software, software upgrades, hardware and software maintenance and support, training and consulting, and subscription services. We account for multiple agreements with a single customer as one arrangement if the contractual terms and/or substance of those agreements indicate that they may be so closely related that they are, in effect, parts of a single arrangement.
	Most of our products are hardware appliances containing software components that operate together to provide the essential functionality of the product. Therefore, the software sold with our hardware appliances are considered non-software deliverables and are not accounted for under the industry-specific software revenue recognition guidance.
	Our products and licenses revenue also includes stand-alone software products. Stand-alone software may operate on our hardware appliances, but is not considered essential to the functionality of the hardware and continues to be subject to the industry-specific software revenue recognition guidance. The industry-specific software revenue recognition guidance includes the use of the residual method under which the amount of revenue allocated to delivered elements equals the total arrangement consideration less the aggregate fair value of any undelivered elements. If VSOE of fair value of one or more undelivered items does not exist, revenue from the entire arrangement is deferred and recognized at the earlier of: (i) delivery of those elements or (ii) when fair value can be established unless support and maintenance is the only undelivered element, in which case, the entire arrangement fee is recognized ratably over the contractual service period.
	We provide unspecified software upgrades for most of our products, on a when-and-if available basis, through maintenance and support contracts. To the extent that the software being supported does not function together with the hardware to deliver the hardware’s essential functionality, these support arrangements would continue to be subject to the industry-specific software revenue recognition guidance.
	We allocate the arrangement fee to each element based upon the relative selling price of that element and, if software and software-related (e.g., maintenance for the software element) elements are also included in the arrangement, we allocate the arrangement fee to each of those software and software-related elements as a group based on the relative selling price for those elements. After such allocations are made, the amount of the arrangement fee allocated to the software and software-related elements is accounted for using the residual method. When applying the relative selling price method, we determine the selling price for each element using vendor-specific objective evidence, or VSOE, of selling price, if it exists, or if not, third-party evidence, or TPE, of selling price, if it exists. If neither VSOE nor TPE of selling price exist for an element, we use our best estimate of selling price, or BESP, for that element. The revenue allocated to each element is then recognized when the basic revenue recognition criteria are met for that element. We limit the amount of revenue recognized for delivered elements to an amount that is not contingent upon future delivery of additional products or services or meeting of any specified performance conditions.
	Whenever possible, we determine VSOE for each element based on historical stand-alone sales to third parties. For maintenance and support, training and consulting, and subscription services, we determine the VSOE of fair value based on our history of stand-alone sales demonstrating that a substantial majority of transactions fall within a narrow range for each service offering.
	We historically have not been able to determine TPE for our products, maintenance and support, training or consulting services. TPE is determined based on competitor prices for similar elements when sold separately. Generally, our offerings contain a significant level of differentiation such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, our go-to-market strategy differs from that of our peers and we are unable to reliably determine what similar competitor products' selling prices are on a stand-alone basis.
	When we are unable to establish the selling price of an element using VSOE or TPE, we use BESP in our allocation of consideration to various elements under the arrangement. The objective of BESP is to determine the price at which we would transact a sale if the product or service were sold on a stand-alone basis. The BESP is established based on internal and external factors, including pricing practices such as discounting, cost of products, the geographies in which we offer our products and services, and customer classes and distribution channels (e.g. distributor, value-added reseller and direct end-user). The determination of BESP is made through consultation with and approval by our management, taking into consideration our pricing model and go-to-market strategy.
	For our non-software deliverables, we generally determine relative selling price based on BESP. However, for our maintenance and support, training and consulting, and subscription services, we generally use VSOE to determine relative selling price. When we are unable to establish selling price using VSOE for our maintenance and support, training and consulting, and subscription services, we use BESP in our allocation of arrangement consideration.
	We regularly review VSOE and BESP data provided by actual transactions to update these estimates and the relative selling prices allocated to each element.
	Deferred Revenue, Net
Deferred revenue, net represents amounts invoiced to customers, less related cost of revenue, for which the related revenue has not been recognized because one or more of the revenue recognition criteria have not been met. The current portion of deferred revenue represents the amounts that are expected to be recognized as revenue within one year of the consolidated balance sheet date.
Accounts Receivable and Allowance for Doubtful Accounts
Accounts receivable are recorded at invoiced amounts, net of allowances for doubtful accounts if applicable, and do not bear interest.
We evaluate the collectability of our accounts receivable based on known collection risks and historical experience. In circumstances where we are aware of a specific customer's inability to meet its financial obligations to us (e.g., bankruptcy filings or substantial downgrading of credit ratings), we record a specific reserve for bad debts against amounts due to reduce the net recognized receivable to the amount we reasonably believe will be collected. For all other customers, we record reserves for bad debts based on the length of time the receivables are past due and our historical experience of collections and write-offs. If circumstances change, such as higher-than-expected defaults or an unexpected material adverse change in a major customer's ability to meet its financial obligations, our estimate of the recoverability of the amounts due could be reduced by a material amount.
Concentration of Revenue and Accounts Receivable
Significant customers are those which represent more than 10% of our total net revenue or gross accounts receivable balance at each respective balance sheet date. Exclusive Networks, a distributor, accounted for 10.5% and 11.5% of our total net revenue for the years ended July 31, 2014 and 2013. No single end customer, distributor or channel partner accounted for more than 10% of our net revenue in 2012. As of July 31, 2014 and 2013, Exclusive Networks accounted 12.8% and11.2% of our total gross accounts receivable.
Shipping and Handling
Shipping charges billed to customers are included in revenue and the related shipping costs are included in cost of revenue.
Research and Development Costs
Software development costs incurred in the research and development of new products and enhancements to existing products are charged to expense as incurred. Software development costs are capitalized after technological feasibility has been established. The period between achievement of technological feasibility, which we define as the establishment of a working model, and the general availability of such software to customers has been short, resulting in software development costs qualifying for capitalization being insignificant. Accordingly, we did not capitalize any software development costs during the years ended July 31, 2014, 2013 and 2012.
Stock-Based Compensation
We recognize share-based compensation expense for all share-based payment awards including employee stock options, RSUs, and purchases under our ESPP based on each award's fair value on the grant date. We utilize the BSM option pricing model in order to determine the fair value of stock options and ESPP. The BSM option pricing model requires various highly subjective assumptions including volatility, expected award life, and risk-free interest rate. Since we only have a short trading history of our common stock (approximately 30 months since our IPO), we use a blended volatility to estimate expected volatility. The blended volatility includes a weighting of our historical volatility from the date of our IPO to the respective grant date and the average historical stock volatilities of several unrelated public companies within our industry that we consider to be comparable to our business over a period equivalent to the estimated life of our stock options. The expected life of an award is based on historical experience, the terms and conditions of the stock awards granted to employees, and the potential effect from options that have not been exercised. The fair value of the RSUs is determined using the closing price of our common stock on the date of the grant. Compensation is recognized on a straight-line basis over the requisite service period of each grant adjusted for estimated forfeitures. In addition, we are required to estimate the expected forfeiture rate and only recognize expense for those shares expected to vest. We estimate the forfeiture rate based on historical experience and our expectations regarding future pre-vesting termination behavior of employees.
Warranty Costs
Our appliance hardware generally includes a one-year warranty, and our software generally carries a warranty of ninety days. Costs related to hardware replacement provided to customers under maintenance support agreements are included as services cost of revenue and recognized as these services are provided.
Advertising Costs
Advertising costs are charged to sales and marketing expenses as incurred in the consolidated statements of operations. Advertising expense during the years ended July 31, 2014, 2013 and 2012 was $1.3 million, $1.0 million and $1.1 million.
Foreign Currency
The functional currency of our foreign subsidiaries is the U.S. dollar. Transactions denominated in currencies other than the functional currency are remeasured at the average exchange rate in effect during the period. At the end of each reporting period, our subsidiaries' monetary assets and liabilities are remeasured to the functional currency using exchange rates in effect at the end of the reporting period. Non-monetary assets and liabilities are remeasured at historical exchange rates. Gains and losses related to remeasurement are recorded in other expense, net in the consolidated statements of operations. Foreign currency exchange losses included in other expense, net during the years ended July 31, 2014, 2013 and 2012 were $0.5 million, $0.8 million and $0.6 million.
Income Taxes
We account for income taxes under an asset and liability approach for deferred income taxes, which requires recognition of deferred income tax assets and liabilities for the expected future tax consequences of events that have been recognized in our consolidated financial statements, but have not been reflected in our taxable income. Estimates and judgments occur in the calculation of certain tax liabilities and in the determination of the recoverability of certain deferred income tax assets, which arise from temporary differences and carryforwards. Deferred income tax assets and liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in which those tax assets are expected to be realized or settled. We regularly assess the likelihood that our deferred income tax assets will be realized based on the realization guidance available. To the extent that we believe any amounts are not more-likely-than-not to be realized, we record a valuation allowance to reduce the deferred income tax assets. We regularly assess the need for the valuation allowance on our deferred tax assets, and to the extent that we determine that an adjustment is needed, such adjustment will be recorded in the period that the determination is made.
We regularly review our tax positions and benefits to be realized. We recognize tax liabilities based upon our estimate of whether, and the extent to which, additional taxes will be due when such estimates are more-likely-than-not to be sustained. An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained. We recognize interest and penalties related to income tax matters as income tax expense. For the years ended July 31, 2014, 2013 and 2012, we did not incur any interest or penalties associated with unrecognized tax benefits.
Segment Information
Operating segments are components of an enterprise for which separate financial information is available and is evaluated regularly by our chief operating decision maker in deciding how to allocate resources and assessing performance. Our chief operating decision maker is our Chief Executive Officer.
Our Chief Executive Officer reviews financial information presented on a consolidated basis, for purposes of allocating resources and evaluating financial performance. We have one business activity and there are no segment managers who are held accountable for operations, operating results beyond revenue goals or gross margins, or plans for levels or components below the consolidated unit level. Accordingly, we have a single reporting segment.
Recently Issued Accounting Pronouncements
In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-11, Income Taxes (Topic 740), Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (“ASU 2013-11”). ASU 2013-11 provides guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, similar tax loss, or tax credit carryforward exists. This new standard requires the netting of unrecognized tax benefits (“UTBs”) against a deferred tax asset for a loss or other carryforward that would apply in settlement of the uncertain tax positions. UTBs will be netted against all available same-jurisdiction loss or other tax carryforwards that would be utilized, rather than only against carryforwards that are created by the UTBs. We adopted ASU 2013-11 during the first quarter of fiscal 2014 and the adoption did not have any impact on our consolidated financial position or results of operations.
In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09), which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP. The standard is effective for us beginning the first quarter of fiscal 2018, using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements and have not yet determined the method by which we will adopt the standard in fiscal 2018.

Net_Income_Loss_Per_Share

Net Income (Loss) Per Share	12 Months Ended
	Jul. 31, 2014
Earnings Per Share [Abstract]	'
Net Income (Loss) Per Share	'
	NET INCOME (LOSS) PER SHARE
	We compute basic net income (loss) per share using the weighted average number of common shares outstanding during the period. We compute diluted net income per share using the weighted average number of common shares and dilutive potential common shares outstanding during the period. Dilutive potential common shares include shares issuable upon the exercise of stock options or warrants, upon the conversion of convertible preferred stock and upon the vesting of restricted stock units, or RSUs, under the treasury stock method.
	In loss periods, basic net loss per share and diluted net loss per share are the same since the effect of potential common shares is anti-dilutive and therefore excluded.
	The following weighted-average shares of common stock equivalents were excluded from the computation of diluted net loss per share for the years presented because including them would have been antidilutive:
		Year Ended July 31,
		2014	2013	2012
		(In thousands)
	Stock options to purchase common stock	3,629	6,123	8,049
	Restricted stock units	1,745	225	3
	Employee stock purchase plan	380	110	616
	Convertible preferred stock	—	—	19,581
	Common stock warrants	—	—	246
	Convertible preferred stock warrants	—	—	41
	Prior to our IPO, holders of convertible preferred stock were entitled to receive noncumulative dividends at the annual rates per annum payable prior and in preference to any dividends on shares of our common stock. Preferred stockholders did not have a contractual obligation to share in the losses of our Company. Due to the net loss we reported in 2012, the convertible preferred stock did not have any impact in our net loss per share calculation in that year.

Cash_Equivalents_and_Shortterm

Cash Equivalents and Short-term Investments, Restricted Cash and Fair Value Measurements	12 Months Ended
	Jul. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'
Cash Equivalents and Short-term Investments, Restricted Cash and Fair Value Measurements	'
	CASH EQUIVALENTS, SHORT-TERM INVESTMENTS, RESTRICTED CASH AND FAIR VALUE MEASUREMENTS
	Cash Equivalents, Short-term Investments and Restricted Cash
	The following table summarizes our cash equivalents, short-term investments and restricted cash as of July 31, 2014:
		Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
		(In thousands)
	Cash equivalents:
	Money market funds	$	7,550	$	—	$	—		$	7,550
	U.S. Treasury securities	2,000		—		—			2,000
	Total cash equivalents	9,550		$	—	—			9,550
	Short-term investments:
	U.S. Treasury securities	136,729		37		(65		)	136,701
	U.S. government agency securities	37,433		3		(53		)	37,383
	FDIC-backed certificates of deposit	17,240		4		(12		)	17,232
	Total short-term investments	191,402		44		(130		)	191,316
	Restricted cash:
	U.S. Treasury securities	3,413		2		—			3,415
	Total cash equivalents, short-term investments and restricted cash	$	204,365	$	46	$	(130	)	$	204,281
	The following table presents the maturities of our short-term investments which are classified as available-for-sale securities as of July 31, 2014:
		Amortized Cost		Estimated Fair Value
		(In thousands)
	Due within one year	$	97,230	$	97,246
	Due after one year through two years	94,172		94,070
	Total	$	191,402	$	191,316
	We classify our available-for-sale investments as short-term investments in our consolidated balance sheet based on management's intention to have the funds available for use in operations or strategic investments rather than actual maturity dates.
	The following table summarizes our cash equivalents, short-term investments and restricted cash as of July 31, 2013:
		Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
		(In thousands)
	Cash equivalents:
	Money market funds	$	11,133	$	—	$	—		$	11,133
	Short-term investments:
	U.S. Treasury securities	99,754		12		(28		)	99,738
	U.S. government agency securities	29,525		13		(4		)	29,534
	FDIC-backed certificates of deposit	10,240		6		(10		)	10,236
	Total short-term investments	139,519		31		(42		)	139,508
	Restricted cash:
	U.S. Treasury securities	3,407		—		—			3,407
	Total cash equivalents, short-term investments and restricted cash	$	154,059	$	31	$	(42	)	$	154,048
	Fair Value Measurements
	The following table sets forth the fair value of our financial assets by level within the fair value hierarchy:
		Fair Value Measurements at July 31, 2014 Using:
		Quoted Prices in Active Markets For Identical Assets		Significant Other Observable Remaining Inputs		Significant Other Unobservable Remaining Inputs
		(Level I)		(Level II)		(Level III)			Total
		(In thousands)
	Financial Assets
	Reported as cash equivalents:
	Money market funds	$	7,550	$	—	$	—		$	7,550
	U.S. Treasury securities	2,000		—		—			2,000
	Total cash equivalents	9,550		—		—			9,550
	Reported as short-term investments:
	U.S. Treasury securities	136,701		—		—			136,701
	U.S. government agency securities	—		37,383		—			37,383
	FDIC-backed certificates of deposit	—		17,232		—			17,232
	Total short-term investments	136,701		54,615		—			191,316
	Reported as restricted cash:
	U.S. Treasury securities	3,415		—		—			3,415
	Total financial assets	$	149,666	$	54,615	$	—		$	204,281
		Fair Value Measurements at July 31, 2013 Using:
		Quoted Prices in Active Markets For Identical Assets		Significant Other Observable Remaining Inputs		Significant Other Unobservable Remaining Inputs
		(Level I)		(Level II)		(Level III)			Total
		(In thousands)
	Financial Assets
	Reported as cash equivalents:
	Money market funds	$	11,133	$	—	$	—		$	11,133
Reported as short-term investments:
U.S. Treasury securities	99,738		—		—			99,738
U.S. government agency securities	—		29,534		—			29,534
FDIC-backed certificates of deposit	—		10,236		—			10,236
Total short-term investments	99,738		39,770		—			139,508
Reported as restricted cash:
U.S. Treasury securities	3,407		—		—			3,407
Total financial assets	$	114,278	$	39,770	$	—		$	154,048
We value our Level I assets, consisting primarily of money market funds and U.S. Treasury securities, using quoted prices in active markets for identical instruments. Financial assets whose fair values we measure on a recurring basis using Level II inputs consist of U.S. government agency securities and Federal Deposit Insurance Corporation, or FDIC-backed certificates of deposit. We measure the fair values of these assets with the help of a pricing service that either provides quoted market prices in active markets for identical or similar securities or uses observable inputs for their pricing without applying significant adjustments because the inputs used in the valuation model, such as interest rates and volatility, can be corroborated by readily observable market data for substantially the full term of the financial assets.
There were no transfers between Level I, Level II and Level III fair value hierarchies during the years ended July 31, 2014 and 2013.

Balance_Sheet_Components

Balance Sheet Components	12 Months Ended
	Jul. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Balance Sheet Components	'
	BALANCE SHEET COMPONENTS
	Allowance for Doubtful Accounts and Sales Returns Reserve
	The allowances for doubtful accounts and sales returns consist of the following activity:
		Balance at Beginning of Year			Charged to (Reversed From) Cost and Expenses			Deductions			Balance at End of Year
		(In thousands)
	Year Ended July 31, 2012
	Allowance for doubtful accounts	$	266		$	167		$	(76	)	$	357
	Sales returns reserve	273			118			(204		)	187
	Total allowance for doubtful accounts and sales returns reserve	$	539		$	285		$	(280	)	$	544
	Year Ended July 31, 2013
	Allowance for doubtful accounts	$	357		$	177		$	(178	)	$	356
	Sales returns reserve	187			197			(159		)	225
	Total allowance for doubtful accounts and sales returns reserve	$	544		$	374		$	(337	)	$	581
	Year Ended July 31, 2014
	Allowance for doubtful accounts	$	356		$	72		$	(89	)	$	339
	Sales returns reserve	225			(73		)	(27		)	125
	Total allowance for doubtful accounts and sales returns reserve	$	581		$	(1	)	$	(116	)	$	464
	Inventory
	Inventory consists of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Raw materials	$	474		$	412
	Finished goods	5,871			4,066
	Total inventory	$	6,345		$	4,478
	Prepaid Expenses and Other Current Assets
	Prepaid expenses and other current assets consist of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Prepaid expenses	$	6,002		$	4,626
	Other current assets	1,219			1,397
	Total prepaid expenses and other current assets	$	7,221		$	6,023
	Property and Equipment, Net
	Property and equipment, net consists of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Computer equipment and software	$	19,660		$	14,394
	Furniture and fixtures	4,588			4,354
	Leasehold improvements	10,604			9,948
	Total property and equipment, gross	34,852			28,696
	Less accumulated depreciation and amortization	(16,067		)	(10,326		)
	Total property and equipment, net	$	18,785		$	18,370
	Depreciation and amortization expense was $6.3 million, $4.3 million and $2.9 million in 2014, 2013 and 2012.
	Accounts Payable and Accrued Liabilities
	Accounts payable and accrued liabilities consist of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Accounts payable	$	8,064		$	6,295
	Accrued travel expenses	1,372			954
	Other	6,212			5,138
	Total other current liabilities	$	15,648		$	12,387
	Deferred Revenue, Net
	Deferred revenue, net consists of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Deferred revenue:
	Products and licenses	$	5,120		$	7,791
	Services	112,642			91,453
	Total deferred revenue	117,762			99,244
Deferred cost of revenue:
Products and licenses	449			871
Services	1,200			201
Total deferred cost of revenue	1,649			1,072
Total deferred revenue, net	116,113			98,172
Less current portion	81,964			68,479
Non-current portion	$	34,149		$	29,693

Other_Expense_Net

Other Expense, Net	12 Months Ended
	Jul. 31, 2014
Other Income and Expenses [Abstract]	'
Other Expense, Net	'
	NSE, NET
	Other expense, net is comprised of the following:
		Year Ended July 31,
		2013			2012			2011
		(In thousands)
	Interest income and other, net	$	435		$	195		$	58
	Foreign currency exchange losses	(453		)	(813		)	(613		)
	Change in fair value of convertible preferred stock warrant liability	—			—			(391		)
	Total other expense, net	$	(18	)	$	(618	)	$	(946	)

Acquisitions

Acquisitions	12 Months Ended
	Jul. 31, 2014
Business Combinations [Abstract]	'
Acquisitions	'
	ACQUISITIONS
	On December 20, 2013, we closed the acquisition of substantially all of the assets of Internet Associates LLC, or IA, a small privately held software company that specialized in the automation of IP address management and IPv6. We did not acquire any tangible assets nor did we assume any material liabilities as part of this acquisition. We expect this acquisition will help us build on our core business.
	We accounted for the IA acquisition using the acquisition method of accounting for business combinations. In addition to cash consideration of $1.0 million, we made employment offers to IA’s four former key employees in which they were granted an aggregate of 70,000 of our RSUs. Twenty-five percent of these RSUs, or 17,499, became fully vested upon closing of the transaction, and the remaining 52,501 RSUs will vest thereafter in four equal installments every six months over two years subject to their continued service to us. Aside from the RSU vesting conditions, there were no other incentives or contingent arrangements in connection with this acquisition. We accounted for the 17,499 RSUs as part of the purchase consideration as the vesting of such RSUs did not require any post-combination services. We have accounted for the other 52,501 RSUs as stock-based compensation since the vesting of such RSUs requires post-combination services. Based on the foregoing, the total purchase price of this acquisition consists of the following:
			Amount in Thousands
	Cash consideration		$	1,000
	Fair value of fully vested RSUs (1)		573
	Total consideration		$	1,573
	-1	This represents the fair value of the 17,499 RSUs that were granted to IA’s former key employees which became fully vested upon closing. We determined the fair value for purchase price consideration purposes based on our closing stock price of $32.73 on December 20, 2014, the effective closing of the transaction.
	Of the total purchase price of $1.6 million, $1.0 million was allocated to the core/developed technology and $0.6 million was allocated to goodwill. The goodwill recognized in this transaction is deductible for tax purposes and is derived from expected benefits from cost synergies and former IA personnel who joined us after the acquisition.
	We are amortizing the developed technology on a straight-line basis over an estimated useful life of 7 years. Amortization expense for this intangible asset was insignificant for the year ended July 31, 2014.
	The acquisition-related transaction costs which were included in general and administrative expenses during the year ended July 31, 2014 in the consolidated statement of operations were insignificant.
	The historical financial results of IA were insignificant in relation to our consolidated results of operations. As such, we did not provide additional historical pro forma acquisition information.

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
	Goodwill
	Goodwill is generally not deductible for tax purposes in stock for stock transactions. The balance of goodwill as of July 31, 2014 and 2013 was $33.3 million and $32.7 million. The change in the carrying amount of goodwill for the year ended July 31, 2014 was as follows:
			Amount in Thousands
	Balance as of July 31, 2013		$	32,726
	Acquisition		567
	Balance as of July 31, 2014		$	33,293
	There were no changes in the carrying value of goodwill during the year ended July 31, 2013.
	Intangible Assets
	The gross carrying amount and accumulated amortization of our intangible assets other than goodwill were as follows:
	As of July 31, 2014	Amortization Period		Gross Value				Accumulated Amortization				Net Carrying Value		Weighted-Average Remaining Amortization Period
				(Dollars in thousands)
	Developed technology	5 to 7  years		$	7,305			$	(4,915	)		$	2,390	3.51 years
	Customer relationships	2 to 7 years		6,574				(5,343		)		1,231		1.57 years
	Trademarks	6 years		200				(142		)		58		1.75 years
	Patents	6 years		1,000				(583		)		417		2.50 years
	Total			$	15,079			$	(10,983	)		$	4,096
	As of July 31, 2013	Amortization Period		Gross Value				Accumulated Amortization				Net Carrying Value		Weighted-Average Remaining Amortization Period
				(Dollars in thousands)
	Developed technology	5 to 6  years		$	6,290			$	(3,976	)		$	2,314	2.73 years
	Customer relationships	2 to 7 years		6,574				(4,069		)		2,505		2.26 years
	Trademarks	6 years		200				(108		)		92		2.75 years
	Patents	6 years		1,000				(417		)		583		3.50 years
	Total			$	14,064			$	(8,570	)		$	5,494
	We recognized intangible asset amortization expense in the consolidated statements of operations as follows:
		Year Ended July 31,
		2014				2013				2012
		(In thousands)
	Cost of products and licenses revenue	$	1,110			$	1,015			$	1,302
	Sales and marketing	1,308				1,308				1,560
	Total intangible asset amortization expense	$	2,418			$	2,323			$	2,862
	As of July 31, 2014, estimated amortization expense related to our identifiable acquisition-related intangible assets in future periods is as follows:
	Fiscal Year Ending July 31,		Estimated Amortization Expense
			(In thousands)
	2015		$	2,173
	2016		1,048
	2017		323
	2018		208
	2019		145
	Thereafter		199
	Total		$	4,096

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Jul. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	Operating Leases
	We have entered into non-cancelable operating leases for facilities that expire at various dates through January 31, 2021. Rent under the agreements is expensed to operations on a straight-line basis over the terms of the leases. The aggregate future non-cancelable minimum lease payments for our operating leases as of July 31, 2014 consist of the following:
	Fiscal Year Ending July 31,	Operating Leases
		(In thousands)
	2015	$	4,779
	2016	4,684
	2017	4,278
	2018	3,846
	2019	3,918
	2020 and Thereafter	5,828
	Total	$	27,333
	Rent expense for all operating leases amounted to $4.7 million, $4.6 million and $2.0 million during the years ended July 31, 2014, 2013 and 2012.
	In May 2012, we entered into an agreement for the lease of an office building located in Santa Clara, California consisting of 127,000 square feet for an initial term of eight years which commenced in February 2013. This office building houses our corporate headquarters that we started occupying in March 2013. The annual base rent for this office lease ranges from approximately $3.2 million to $3.9 million over the term of the lease and we are also responsible for the payment of certain operating expenses, including utilities and real estate taxes. Pursuant to the terms of the lease agreement, we were obligated to provide a standby letter of credit in the amount of approximately $3.2 million as collateral for our full performance. In connection with this office lease, we received from the landlord leasehold incentives of approximately $6.0 million to make leasehold improvements to the leased office space. The leasehold incentive was recorded as leasehold improvements within property and equipment, net and as deferred rent within other liabilities in the consolidated balance sheets. The deferred rent liability is being amortized against rent expense over the term of the lease on a straight-line basis. The leasehold improvements are being amortized to expense over the shorter of the period from when the improvements were placed into service until the end of their respective useful lives or the lease term. As of July 31, 2014, $4.6 million lease incentives remained unamortized, of which $3.9 million was included in other liabilities and $0.7 million was included in accounts payable and accrued liabilities in the consolidated balance sheet.
	Contract Manufacturer Commitments
	The independent contract manufacturer that provides the substantial majority of our manufacturing, repair and supply chain operations procures components and builds our products based on our forecasts. These forecasts are based on estimates of future demand for our products, which are in turn based on historical trends and an analysis from our sales and marketing organizations, adjusted for overall market conditions. In order to reduce manufacturing lead times and plan for adequate component supply, we may issue purchase orders to this independent contract manufacturer which may not be cancelable. As of July 31, 2014, we had $6.9 million of open purchase orders with this independent contract manufacturer that may not be cancelable.
	Guarantees
	We have entered into agreements with some of our customers that contain indemnification provisions relating to potential situations where claims could be alleged that our products infringe the intellectual property rights of a third party. We have at our option and expense the ability to repair any infringement, replace product with a non-infringing equivalent-in-function product, or refund our customers the unamortized value of the product based on its estimated useful life, typically five years. Other guarantees or indemnification arrangements include guarantees of product and service performance and standby letters of credit for lease facilities and corporate credit cards. We have not recorded a liability related to these indemnification and guarantee provisions, and our guarantees and indemnification arrangements have not had any significant impact on our consolidated financial statements to date.
	Loss Contingencies and Legal Proceedings
	We are subject to the possibility of various loss contingencies arising in the ordinary course of business. An estimated loss contingency is accrued when it is probable that an asset has been impaired or a liability has been incurred and the range of loss can be reasonably estimated. However, the actual loss in any such contingency may be materially different from our estimates, which could result in the need to record additional expenses. If the amount of liability is not probable or the amount cannot be reasonably estimated, no accruals have been made. We regularly evaluate current information available to management to determine whether such accruals should be adjusted and whether new accruals are required in the periods presented.
	From time to time, we are subject to various legal proceedings, claims and litigation arising in the ordinary course of business. We do not believe we are party to any currently pending legal proceedings the outcome of which would have a material adverse effect on our financial position, results of operations or cash flows. There can be no assurance that existing or future legal proceedings arising in the ordinary course of business or otherwise will not have a material adverse effect on our financial position, results of operations or cash flows.
	Ansfield v. Infoblox Inc., et al., Case No. 3:14-cv-02500-VC (N.D. Cal.); Beqaj v. Infoblox Inc., et al., Case No. 3:14-cv-02564-VC (N.D. Cal.); and Achey, et al. v. Infoblox Inc., et al., Case No. 3:14-cv-02644-VC (N.D. Cal.).  Beginning on May 30, 2014, the first of three putative securities class action suits was filed in the United States District Court for the Northern District of California against the Company and two of its officers.  These suits, which have been deemed to be related cases, allege that defendants made materially false and misleading statements, or failed to disclose material facts, regarding the Company’s financial results, business, operations and prospects.  The various suits assert claims covering the period from September 5, 2013 through May 29, 2014, are purportedly brought on behalf of purchasers of the Company's securities during that period, and seek compensatory damages, interest, costs and expenses, as well as equitable or other relief.  On July 29, 2014, various members of the putative class filed motions for appointment as lead plaintiff(s) and approval of lead counsel, and also moved for consolidation of the various actions. On September 25, 2014, the lead plaintiffs were appointed and the suits consolidated.  The defendants do not need to respond to any of the existing complaints.  Instead, the lead plaintiffs will be permitted to file an amended consolidated complaint and defendants will thereafter respond to that amended pleading.  No discovery has yet occurred; pursuant to the provisions of the Private Securities Litigation Reform Act of 1995, all discovery and other proceedings are stayed until and unless a motion to dismiss is denied (or until defendants choose to answer rather than filing a motion to dismiss).  Due to the inherent uncertainties of litigation, we cannot accurately predict the ultimate outcome of this matter.  We are unable at this time to determine whether the outcome of the litigation would have a material impact on our results of operations, financial condition or cash flows.
	On April 16, 2013, Versata Software, Inc., or Versata, filed suit against us in the United States District Court for the District of Delaware in an action captioned Versata Software, Inc. F/K/A Trilogy Software, Inc.; and Versata Development Group, Inc. F/K/A Trilogy Development Group, Inc. v. Infoblox, Inc., Case No 1:13-cv-00678-UNA (D.Del.) (the “Action”).  In the Action, Versata alleges that we directly and/or indirectly infringed U.S. Patent Nos. 6,834,282; 6,907,414; 7,363,593 and 7,426,481 by making, using, licensing, selling and offering for sale software products and related services including but not limited to Infoblox IP Address Management. In December 2013, we filed a motion to dismiss the Action. A hearing was held on the motion in August 2014 and the parties are awaiting the ruling on the motion. We continue to believe we have meritorious defenses to the claims asserted in these actions and intend to defend vigorously against them. We believe at this time that liabilities associated with these cases, while possible, are not probable, and therefore we have not recorded any accrual for them as of July 31, 2014 and 2013. Further, any possible range of loss cannot be reasonably estimated at this time.

Common_Stock_Reserved_for_Issu

Common Stock Reserved for Issuance	12 Months Ended
	Jul. 31, 2014
Equity [Abstract]	'
Common Stock Reserved for Issuance	'
	COMMON STOCK RESERVED FOR ISSUANCE
	We had reserved shares of common stock for future issuance as follows:
		As of July 31,
		2014	2013
		(In thousands)
	Outstanding stock options	4,914	6,663
	Shares reserved for future grants	4,144	4,890
	Outstanding restricted stock units	3,442	1,986
	Shares reserved for employee stock purchase plan	1,302	1,411
		13,802	14,950

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Jul. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Employee Benefit Plans	'
	EMPLOYEE BENEFIT PLANS
	Stock-based Compensation Plans
	Our stock-based compensation plans include the 2012 Equity Incentive Plan (the “2012 Plan”), the 2005 Stock Plan (the “2005 Plan”), the 2003 Stock Plan (the “2003 Plan”), (collectively the “Plans”) and the 2012 Employee Stock Purchase Plan (the "ESPP"). Under the Plans, we have granted (or in the case of acquired plans, assumed) stock options and RSUs. We have issued common stock under the ESPP.
	2012 Equity Incentive Plan
	In April 2012, our board of directors approved and we adopted the 2012 Plan. It was subsequently amended in December 2012. Under the 2012 Plan, we have the ability to issue incentive stock options (“ISOs”), nonstatutory stock options (“NSOs”), restricted stock units, restricted stock awards (“RSAs”), stock appreciation rights (“SARs”), stock bonus awards or performance awards. ISOs may be granted to employees with exercise prices not less than the fair value of the common stock on the grant date as determined by the board of directors, and NSOs may be granted to employees, directors or consultants at exercise prices not less than 85% of the fair value of the common stock on the grant date as determined by the board of directors. If, at the time we grant an option, the optionee directly or by attribution owns stock possessing more than 10% of the total combined voting power of all classes of our stock, the exercise price must be at least 110% of the fair value of the common stock on the grant date as determined by the board of directors. Options, RSUs, RSAs, SARs, stock bonus awards and performance awards may be granted with vesting terms as determined by the board of directors and expire no more than ten years after the date of grant or earlier if employment or service is terminated. As of July 31, 2014, 4.1 million shares were available for grant under the 2012 Plan.
	2003 Stock Plan
	In March 2003, our board of directors approved and we adopted the 2003 Plan. As of April 20, 2012, no shares were available for grant under the 2003 Plan and all outstanding options would continue to be governed and remain outstanding in accordance with their existing terms. In addition, any shares subject to outstanding awards under the 2003 Plan that are issuable upon the exercise of options that expire or become unexercisable for any reason without having been exercised in full will be available for future grant and issuance under the 2012 Plan.
	Employee Stock Purchase Plan
	Concurrent with the effectiveness of our registration statement on Form S-1 on April 19, 2012, the ESPP became effective. It was subsequently amended in December 2012 and February 2014. The ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to plan limitations. The ESPP provides for a 24-month offering period comprised of four purchase periods of approximately six months. Employees are able to purchase shares at 85% of the lower of the fair market value of the Company’s common stock (i) at the date of commencement of the offering period or (ii) at the last day of the purchase period. Employees purchased approximately 0.6 million shares at an average price per share of $12.7 and 0.6 million shares at an average price per share of $13.80 under our ESPP during the years ended July 31, 2014 and 2013. There were no shares purchased by employees under the ESPP in fiscal year 2012. As of July 31, 2014, 1.3 million shares were available for future issuance under the ESPP.
	The following table summarizes the stock-based compensation expense by line item in the Consolidated Statements of Operations:
		Year Ended July 31,
		2014				2013				2012
		(In thousands)
	Cost of revenue	$	3,619			$	1,606			$	700
	Research and development	7,375				4,659				2,363
	Sales and marketing	22,919				11,721				5,409
	General and administrative	7,058				4,078				2,180
	Total stock-based compensation	$	40,971			$	22,064			$	10,652
	The following table summarizes the stock-based compensation expense by award type:
		Year Ended July 31,
		2014				2013				2012
		(In thousands)
	Stock options	$	12,252			$	10,061			$	8,249
	RSUs	24,359				6,084				13
	ESPP	4,360				5,919				2,390
	Total stock-based compensation	$	40,971			$	22,064			$	10,652
	The following table summarizes the unrecognized stock-based compensation balance, net of estimated forfeitures, by type of awards as of July 31, 2014:
			As of July 31, 2014				Weighted-Average Amortization Period
			(In thousands)				(In years)
	Restricted stock units		$	63,786			2.77
	Stock options		14,657				1.95
	ESPP		8,672				1.28
	Total unrecognized stock-based compensation balance		$	87,115			2.48
	Determination of Fair Value
	The estimated grant date fair value of our stock options and ESPP awards was calculated using the BSM option-pricing model, based on the following assumptions:
		Year Ended July 31,
		2014				2013				2012
	Employee Stock Options:
	Expected term (in years)	6.08				6.08				6.08
	Risk-free interest rate	1.86		%		1.04		%		0.91		%
	Expected volatility	55		%		54		%		56		%
	Dividend rate	—		%		—		%		—		%
	Weighted average fair value per share	$	16.75			$	10.49			$	5.75
	ESPP:
	Expected term (in years)	0.50-2.00				0.50 - 2.00				0.67 - 2.17
	Risk-free interest rate	0.06% - 0.48%				0.09% - 0.38%				0.15% - 0.31%
	Expected volatility	55% - 77%				47% - 58%				53% - 58%
	Dividend rate	—		%		—		%		—		%
	Weighted average fair value per share	$6.12 - $12.87				$7.07 - $10.77				$	9.4
	Determination of Fair Value
	The exercise price per share of our options to purchase common stock is the closing sale price per share of our common stock as quoted on the New York Stock Exchange on the date of grant.
	The fair value of each grant of stock options was determined using the BSM option pricing model and assumptions discussed below. Each of the fair value inputs is subjective and generally requires significant judgment to determine.
	Expected Term-The expected term represents the period that our stock-based awards are expected to be outstanding. For option grants that are considered to be “plain vanilla,” we determine the expected term using the simplified method as provided by the SEC. The simplified method deems the term to be the average of the time-to-vesting and the contractual life of the options. For other option grants, we estimate expected term using historical data on employee exercises and post-vesting employment termination behavior taking into account the contractual life of the award. The expected term for the ESPP is based on the term of the purchase period.
	Risk-Free Interest Rate-The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for zero coupon U.S. Treasury notes with maturities approximately equal to the option's expected term.
	Expected Volatility-Since we only have a short trading history of our common stock, we use a blended volatility to estimate expected volatility. The blended volatility includes a weighting of our historical volatility from the date of our IPO to the respective grant date and the average historical stock volatilities of several unrelated public companies within our industry that we consider to be comparable to our business over a period equivalent to the expected term of the stock option grants.
	Dividend Rate-The expected dividend is based on our history and expected dividend payouts. The expected dividend yield is zero as the Company has historically paid no dividends and does not anticipate dividends to be paid in the future.
	Forfeiture Rate-We estimate our forfeiture rate based on an analysis of our actual forfeitures and will continue to evaluate the adequacy of the forfeiture rate based on actual forfeiture experience, analysis of employee turnover behavior and other factors. The impact from any forfeiture rate adjustment would be recognized in full in the period of adjustment, and if the actual number of future forfeitures differs from our estimates, we might be required to record adjustments to stock-based compensation in future periods.
	Pre-IPO Common Stock Valuations
	For all option grants prior to our IPO, the fair value of the common stock underlying the option grants was determined by our board of directors, with the assistance of management, which intended all options granted to be exercisable at a price per share not less than the per share fair value of our common stock underlying those options on the date of grant. Because there was no public market for our common stock before our IPO, our board of directors determined the fair value of the common stock at the time of grant of the option by considering a number of objective and subjective factors, including valuations of comparable companies, sales of our convertible preferred stock to unrelated third parties, operating and financial performance, the lack of liquidity of our capital stock and general and industry specific economic outlook. We did not grant stock options with an exercise price that was less than the fair value of the underlying common stock as determined at the time of grant by our board of directors. The fair value of the underlying common stock was determined by our board of directors until our IPO.
	Stock Option Activity
	The following table summarizes the stock option activity and related information as of and for the three years ended July 31, 2014 under our Plans:
		Options Outstanding
		Number of Shares Underlying Outstanding Options			Weighted-Average Exercise Price				Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
	(In thousands)							(In years)		(In thousands)
Outstanding as of July 31, 2011	9,567			$	4.46			7.63		$	50,224
Options granted	3,274			10.84
Options exercised	(629	)		3.58
Options forfeited/expired	(365	)		7.89
Outstanding as of July 31, 2012	11,847			$	6.16			7.3		$	176,037
Options granted	841			20.62
Options exercised	(5,320	)		4.02
Options forfeited/expired	(705	)		9.39
Outstanding as of July 31, 2013	6,663			$	9.35			7.47		$	155,580
Options granted	523			31.83
Options exercised	(2,052	)		6.74
Options forfeited/expired	(220	)		16.17
Outstanding as of July 31, 2014	4,914			$	12.52			6.67		$	14,980
Vested and expected to vest - July 31, 2014	4,767			$	12.27			6.62		$	14,879
Exercisable - July 31, 2014	2,950			$	8.81			5.77		$	12,976
The aggregate intrinsic value represents the difference between the Company's closing stock price on the last trading day of the period and the exercise price multiplied by the number of the related options. The pre-tax intrinsic value of options exercised, representing the difference between the fair market value of the Company's common stock on the date of the exercise and the exercise price of each option, was $57.0 million and $93.6 million and $5.9 million for fiscal 2014, 2013 and 2012. Total grant date fair value of options vested during fiscal 2014, 2013 and 2012 was $12.7 million, $10.2 million and $6.7 million.
The following table summarizes information about stock options outstanding and exercisable under the Plans as of July 31, 2014:
		Options Outstanding									Options Exercisable
Range of Exercise Price		Number of Shares			Weighted-Average		Weighted-Average Exercise Price per Share				Number of	Weighted-Average
		Underlying Outstanding Options			Remaining Contractual Life						Shares	Exercise Price per Share
											Underlying Exercisable Options
		(In thousands)			(In Years)						(In thousands)
$0.60 - $4.53		828			3.57		$	3.2			828	$	3.2
$6.33 - $7.08		458			5.98		$	6.42			443	$	6.4
$9.12		894			6.72		$	9.12			493	$	9.12
$9.33 - $9.66		629			6.12		$	9.57			478	$	9.57
$9.78 - $11.25		598			7.5		$	10.95			303	$	10.92
$13.37 - $17.52		578			8.22		$	15.99			164	$	16.46
$17.89 - $22.61		493			8.28		$	20.98			200	$	20.29
$27.57 - $33.70		246			9.05		$	30.33			32	$	30.08
$43.09		172			8.7		$	43.09			9	$	43.09
$44.47		18			9.19		$	44.47			—	$	—
		4,914			6.67		$	12.52			2,950	$	8.81
Restricted Stock Unit Activity
RSUs generally vest ratably over a period of four years from the date of grant subject to the employee’s continuing service to the Company over that period. Until vested, RSUs do not have the voting and dividend participation rights of common stock and the shares underlying the awards are not considered issued and outstanding. RSUs are converted into shares of the Company’s common stock upon vesting on a one-for-one basis. The cost of the RSUs is determined using the fair value of the Company’s common stock on the date of the grant. Compensation is recognized on a straight-line basis over the requisite service period of each grant adjusted for estimated forfeitures.
A summary of the restricted stock unit activity during the three years ended July 31, 2014 is presented below:
		Number of Units			Weighted-Average Grant Date Fair Value Per Share
		(In thousands)
Outstanding as of July 31, 2012		36			$	18.68
Granted		2,107			$	21.44
Vested		(25	)		$	20.36
Cancellations due to forfeitures		(132	)		$	19.86
Outstanding as of July 31, 2013		1,986			$	21.15
Granted		2,432			$	29.72
Vested		(699	)		$	22.37
Cancellations due to forfeitures		(277	)		$	29.9
Outstanding as of July 31, 2014		3,442			$	26.47
We did not grant any restricted stock units prior to fiscal 2012.
Shares Available for Grant
The following table presents the stock grant activity and the total number of shares available for grant under the 2012 Plan as of July 31, 2014:
	2012 Plan
	(In thousands)
Balance at July 31, 2013	4,890
Additional shares authorized for issuance	1,712
Options granted	(523	)
RSUs granted	(2,432	)
Options forfeited/expired(1)	220
RSUs forfeited/expired	277
Balance at July 31, 2014	4,144
-1	Includes forfeited or expired options under the 2003 Plan that forfeited or expired unexercised which became available for grant under the 2012 Plan according to its terms. Any shares subject to outstanding awards under the 2003 Plan that are issuable upon the exercise of options that expire or become unexercisable for any reason without having been exercised in full will be available for future grant and issuance under the 2012 Plan.
Employee 401(k) Plan
We have a qualified contributory savings plan under Section 401(k) of the Internal Revenue Code covering substantially all of our United States employees. Each participant in the plan could elect to contribute up to $17,000 of his or her annual compensation to the plan for the calendar year 2012 and up to $17,500 for 2014 and 2013. Individuals who were 50 or older could contribute up to $23,000 of their annual income. Although the plan provides for a discretionary employer matching contribution, to date we have not made such a contribution on behalf of employees.

Income_Taxes

Income Taxes	12 Months Ended
	Jul. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	Our geographical breakdown of income (loss) before provision for income taxes for the years ended July 31, 2014, 2013 and 2012 is as follows:
		Year Ended July 31,
		2014			2013			2012
		(In thousands)
	Domestic	$	(24,964	)	$	(5,501	)	$	(9,203	)
	International	1,966			1,745			1,737
	Loss before provision for income taxes	$	(22,998	)	$	(3,756	)	$	(7,466	)
	The components of the provision for income taxes are as follows:
		Year Ended July 31,
		2014			2013			2012
		(In thousands)
	Current:
	State	$	209		$	539		$	360
	Foreign	416			328			751
	Federal	—			—			(353		)
	Total current	625			867			758
	Deferred:
	Foreign	294			(217		)	(14		)
	Provision for income taxes	$	919		$	650		$	744
	The reconciliation of the statutory federal income tax and our effective income tax is as follows:
		Year Ended July 31,
		2014			2013			2012
		(In thousands)
	Tax at statutory federal rate	$	(8,049	)	$	(1,314	)	$	(2,613	)
	Stock-based compensation and other permanent items	3,696			2,765			2,710
	R&D credit	(528		)	(958		)	(382		)
	Change in valuation allowance	5,663			515			1,017
	Foreign rate differential	23			(500		)	130
	State tax—net of federal benefit	158			477			230
	Foreign tax credit	(6		)	(308		)	—
	Alternative minimum tax	—			—			(353		)
	Other	(38		)	(27		)	5
	Provision for income taxes	$	919		$	650		$	744
	The components of the deferred tax assets, net are as follows:
		As of July 31,
		2014			2013
		(In thousands)
	Deferred tax assets:
	Net operating loss carryforwards	$	13,814		$	17,499
	Deferred revenue	11,259			8,193
	Stock-based compensation	8,800			4,124
	Accruals, reserves and other	7,193			7,616
	Tax credit carryforwards	7,195			6,042
	Other fixed assets depreciation	393			—
	Gross deferred tax asset	48,654			43,474
	Valuation allowance	(48,136		)	(41,400		)
	Total deferred tax asset	518			2,074
	Deferred tax liabilities:
	Other identified intangibles	(510		)	(1,273		)
	Other fixed assets depreciation	—			(502		)
	Total deferred tax liability	(510		)	(1,775		)
	Net deferred tax assets	$	8		$	299
	Recognition of deferred tax assets is appropriate when realization of these assets is more-likely-than-not. Based upon the weight of available evidence, which includes our historical operating performance and our ability to generate sufficient taxable income in the future, we recorded a full valuation allowance of $47.8 million and $41.4 million against the net U.S. deferred tax assets as of July 31, 2014 and 2013.We also recorded a $0.3 million valuation allowance against all Canadian deferred tax assets as of July 31, 2014 based upon the same above-mentioned criteria. The net valuation allowance increased by $6.7 million during the year ended July 31, 2014. The need for valuation allowance is subject to adjustment in future periods if sufficient positive evidence exists to support reversal.
	As of July 31, 2014, we had U.S. federal net operating loss carryforwards of $147.2 million and California net operating loss carryforwards of $43.3 million. The federal net operating loss carryforwards will expire at various dates beginning in the year ending July 31, 2021 if not utilized. The California net operating loss carryforwards will expire at various dates beginning in the year ending July 31, 2018 if not utilized. Additionally, as of July 31, 2014, we had U.S. federal and California research and development credit carryforwards of $5.5 million and $4.9 million. Based on current tax laws, the federal R&D credit expired on December 31, 2013. The federal credit carryforwards will begin to expire at various dates beginning in 2023 while the California credit carryforwards are not subject to expiration. As of July 31, 2014, we also had Canadian scientific research and development credit carryforwards of $0.6 million which will expire beginning in 2034.
	Net operating losses of approximately $113.9 million have not been included in the deferred tax asset table above as these net operating losses are attributable to excess tax benefits associated with equity related settlements. These benefits will not be recognized in the financial statements until they result in a reduction in taxes payable. When recognized in the financial statements, the tax benefit will be recorded to stockholders' equity. During the year ended July 31, 2014, we recognized approximately $0.2 million of excess tax benefits which resulted in a credit to stockholders' equity.
	Utilization of our net operating loss and credit carryforwards may be subject to a substantial annual limitation provided for in the Internal Revenue Code and similar state codes. Such annual limitation could result in the expiration of net operating loss and credit carryforwards before utilization. We do not believe that such limitation rules will have a material impact on the financial statements.
	Our policy with respect to our undistributed foreign subsidiaries' earnings is to consider those earnings to be indefinitely reinvested and, accordingly, no related provision for U.S. federal and state income taxes has been provided. Upon distribution of those earnings in the form of dividends or otherwise, we may be subject to both U.S. income taxes (subject to an adjustment for foreign tax credits) and withholding taxes in the various countries. At July 31, 2014, the undistributed earnings approximated $2.4 million and the unrecorded deferred tax liability is estimated to be approximately $0.8 million.
	Uncertain Tax Positions
	As of July 31, 2014, 2013 and 2012, we had gross unrecognized tax benefits of $2.9 million, $2.3 million and $1.3 million. The balance of gross unrecognized tax benefits at July 31, 2014 includes approximately $0.2 million related to certain foreign and U.S. deferred tax assets with a corresponding valuation allowance. If recognized, the impact on our effective tax rate would not be material due to the full valuation allowance. We have not accrued interest and penalties related to unrecognized tax benefits reflected in the consolidated financial statements during the years ended July 31, 2014, 2013 and 2012. Our policy for classifying interest and penalties associated with unrecognized income tax benefits is to include such items in income tax expense.
	The following table summarizes the activity related to the unrecognized tax benefits:
		Year Ended July 31,
		2014			2013			2012
	(In thousands)
Gross unrecognized tax benefits beginning balance	$	2,268		$	1,342		$	998
Increases related to tax positions taken during current year	612			762			200
Increases (Decreases) related to tax positions from prior years	(17		)	164			144
Gross unrecognized tax benefits	$	2,863		$	2,268		$	1,342
We believe that the change to our unrecognized tax benefits in the next 12 months will not be material to our consolidated financial statements.
We are subject to taxation in the United States, various states and several foreign jurisdictions. We are not currently under examination in any major jurisdiction. All years for U.S. federal and state jurisdictions and fiscal years 2009 through 2014 for our major foreign jurisdictions remain subject to examination for income tax purposes.

Segment_Information

Segment Information	12 Months Ended
	Jul. 31, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	SEGMENT INFORMATION
	We operate in one single segment. The following table represents net revenue based on the customer’s location, as determined by the customer’s shipping address:
		Year Ended July 31,
		2014		2013		2012
		(In thousands)
	Americas	$	164,323	$	147,017	$	108,660
	Europe, Middle East and Africa	58,570		54,378		40,666
	Asia Pacific	27,447		23,649		19,920
	Total net revenue	$	250,340	$	225,044	$	169,246
	Included within the Americas total in the above table was revenue from sales in the U.S. of $154.9 million, $138.9 million and $100.6 million during the years ended July 31, 2014, 2013 and 2012. Aside from the U.S., no other country comprised 10% of our net revenue for the years ended July 31, 2014, 2013, or 2012.
	Our property and equipment, net by location is summarized as follows:
		As of July 31,
		2014		2013
		(In thousands)
	Americas	$	17,882	$	17,997
	Asia Pacific	234		224
	Europe, Middle East and Africa	669		149
		$	18,785	$	18,370
	Included within the Americas total in the above table was property and equipment, net in the U.S. of $17.8 million and $18.0 million as of July 31, 2014 and 2013.

Unautited_Quarterly_Financial_

Unautited Quarterly Financial Data	12 Months Ended
	Jul. 31, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Unaudited Quarterly Financial Data	'
	UNAUDITED QUARTERLY FINANCIAL DATA
	The following tables set forth our unaudited quarterly consolidated statement of operations data for each of the last eight quarters in the period ended July 31, 2014. The unaudited quarterly consolidated statement of operations data below have been prepared on the same basis as the audited consolidated financial statements included elsewhere in this Annual Report on Form 10-K and reflect all necessary adjustments, consisting only of normal recurring adjustments, that we believe are necessary for a fair statement of this information. The results of historical quarters are not necessarily indicative of the results of operations for a full year or any future period.
	Fiscal 2014
		Three Months Ended
		October 31,			January 31,			April 30,			July 31,
		2013			2014			2014			2014
		(In thousands, except per share amounts)
	Net revenue:
	Products and licenses	$	35,962		$	31,565		$	30,799		$	32,022
	Services	27,559			29,317			30,223			32,893
	Total net revenue	63,521			60,882			61,022			64,915
	Cost of revenue:
	Products and licenses	7,887			7,086			7,119			7,235
	Services	5,821			6,633			6,665			7,352
	Total cost of revenue	13,708			13,719			13,784			14,587
	Gross profit	49,813			47,163			47,238			50,328
	Operating expenses:
	Research and development	11,600			11,844			12,175			13,670
	Sales and marketing	33,131			32,854			34,589			38,038
	General and administrative	6,986			6,848			7,839			7,948
	Total operating expenses	51,717			51,546			54,603			59,656
	Loss from operations	(1,904		)	(4,383		)	(7,365		)	(9,328		)
	Other income (expense), net	(101		)	(103		)	124			62
	Loss before provision for (benefit from) income taxes	(2,005		)	(4,486		)	(7,241		)	(9,266		)
	Provision for (benefit from) income taxes	544			(92		)	201			266
	Net loss	$	(2,549	)	$	(4,394	)	$	(7,442	)	$	(9,532	)
	Net loss per share - basic and diluted	$	(0.05	)	$	(0.08	)	$	(0.14	)	$	(0.17	)
	Fiscal 2013
		Three Months Ended
		October 31,			January 31,			April 30,			July  31,
		2012			2013			2013			2013
		(In thousands, except per share amounts)
	Net revenue:
	Products and licenses	$	27,098		$	30,807		$	33,596		$	36,702
	Services	22,407			23,632			24,439			26,363
	Total net revenue	49,505			54,439			58,035			63,065
	Cost of revenue:
	Products and licenses	5,840			7,100			7,786			8,502
	Services	4,249			4,542			4,910			5,324
	Total cost of revenue	10,089			11,642			12,696			13,826
	Gross profit	39,416			42,797			45,339			49,239
	Operating expenses:
	Research and development	10,214			10,593			10,976			11,273
	Sales and marketing	25,631			29,108			28,138			29,508
	General and administrative	5,658			5,493			6,195			7,142
	Total operating expenses	41,503			45,194			45,309			47,923
	Loss from operations	(2,087		)	(2,397		)	30			1,316
	Other expense, net	(106		)	(220		)	(45		)	(247		)
	Loss before provision for (benefit from) income taxes	(2,193		)	(2,617		)	(15		)	1,069
	Provision for (benefit from) income taxes	197			629			242			(418		)
	Net loss	$	(2,390	)	$	(3,246	)	$	(257	)	$	1,487
	Net loss per share - basic and diluted	$	(0.05	)	$	(0.07	)	$	(0.01	)	$	0.03
	Basic and diluted earnings per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.

Description_of_the_Business_an1

Description of the Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jul. 31, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and include all adjustments necessary for the fair presentation of our consolidated financial position, results of operations and cash flows for the periods presented. The accompanying consolidated financial statements include the accounts of Infoblox Inc. and our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	'
	Use of Estimates
	The preparation of the accompanying consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Those management estimates and assumptions affect revenue recognition, determination of fair value of stock-based awards, valuation of goodwill and intangible assets acquired, impairment of goodwill and other intangible assets, amortization of intangible assets, contingencies and litigation, accounting for income taxes, including the valuation reserve on deferred tax assets and uncertain tax positions, allowances for doubtful accounts, warranty reserve and sales returns and valuation of inventory. We evaluate our estimates and assumptions on an ongoing basis using historical experience and other factors and adjust those estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the consolidated financial statements.
Concentration of Supply Risk with Contract Manufacturer	'
	Concentration of Supply Risk with Contract Manufacturer
	We outsource the substantial majority of our manufacturing, repair and supply chain management operations to one independent contract manufacturer. The inability of the manufacturer to fulfill our supply requirements could have a material and adverse effect on our business and consolidated financial statements.
	In addition, our independent contract manufacturer procures components and manufactures our products based on our demand forecasts. These forecasts are based on our estimates of future demand for our products, which are in turn based on historical trends and an analysis from our sales and marketing organizations, adjusted for overall market conditions. We may be subject to the requirement to purchase inventory or to pay additional fees to the contract manufacturer if there is a significant difference in scheduled shipments or if the contract manufacturer holds inventory longer than a specified period. In 2012, we recorded a charge of $0.4 million for non-cancelable purchase commitments to our contract manufacturer for inventory which we deemed as excess and obsolete. This amount was recognized in products and licenses cost of revenue in the consolidated statement of operations for the year ended July 31, 2012. No significant charge was recorded in 2014 or 2013.
Concentrations of Credit Risk	'
	Concentrations of Credit Risk
	Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents, restricted cash and accounts receivable. Our cash, cash equivalents and restricted cash are invested in high-credit quality financial instruments held mainly in two US banks. Such deposits may be in excess of insured limits provided on such deposits.
	We mitigate credit risk in respect to accounts receivable by performing ongoing credit evaluations of our customers and maintaining a reserve for potential credit losses. In addition, we generally require our customers to prepay for maintenance and support services to mitigate the risk of uncollectible accounts receivable.
Reverse Stock Split	'
	Reverse Stock Split
	On April 3, 2012, our board of directors approved a 1-for-3 reverse split of our common stock, which became effective on April 10, 2012. Upon the effectiveness of the reverse stock split, (i) every three shares of outstanding common stock were decreased to one share of common stock, (ii) the number of shares of common stock into which each outstanding option to purchase common stock is exercisable have been proportionally decreased on a 1-for-3 basis, (iii) the exercise price of each outstanding option to purchase common stock have been proportionately increased, and (iv) the conversion ratio for each share of preferred stock outstanding have been proportionately reduced. All of the share numbers, share prices, and exercise prices have been adjusted within these financial statements, on a retroactive basis, to reflect this 1-for-3 reverse stock split.
Cash and Cash Equivalents, Restricted Cash	'
	Cash and Cash Equivalents
	All highly liquid investments purchased with an original maturity of three months or less are classified as cash and cash equivalents. Cash and cash equivalents consist of cash on hand, demand deposits with banks, highly liquid investments in money market funds, U.S. Treasury securities and certificates of deposit which are readily convertible into cash.
	Restricted Cash
	Under our facility lease arrangements, we are required to maintain letters of credit from a U.S. bank as security for performance under these agreements. The letters of credit are generally invested in U.S. Treasury securities or money market funds or interest-bearing accounts in amounts equal to the letters of credit, which are classified as restricted cash on the consolidated balance sheets. Restricted cash, which is shown under non-current assets in the consolidated balance sheets, amounted to $3.5 million as of July 31, 2014 and 2013.
Short-term Investments	'
	Short-term Investments
	Investments with original maturities at purchase of greater than three months are classified as short-term or long-term investments. Management determines the appropriate classification of securities at the time of purchase and re-evaluates such classification as of each balance sheet date.
	Our investments in publicly-traded debt securities are classified as available-for-sale. Available-for-sale investments are initially recorded at cost and periodically adjusted to fair value in the consolidated balance sheets. Unrealized gains and losses on these investments are reported as a separate component of accumulated other comprehensive income (loss). Realized gains and losses are determined based on the specific identification method and are reported in the consolidated statements of operations. The investments are adjusted for amortization of premiums and discounts to maturity and such amortization is included in other expense, net.
	We recognize an impairment charge for available-for-sale investments when a decline in the fair value of our investments below the cost basis is determined to be other than temporary. We consider various factors in determining whether to recognize an impairment charge, including the length of time the investment has been in a loss position, the extent to which the fair value has been less than the cost basis, the investment's financial condition and near-term prospects, and our intent to sell, or whether it is more likely than not we will be required to sell, the investment before recovery of the investment's amortized cost basis. If we determine that the decline in an investment's fair value is other than temporary, the difference is recognized as an impairment loss in our consolidated statements of operations. During the year ended July 31, 2014, we did not consider any of our investments to be other-than-temporarily impaired.
Fair Value	'
	Fair Value
	Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining fair value, we consider the principal or most advantageous market in which we transact, and consider assumptions that market participants would use when pricing the asset or liability. We apply the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:
	Level I - Quoted prices in active markets for identical assets or liabilities.
	Level II - 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. These inputs are valued using market based approaches.
	Level III - Inputs are unobservable inputs based on management assumptions. These inputs, if any, are valued using internal financial models.
Inventory	'
	Inventory
	Inventories are stated at the lower of standard cost, which approximates actual cost (first-in, first-out), or market value (estimated net realizable value). The valuation of inventories at the lower of cost or market value requires the use of estimates regarding the amount of inventory that will be sold and the prices at which current inventory will be sold. These estimates are dependent on our assessment of current and expected orders from our customers. If actual market conditions are less favorable than those projected by management, inventory write-downs may be required. Our finished goods mainly consist of appliances that are used for the replacement of failed units under maintenance and support agreements and finished goods needed for our expanded depot requirements. We write down refurbished inventory based on the age of the units and number of hardware failures. During the years ended July 31, 2014, 2013 and 2012, inventory write-downs were $1.3 million, $1.1 million and $0.6 million.
Property and Equipment, Net	'
	Property and Equipment, Net
	Property and equipment, including leasehold improvements, are stated at cost, less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets, which are two to three years. Leasehold improvements are amortized on a straight-line basis over the shorter of the estimated useful lives of the assets or the remaining lease term. Upon the retirement or disposition of property and equipment, the related costs and accumulated depreciation are removed from, and the resulting gain or loss is included in, the consolidated statements of operations. Repair and maintenance costs that do not extend the life or improve an asset are charged to expense as incurred.
Goodwill	'
	Goodwill, Intangible Assets and Other Long-Lived Assets
	Goodwill represents the future economic benefits arising from other assets acquired in a business combination or an acquisition that are not individually identified and separately recorded. The excess of the purchase price over the estimated fair value of net assets of businesses acquired in a business combination is recognized as goodwill.
	Intangible assets consist of identifiable intangible assets, including developed technology, customer relationships, non-compete agreements, trademarks and patents, resulting from our acquisitions. Intangible assets are recorded at fair value, net of accumulated amortization. Intangible assets are amortized on a straight-line basis over their estimated useful lives. Amortization expense is included as a component of cost of products and licenses revenue and sales and marketing expense in the accompanying consolidated statements of operations. Amounts included in sales and marketing expense relate to amortization of intangible asset attributed to customer relationships.
	Goodwill and other intangible assets acquired in a business combination and determined to have an indefinite useful life are not amortized, but instead tested for impairment at least annually during the fourth quarter. Such goodwill and other intangible assets may also be tested for impairment between annual tests in the presence of impairment indicators such as, but not limited to: (a) a significant adverse change in legal factors or in the business climate; (b) a substantial decline in our market capitalization, (c) an adverse action or assessment by a regulator; (d) unanticipated competition; (e) loss of key personnel; (f) a more likely-than-not expectation of sale or disposal of a reporting unit or a significant portion thereof; (g) a realignment of our resources or restructuring of our existing businesses in response to changes to industry and market conditions; (h) testing for recoverability of a significant asset group within a reporting unit; or (i) higher discount rate used in the impairment analysis as impacted by an increase in interest rates.
Impairment of Long-Lived Assets	'
	Long-lived assets, such as property and equipment and intangible assets subject to depreciation and amortization, are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. Among the factors and circumstances we considered in determining recoverability are: (i) a significant decrease in the market price of a long-lived asset; (ii) a significant adverse change in the extent or manner in which a long-lived asset is being used or in its physical condition; (iii) a significant adverse change in legal factors or in the business climate that could affect the value of a long-lived asset, including an adverse action or assessment by a regulator; (iv) an accumulation of costs significantly in excess of the amount originally expected for the acquisition and (v) current-period operating or cash flow loss combined with a history of operating or cash flow losses or a projection or forecast that demonstrates continuing losses associated with the use of a long-lived asset. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset.
	There have been no indicators of impairment of goodwill, intangible assets and other long-lived assets, and we did not record any impairment losses during the years ended July 31, 2014, 2013 and 2012.
Revenue Recognition	'
	Revenue Recognition
	We generate revenue from the sales or licensing of hardware and software products, support and maintenance, and other services through a direct sales force and indirect relationships with our partners. Revenue is recognized when all of the following criteria are met:
	Persuasive evidence of an arrangement exists. Evidence of an arrangement generally consists of a purchase order issued pursuant to the terms and conditions of a distributor or value-added reseller agreement or, in limited cases, an end-user agreement.
	Delivery or performance has occurred. We use shipping and related documents, distributor sell-through reports, or written evidence of customer acceptance, when applicable, to verify delivery or performance. We do not recognize product revenue until transfer of title and risk of loss, which generally is upon shipment to value-added resellers or end-users.
	The sales price is fixed or determinable. We assess whether the sales price is fixed or determinable based on payment terms and whether the sales price is subject to refund or adjustment.
	Collection is probable. We assess probability of collection on a customer-by-customer basis. We subject our customers to a credit review process that evaluates their financial condition and ability to pay for our products and services. If we conclude that collection is not probable, we do not recognize revenue until cash is received.
	We recognize product revenue at the time of shipment provided that all other revenue recognition criteria have been met. Services revenue includes maintenance and support, training and consulting, and subscription services revenue. Maintenance and support revenue includes arrangements for software maintenance and technical support for our products and licenses. Maintenance is offered under renewable, fee-based contracts, which include 24-hour technical support, hardware repair and replacement parts, bug fixes, patches and unspecified upgrades on a when-and-if-available basis. Revenue from customer maintenance and support contracts and subscription services is deferred and recognized ratably over the contractual period, generally one to three years. Revenue from consulting and training is recognized as the services are completed.
	We operate a multiple tier channel distribution model that includes distributors, value-added resellers and direct sales to end-users. For sales to value-added resellers and end-users, we recognize product revenue upon transfer of title and risk of loss, which is generally upon shipment. It is our practice to identify an end-user prior to shipment to a value-added reseller. For the end-users and value-added resellers, we generally have no significant contractual obligations for future performance, such as rights of return or pricing credits. However, we may on occasion enter into arrangements with end-users or value-added resellers that include some form of rights of return, rebates or price protection. Also, we may occasionally accept returns by end-users or value-added resellers to address customer satisfaction issues or solution fit issues even though there is no contractual provision for such returns. We record reductions to revenue for estimated product returns and pricing adjustments in the same period that the related revenue is recorded. The amount of these reductions is based on historical sales returns and price adjustments, specific provisions for returns, price protection or rebates in agreements, and other factors known at the time. Should actual product returns or pricing adjustments differ from estimates, additional reductions to revenue may be required. Distributor revenue is subject to agreements that may allow pricing credits, price protection, rebates and rights of return or involve international jurisdictions where the risk of returns or credits is considered to be high even though distributors do not have these contractual rights. As a consequence, the Company has determined that the sales price is not fixed or determinable at the time of shipment to a distributor and thus revenue and related costs of sales for these shipments are deferred until information is received from the distributor indicating that the product has been sold through to an end customer or value added reseller.
Multiple Element Arrangments	'
	Multiple Element Arrangements
	We enter into multiple element revenue arrangements in which a customer may purchase a combination of hardware, software, software upgrades, hardware and software maintenance and support, training and consulting, and subscription services. We account for multiple agreements with a single customer as one arrangement if the contractual terms and/or substance of those agreements indicate that they may be so closely related that they are, in effect, parts of a single arrangement.
	Most of our products are hardware appliances containing software components that operate together to provide the essential functionality of the product. Therefore, the software sold with our hardware appliances are considered non-software deliverables and are not accounted for under the industry-specific software revenue recognition guidance.
	Our products and licenses revenue also includes stand-alone software products. Stand-alone software may operate on our hardware appliances, but is not considered essential to the functionality of the hardware and continues to be subject to the industry-specific software revenue recognition guidance. The industry-specific software revenue recognition guidance includes the use of the residual method under which the amount of revenue allocated to delivered elements equals the total arrangement consideration less the aggregate fair value of any undelivered elements. If VSOE of fair value of one or more undelivered items does not exist, revenue from the entire arrangement is deferred and recognized at the earlier of: (i) delivery of those elements or (ii) when fair value can be established unless support and maintenance is the only undelivered element, in which case, the entire arrangement fee is recognized ratably over the contractual service period.
	We provide unspecified software upgrades for most of our products, on a when-and-if available basis, through maintenance and support contracts. To the extent that the software being supported does not function together with the hardware to deliver the hardware’s essential functionality, these support arrangements would continue to be subject to the industry-specific software revenue recognition guidance.
	We allocate the arrangement fee to each element based upon the relative selling price of that element and, if software and software-related (e.g., maintenance for the software element) elements are also included in the arrangement, we allocate the arrangement fee to each of those software and software-related elements as a group based on the relative selling price for those elements. After such allocations are made, the amount of the arrangement fee allocated to the software and software-related elements is accounted for using the residual method. When applying the relative selling price method, we determine the selling price for each element using vendor-specific objective evidence, or VSOE, of selling price, if it exists, or if not, third-party evidence, or TPE, of selling price, if it exists. If neither VSOE nor TPE of selling price exist for an element, we use our best estimate of selling price, or BESP, for that element. The revenue allocated to each element is then recognized when the basic revenue recognition criteria are met for that element. We limit the amount of revenue recognized for delivered elements to an amount that is not contingent upon future delivery of additional products or services or meeting of any specified performance conditions.
	Whenever possible, we determine VSOE for each element based on historical stand-alone sales to third parties. For maintenance and support, training and consulting, and subscription services, we determine the VSOE of fair value based on our history of stand-alone sales demonstrating that a substantial majority of transactions fall within a narrow range for each service offering.
	We historically have not been able to determine TPE for our products, maintenance and support, training or consulting services. TPE is determined based on competitor prices for similar elements when sold separately. Generally, our offerings contain a significant level of differentiation such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, our go-to-market strategy differs from that of our peers and we are unable to reliably determine what similar competitor products' selling prices are on a stand-alone basis.
	When we are unable to establish the selling price of an element using VSOE or TPE, we use BESP in our allocation of consideration to various elements under the arrangement. The objective of BESP is to determine the price at which we would transact a sale if the product or service were sold on a stand-alone basis. The BESP is established based on internal and external factors, including pricing practices such as discounting, cost of products, the geographies in which we offer our products and services, and customer classes and distribution channels (e.g. distributor, value-added reseller and direct end-user). The determination of BESP is made through consultation with and approval by our management, taking into consideration our pricing model and go-to-market strategy.
	For our non-software deliverables, we generally determine relative selling price based on BESP. However, for our maintenance and support, training and consulting, and subscription services, we generally use VSOE to determine relative selling price. When we are unable to establish selling price using VSOE for our maintenance and support, training and consulting, and subscription services, we use BESP in our allocation of arrangement consideration.
	We regularly review VSOE and BESP data provided by actual transactions to update these estimates and the relative selling prices allocated to each element.
Deferred Revenue, Net	'
	Deferred Revenue, Net
	Deferred revenue, net represents amounts invoiced to customers, less related cost of revenue, for which the related revenue has not been recognized because one or more of the revenue recognition criteria have not been met. The current portion of deferred revenue represents the amounts that are expected to be recognized as revenue within one year of the consolidated balance sheet date.
Accounts Receivable and Allowance for Doubtful Accounts	'
	Accounts Receivable and Allowance for Doubtful Accounts
	Accounts receivable are recorded at invoiced amounts, net of allowances for doubtful accounts if applicable, and do not bear interest.
	We evaluate the collectability of our accounts receivable based on known collection risks and historical experience. In circumstances where we are aware of a specific customer's inability to meet its financial obligations to us (e.g., bankruptcy filings or substantial downgrading of credit ratings), we record a specific reserve for bad debts against amounts due to reduce the net recognized receivable to the amount we reasonably believe will be collected. For all other customers, we record reserves for bad debts based on the length of time the receivables are past due and our historical experience of collections and write-offs. If circumstances change, such as higher-than-expected defaults or an unexpected material adverse change in a major customer's ability to meet its financial obligations, our estimate of the recoverability of the amounts due could be reduced by a material amount.
Concentration of Revenue and Accounts Receivable	'
	Concentration of Revenue and Accounts Receivable
	Significant customers are those which represent more than 10% of our total net revenue or gross accounts receivable balance at each respective balance sheet date. Exclusive Networks, a distributor, accounted for 10.5% and 11.5% of our total net revenue for the years ended July 31, 2014 and 2013. No single end customer, distributor or channel partner accounted for more than 10% of our net revenue in 2012. As of July 31, 2014 and 2013, Exclusive Networks accounted 12.8% and11.2% of our total gross accounts receivable.
Shipping and Handling	'
	Shipping and Handling
	Shipping charges billed to customers are included in revenue and the related shipping costs are included in cost of revenue.
Research and Development Costs	'
	Research and Development Costs
	Software development costs incurred in the research and development of new products and enhancements to existing products are charged to expense as incurred. Software development costs are capitalized after technological feasibility has been established. The period between achievement of technological feasibility, which we define as the establishment of a working model, and the general availability of such software to customers has been short, resulting in software development costs qualifying for capitalization being insignificant. Accordingly, we did not capitalize any software development costs during the years ended July 31, 2014, 2013 and 2012.
Stock-Based Compensation	'
	Stock-Based Compensation
	We recognize share-based compensation expense for all share-based payment awards including employee stock options, RSUs, and purchases under our ESPP based on each award's fair value on the grant date. We utilize the BSM option pricing model in order to determine the fair value of stock options and ESPP. The BSM option pricing model requires various highly subjective assumptions including volatility, expected award life, and risk-free interest rate. Since we only have a short trading history of our common stock (approximately 30 months since our IPO), we use a blended volatility to estimate expected volatility. The blended volatility includes a weighting of our historical volatility from the date of our IPO to the respective grant date and the average historical stock volatilities of several unrelated public companies within our industry that we consider to be comparable to our business over a period equivalent to the estimated life of our stock options. The expected life of an award is based on historical experience, the terms and conditions of the stock awards granted to employees, and the potential effect from options that have not been exercised. The fair value of the RSUs is determined using the closing price of our common stock on the date of the grant. Compensation is recognized on a straight-line basis over the requisite service period of each grant adjusted for estimated forfeitures. In addition, we are required to estimate the expected forfeiture rate and only recognize expense for those shares expected to vest. We estimate the forfeiture rate based on historical experience and our expectations regarding future pre-vesting termination behavior of employees.
Warranty Costs	'
	Warranty Costs
	Our appliance hardware generally includes a one-year warranty, and our software generally carries a warranty of ninety days. Costs related to hardware replacement provided to customers under maintenance support agreements are included as services cost of revenue and recognized as these services are provided.
Advertising Costs	'
	Advertising Costs
	Advertising costs are charged to sales and marketing expenses as incurred in the consolidated statements of operations. Advertising expense during the years ended July 31, 2014, 2013 and 2012 was $1.3 million, $1.0 million and $1.1 million.
Foreign Currency	'
	Foreign Currency
	The functional currency of our foreign subsidiaries is the U.S. dollar. Transactions denominated in currencies other than the functional currency are remeasured at the average exchange rate in effect during the period. At the end of each reporting period, our subsidiaries' monetary assets and liabilities are remeasured to the functional currency using exchange rates in effect at the end of the reporting period. Non-monetary assets and liabilities are remeasured at historical exchange rates. Gains and losses related to remeasurement are recorded in other expense, net in the consolidated statements of operations. Foreign currency exchange losses included in other expense, net during the years ended July 31, 2014, 2013 and 2012 were $0.5 million, $0.8 million and $0.6 million
Income Taxes	'
	Income Taxes
	We account for income taxes under an asset and liability approach for deferred income taxes, which requires recognition of deferred income tax assets and liabilities for the expected future tax consequences of events that have been recognized in our consolidated financial statements, but have not been reflected in our taxable income. Estimates and judgments occur in the calculation of certain tax liabilities and in the determination of the recoverability of certain deferred income tax assets, which arise from temporary differences and carryforwards. Deferred income tax assets and liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in which those tax assets are expected to be realized or settled. We regularly assess the likelihood that our deferred income tax assets will be realized based on the realization guidance available. To the extent that we believe any amounts are not more-likely-than-not to be realized, we record a valuation allowance to reduce the deferred income tax assets. We regularly assess the need for the valuation allowance on our deferred tax assets, and to the extent that we determine that an adjustment is needed, such adjustment will be recorded in the period that the determination is made.
	We regularly review our tax positions and benefits to be realized. We recognize tax liabilities based upon our estimate of whether, and the extent to which, additional taxes will be due when such estimates are more-likely-than-not to be sustained. An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained. We recognize interest and penalties related to income tax matters as income tax expense. For the years ended July 31, 2014, 2013 and 2012, we did not incur any interest or penalties associated with unrecognized tax benefits.
Segment Information	'
	Segment Information
	Operating segments are components of an enterprise for which separate financial information is available and is evaluated regularly by our chief operating decision maker in deciding how to allocate resources and assessing performance. Our chief operating decision maker is our Chief Executive Officer.
	Our Chief Executive Officer reviews financial information presented on a consolidated basis, for purposes of allocating resources and evaluating financial performance. We have one business activity and there are no segment managers who are held accountable for operations, operating results beyond revenue goals or gross margins, or plans for levels or components below the consolidated unit level. Accordingly, we have a single reporting segment.
Recently Issued Accounting Pronouncements	'
	Recently Issued Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-11, Income Taxes (Topic 740), Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (“ASU 2013-11”). ASU 2013-11 provides guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, similar tax loss, or tax credit carryforward exists. This new standard requires the netting of unrecognized tax benefits (“UTBs”) against a deferred tax asset for a loss or other carryforward that would apply in settlement of the uncertain tax positions. UTBs will be netted against all available same-jurisdiction loss or other tax carryforwards that would be utilized, rather than only against carryforwards that are created by the UTBs. We adopted ASU 2013-11 during the first quarter of fiscal 2014 and the adoption did not have any impact on our consolidated financial position or results of operations.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09), which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP. The standard is effective for us beginning the first quarter of fiscal 2018, using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements and have not yet determined the method by which we will adopt the standard in fiscal 2018.

Net_Income_Loss_Per_Share_Tabl

Net Income (Loss) Per Share (Tables)	12 Months Ended
	Jul. 31, 2014
Earnings Per Share [Abstract]	'
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	'
	The following weighted-average shares of common stock equivalents were excluded from the computation of diluted net loss per share for the years presented because including them would have been antidilutive:
		Year Ended July 31,
		2014	2013	2012
		(In thousands)
	Stock options to purchase common stock	3,629	6,123	8,049
	Restricted stock units	1,745	225	3
	Employee stock purchase plan	380	110	616
	Convertible preferred stock	—	—	19,581
	Common stock warrants	—	—	246
	Convertible preferred stock warrants	—	—	41

Cash_Equivalents_and_Shortterm1

Cash Equivalents and Short-term Investments, Restricted Cash and Fair Value Measurements (Tables)	12 Months Ended
	Jul. 31, 2014										Jul. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'										'
Schedule of Available-for-sale Securities	'										'
	The following table summarizes our cash equivalents, short-term investments and restricted cash as of July 31, 2014:										The following table summarizes our cash equivalents, short-term investments and restricted cash as of July 31, 2013:
		Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value			Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
		(In thousands)										(In thousands)
	Cash equivalents:										Cash equivalents:
	Money market funds	$	7,550	$	—	$	—		$	7,550	Money market funds	$	11,133	$	—	$	—		$	11,133
	U.S. Treasury securities	2,000		—		—			2,000		Short-term investments:
											U.S. Treasury securities	99,754		12		(28		)	99,738
	Total cash equivalents	9,550		$	—	—			9,550
											U.S. government agency securities	29,525		13		(4		)	29,534
	Short-term investments:
	U.S. Treasury securities	136,729		37		(65		)	136,701		FDIC-backed certificates of deposit	10,240		6		(10		)	10,236
	U.S. government agency securities	37,433		3		(53		)	37,383		Total short-term investments	139,519		31		(42		)	139,508
	FDIC-backed certificates of deposit	17,240		4		(12		)	17,232		Restricted cash:
											U.S. Treasury securities	3,407		—		—			3,407
	Total short-term investments	191,402		44		(130		)	191,316
											Total cash equivalents, short-term investments and restricted cash	$	154,059	$	31	$	(42	)	$	154,048
	Restricted cash:
	U.S. Treasury securities	3,413		2		—			3,415
	Total cash equivalents, short-term investments and restricted cash	$	204,365	$	46	$	(130	)	$	204,281
	The following table presents the maturities of our short-term investments which are classified as available-for-sale securities as of July 31, 2014:
		Amortized Cost		Estimated Fair Value
		(In thousands)
	Due within one year	$	97,230	$	97,246
	Due after one year through two years	94,172		94,070
	Total	$	191,402	$	191,316
Fair Value Measurement	'										'
	The following table sets forth the fair value of our financial assets by level within the fair value hierarchy:
		Fair Value Measurements at July 31, 2014 Using:
		Quoted Prices in Active Markets For Identical Assets		Significant Other Observable Remaining Inputs		Significant Other Unobservable Remaining Inputs
		(Level I)		(Level II)		(Level III)			Total
		(In thousands)
	Financial Assets
	Reported as cash equivalents:
	Money market funds	$	7,550	$	—	$	—		$	7,550
	U.S. Treasury securities	2,000		—		—			2,000
	Total cash equivalents	9,550		—		—			9,550
	Reported as short-term investments:
	U.S. Treasury securities	136,701		—		—			136,701
	U.S. government agency securities	—		37,383		—			37,383
	FDIC-backed certificates of deposit	—		17,232		—			17,232
	Total short-term investments	136,701		54,615		—			191,316
	Reported as restricted cash:
	U.S. Treasury securities	3,415		—		—			3,415
	Total financial assets	$	149,666	$	54,615	$	—		$	204,281
		Fair Value Measurements at July 31, 2013 Using:
		Quoted Prices in Active Markets For Identical Assets		Significant Other Observable Remaining Inputs		Significant Other Unobservable Remaining Inputs
		(Level I)		(Level II)		(Level III)			Total
		(In thousands)
	Financial Assets
	Reported as cash equivalents:
	Money market funds	$	11,133	$	—	$	—		$	11,133
	Reported as short-term investments:
	U.S. Treasury securities	99,738		—		—			99,738
	U.S. government agency securities	—		29,534		—			29,534
	FDIC-backed certificates of deposit	—		10,236		—			10,236
	Total short-term investments	99,738		39,770		—			139,508
	Reported as restricted cash:
	U.S. Treasury securities	3,407		—		—			3,407
	Total financial assets	$	114,278	$	39,770	$	—		$	154,048

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	12 Months Ended
	Jul. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Schedule of Allowance for Doubtful Accounts and Sales Returns Reserve	'
	The allowances for doubtful accounts and sales returns consist of the following activity:
		Balance at Beginning of Year			Charged to (Reversed From) Cost and Expenses			Deductions			Balance at End of Year
		(In thousands)
	Year Ended July 31, 2012
	Allowance for doubtful accounts	$	266		$	167		$	(76	)	$	357
	Sales returns reserve	273			118			(204		)	187
	Total allowance for doubtful accounts and sales returns reserve	$	539		$	285		$	(280	)	$	544
	Year Ended July 31, 2013
	Allowance for doubtful accounts	$	357		$	177		$	(178	)	$	356
	Sales returns reserve	187			197			(159		)	225
	Total allowance for doubtful accounts and sales returns reserve	$	544		$	374		$	(337	)	$	581
	Year Ended July 31, 2014
	Allowance for doubtful accounts	$	356		$	72		$	(89	)	$	339
	Sales returns reserve	225			(73		)	(27		)	125
	Total allowance for doubtful accounts and sales returns reserve	$	581		$	(1	)	$	(116	)	$	464
Schedule of Inventory	'
	Inventory consists of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Raw materials	$	474		$	412
	Finished goods	5,871			4,066
	Total inventory	$	6,345		$	4,478
Schedule of Prepaid Expenses and Other Current Assets	'
	Prepaid expenses and other current assets consist of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Prepaid expenses	$	6,002		$	4,626
	Other current assets	1,219			1,397
	Total prepaid expenses and other current assets	$	7,221		$	6,023
Schedule of Property, Plant and Equipment	'
	Property and equipment, net consists of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Computer equipment and software	$	19,660		$	14,394
	Furniture and fixtures	4,588			4,354
	Leasehold improvements	10,604			9,948
	Total property and equipment, gross	34,852			28,696
	Less accumulated depreciation and amortization	(16,067		)	(10,326		)
	Total property and equipment, net	$	18,785		$	18,370
Schedule of Accounts Payable and Accrued Liabilities	'
	Accounts payable and accrued liabilities consist of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Accounts payable	$	8,064		$	6,295
	Accrued travel expenses	1,372			954
	Other	6,212			5,138
	Total other current liabilities	$	15,648		$	12,387
Schedule of Deferred Revenue, Net	'
	Deferred revenue, net consists of the following:
		As of July 31,
		2014			2013
		(In thousands)
	Deferred revenue:
	Products and licenses	$	5,120		$	7,791
	Services	112,642			91,453
	Total deferred revenue	117,762			99,244
	Deferred cost of revenue:
	Products and licenses	449			871
	Services	1,200			201
	Total deferred cost of revenue	1,649			1,072
	Total deferred revenue, net	116,113			98,172
	Less current portion	81,964			68,479
	Non-current portion	$	34,149		$	29,693

Other_Expense_Net_Tables

Other Expense, Net (Tables)	12 Months Ended
	Jul. 31, 2014
Other Income and Expenses [Abstract]	'
Schedule of Other Expense, Net	'
	Other expense, net is comprised of the following:
		Year Ended July 31,
		2013			2012			2011
		(In thousands)
	Interest income and other, net	$	435		$	195		$	58
	Foreign currency exchange losses	(453		)	(813		)	(613		)
	Change in fair value of convertible preferred stock warrant liability	—			—			(391		)
	Total other expense, net	$	(18	)	$	(618	)	$	(946	)

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Jul. 31, 2014
Business Combinations [Abstract]	'
Schedule of Business Acquisitions	'
	Based on the foregoing, the total purchase price of this acquisition consists of the following:
		Amount in Thousands
	Cash consideration	$	1,000
	Fair value of fully vested RSUs (1)	573
	Total consideration	$	1,573

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Jul. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill	'
	The change in the carrying amount of goodwill for the year ended July 31, 2014 was as follows:
			Amount in Thousands
	Balance as of July 31, 2013		$	32,726
	Acquisition		567
	Balance as of July 31, 2014		$	33,293
Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets	'
	The gross carrying amount and accumulated amortization of our intangible assets other than goodwill were as follows:
	As of July 31, 2014	Amortization Period		Gross Value				Accumulated Amortization				Net Carrying Value		Weighted-Average Remaining Amortization Period
				(Dollars in thousands)
	Developed technology	5 to 7  years		$	7,305			$	(4,915	)		$	2,390	3.51 years
	Customer relationships	2 to 7 years		6,574				(5,343		)		1,231		1.57 years
	Trademarks	6 years		200				(142		)		58		1.75 years
	Patents	6 years		1,000				(583		)		417		2.50 years
	Total			$	15,079			$	(10,983	)		$	4,096
	As of July 31, 2013	Amortization Period		Gross Value				Accumulated Amortization				Net Carrying Value		Weighted-Average Remaining Amortization Period
				(Dollars in thousands)
	Developed technology	5 to 6  years		$	6,290			$	(3,976	)		$	2,314	2.73 years
	Customer relationships	2 to 7 years		6,574				(4,069		)		2,505		2.26 years
	Trademarks	6 years		200				(108		)		92		2.75 years
	Patents	6 years		1,000				(417		)		583		3.50 years
	Total			$	14,064			$	(8,570	)		$	5,494
Schedule of Intangible Asset Amortization Expense, by Income Statement Location	'
	We recognized intangible asset amortization expense in the consolidated statements of operations as follows:
		Year Ended July 31,
		2014				2013				2012
		(In thousands)
	Cost of products and licenses revenue	$	1,110			$	1,015			$	1,302
	Sales and marketing	1,308				1,308				1,560
	Total intangible asset amortization expense	$	2,418			$	2,323			$	2,862
Schedule of Estimated Amortization Expense	'
	As of July 31, 2014, estimated amortization expense related to our identifiable acquisition-related intangible assets in future periods is as follows:
	Fiscal Year Ending July 31,		Estimated Amortization Expense
			(In thousands)
	2015		$	2,173
	2016		1,048
	2017		323
	2018		208
	2019		145
	Thereafter		199
	Total		$	4,096

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Jul. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Future Minimum Rental Payments	'
	The aggregate future non-cancelable minimum lease payments for our operating leases as of July 31, 2014 consist of the following:
	Fiscal Year Ending July 31,	Operating Leases
		(In thousands)
	2015	$	4,779
	2016	4,684
	2017	4,278
	2018	3,846
	2019	3,918
	2020 and Thereafter	5,828
	Total	$	27,333

Common_Stock_Reserved_for_Issu1

Common Stock Reserved for Issuance (Tables)	12 Months Ended
	Jul. 31, 2014
Equity [Abstract]	'
Schedule of Common Stock Reserved for Issuance	'
	We had reserved shares of common stock for future issuance as follows:
		As of July 31,
		2014	2013
		(In thousands)
	Outstanding stock options	4,914	6,663
	Shares reserved for future grants	4,144	4,890
	Outstanding restricted stock units	3,442	1,986
	Shares reserved for employee stock purchase plan	1,302	1,411
		13,802	14,950

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
	Jul. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Stock-based Compensation by Statement of Operations	'
	The following table summarizes the stock-based compensation expense by line item in the Consolidated Statements of Operations:
		Year Ended July 31,
		2014				2013				2012
		(In thousands)
	Cost of revenue	$	3,619			$	1,606			$	700
	Research and development	7,375				4,659				2,363
	Sales and marketing	22,919				11,721				5,409
	General and administrative	7,058				4,078				2,180
	Total stock-based compensation	$	40,971			$	22,064			$	10,652
	The following table summarizes the stock-based compensation expense by award type:
		Year Ended July 31,
		2014				2013				2012
		(In thousands)
	Stock options	$	12,252			$	10,061			$	8,249
	RSUs	24,359				6,084				13
	ESPP	4,360				5,919				2,390
	Total stock-based compensation	$	40,971			$	22,064			$	10,652
Schedule of Unrecognized Stock-Based Compensation Balance	'
	The following table summarizes the unrecognized stock-based compensation balance, net of estimated forfeitures, by type of awards as of July 31, 2014:
			As of July 31, 2014				Weighted-Average Amortization Period
			(In thousands)				(In years)
	Restricted stock units		$	63,786			2.77
	Stock options		14,657				1.95
	ESPP		8,672				1.28
	Total unrecognized stock-based compensation balance		$	87,115			2.48
Schedule of Determination of Fair Value	'
	The estimated grant date fair value of our stock options and ESPP awards was calculated using the BSM option-pricing model, based on the following assumptions:
		Year Ended July 31,
		2014				2013				2012
	Employee Stock Options:
	Expected term (in years)	6.08				6.08				6.08
	Risk-free interest rate	1.86		%		1.04		%		0.91		%
	Expected volatility	55		%		54		%		56		%
	Dividend rate	—		%		—		%		—		%
	Weighted average fair value per share	$	16.75			$	10.49			$	5.75
	ESPP:
	Expected term (in years)	0.50-2.00				0.50 - 2.00				0.67 - 2.17
	Risk-free interest rate	0.06% - 0.48%				0.09% - 0.38%				0.15% - 0.31%
	Expected volatility	55% - 77%				47% - 58%				53% - 58%
	Dividend rate	—		%		—		%		—		%
	Weighted average fair value per share	$6.12 - $12.87				$7.07 - $10.77				$	9.4
Schedule of Stock-Based Compensation Activity	'
	The following table summarizes the stock option activity and related information as of and for the three years ended July 31, 2014 under our Plans:
		Options Outstanding
		Number of Shares Underlying Outstanding Options			Weighted-Average Exercise Price				Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
		(In thousands)							(In years)		(In thousands)
	Outstanding as of July 31, 2011	9,567			$	4.46			7.63		$	50,224
	Options granted	3,274			10.84
	Options exercised	(629	)		3.58
	Options forfeited/expired	(365	)		7.89
	Outstanding as of July 31, 2012	11,847			$	6.16			7.3		$	176,037
	Options granted	841			20.62
	Options exercised	(5,320	)		4.02
	Options forfeited/expired	(705	)		9.39
	Outstanding as of July 31, 2013	6,663			$	9.35			7.47		$	155,580
	Options granted	523			31.83
	Options exercised	(2,052	)		6.74
	Options forfeited/expired	(220	)		16.17
	Outstanding as of July 31, 2014	4,914			$	12.52			6.67		$	14,980
	Vested and expected to vest - July 31, 2014	4,767			$	12.27			6.62		$	14,879
	Exercisable - July 31, 2014	2,950			$	8.81			5.77		$	12,976
Schedule of Exercise Price Range	'
	The following table summarizes information about stock options outstanding and exercisable under the Plans as of July 31, 2014:
			Options Outstanding									Options Exercisable
	Range of Exercise Price		Number of Shares			Weighted-Average		Weighted-Average Exercise Price per Share				Number of	Weighted-Average
			Underlying Outstanding Options			Remaining Contractual Life						Shares	Exercise Price per Share
												Underlying Exercisable Options
			(In thousands)			(In Years)						(In thousands)
	$0.60 - $4.53		828			3.57		$	3.2			828	$	3.2
	$6.33 - $7.08		458			5.98		$	6.42			443	$	6.4
	$9.12		894			6.72		$	9.12			493	$	9.12
	$9.33 - $9.66		629			6.12		$	9.57			478	$	9.57
	$9.78 - $11.25		598			7.5		$	10.95			303	$	10.92
	$13.37 - $17.52		578			8.22		$	15.99			164	$	16.46
	$17.89 - $22.61		493			8.28		$	20.98			200	$	20.29
	$27.57 - $33.70		246			9.05		$	30.33			32	$	30.08
	$43.09		172			8.7		$	43.09			9	$	43.09
	$44.47		18			9.19		$	44.47			—	$	—
			4,914			6.67		$	12.52			2,950	$	8.81
Schedule of Restricted Stock Units	'
	A summary of the restricted stock unit activity during the three years ended July 31, 2014 is presented below:
			Number of Units			Weighted-Average Grant Date Fair Value Per Share
			(In thousands)
	Outstanding as of July 31, 2012		36			$	18.68
	Granted		2,107			$	21.44
	Vested		(25	)		$	20.36
	Cancellations due to forfeitures		(132	)		$	19.86
	Outstanding as of July 31, 2013		1,986			$	21.15
	Granted		2,432			$	29.72
	Vested		(699	)		$	22.37
	Cancellations due to forfeitures		(277	)		$	29.9
	Outstanding as of July 31, 2014		3,442			$	26.47
Schedule of Shares Available for Grant	'
	The following table presents the stock grant activity and the total number of shares available for grant under the 2012 Plan as of July 31, 2014:
		2012 Plan
		(In thousands)
	Balance at July 31, 2013	4,890
	Additional shares authorized for issuance	1,712
	Options granted	(523	)
	RSUs granted	(2,432	)
	Options forfeited/expired(1)	220
	RSUs forfeited/expired	277
	Balance at July 31, 2014	4,144
	-1	Includes forfeited or expired options under the 2003 Plan that forfeited or expired unexercised which became available for grant under the 2012 Plan according to its terms. Any shares subject to outstanding awards under the 2003 Plan that are issuable upon the exercise of options that expire or become unexercisable for any reason without having been exercised in full will be available for future grant and issuance under the 2012 Plan.

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Jul. 31, 2014
Income Tax Disclosure [Abstract]	'
Schedule of Income before Income Tax, Domestic and International	'
	Our geographical breakdown of income (loss) before provision for income taxes for the years ended July 31, 2014, 2013 and 2012 is as follows:
		Year Ended July 31,
		2014			2013			2012
		(In thousands)
	Domestic	$	(24,964	)	$	(5,501	)	$	(9,203	)
	International	1,966			1,745			1,737
	Loss before provision for income taxes	$	(22,998	)	$	(3,756	)	$	(7,466	)
Schedule of Components of Provision for Income Taxes	'
	The components of the provision for income taxes are as follows:
		Year Ended July 31,
		2014			2013			2012
		(In thousands)
	Current:
	State	$	209		$	539		$	360
	Foreign	416			328			751
	Federal	—			—			(353		)
	Total current	625			867			758
	Deferred:
	Foreign	294			(217		)	(14		)
	Provision for income taxes	$	919		$	650		$	744
Schedule of Statutory Federal Income Tax and Effective Income Tax Rate Reconciliation	'
	The reconciliation of the statutory federal income tax and our effective income tax is as follows:
		Year Ended July 31,
		2014			2013			2012
		(In thousands)
	Tax at statutory federal rate	$	(8,049	)	$	(1,314	)	$	(2,613	)
	Stock-based compensation and other permanent items	3,696			2,765			2,710
	R&D credit	(528		)	(958		)	(382		)
	Change in valuation allowance	5,663			515			1,017
	Foreign rate differential	23			(500		)	130
	State tax—net of federal benefit	158			477			230
	Foreign tax credit	(6		)	(308		)	—
	Alternative minimum tax	—			—			(353		)
	Other	(38		)	(27		)	5
	Provision for income taxes	$	919		$	650		$	744
Schedule of Deferred Tax Assets and Liabilities	'
	The components of the deferred tax assets, net are as follows:
		As of July 31,
		2014			2013
		(In thousands)
	Deferred tax assets:
	Net operating loss carryforwards	$	13,814		$	17,499
	Deferred revenue	11,259			8,193
	Stock-based compensation	8,800			4,124
	Accruals, reserves and other	7,193			7,616
	Tax credit carryforwards	7,195			6,042
	Other fixed assets depreciation	393			—
	Gross deferred tax asset	48,654			43,474
	Valuation allowance	(48,136		)	(41,400		)
	Total deferred tax asset	518			2,074
	Deferred tax liabilities:
	Other identified intangibles	(510		)	(1,273		)
	Other fixed assets depreciation	—			(502		)
	Total deferred tax liability	(510		)	(1,775		)
	Net deferred tax assets	$	8		$	299
Schedule of Unrecognized Tax Benefits	'
	The following table summarizes the activity related to the unrecognized tax benefits:
		Year Ended July 31,
		2014			2013			2012
		(In thousands)
	Gross unrecognized tax benefits beginning balance	$	2,268		$	1,342		$	998
	Increases related to tax positions taken during current year	612			762			200
	Increases (Decreases) related to tax positions from prior years	(17		)	164			144
	Gross unrecognized tax benefits	$	2,863		$	2,268		$	1,342

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Jul. 31, 2014
Segment Reporting [Abstract]	'
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	'
	The following table represents net revenue based on the customer’s location, as determined by the customer’s shipping address:
		Year Ended July 31,
		2014		2013		2012
		(In thousands)
	Americas	$	164,323	$	147,017	$	108,660
	Europe, Middle East and Africa	58,570		54,378		40,666
	Asia Pacific	27,447		23,649		19,920
	Total net revenue	$	250,340	$	225,044	$	169,246
	Our property and equipment, net by location is summarized as follows:
		As of July 31,
		2014		2013
		(In thousands)
	Americas	$	17,882	$	17,997
	Asia Pacific	234		224
	Europe, Middle East and Africa	669		149
		$	18,785	$	18,370

Unautited_Quarterly_Financial_1

Unautited Quarterly Financial Data (Tables)	12 Months Ended
	Jul. 31, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Schedule of Quarterly Financial Data	'
	Fiscal 2014
		Three Months Ended
		October 31,			January 31,			April 30,			July 31,
		2013			2014			2014			2014
		(In thousands, except per share amounts)
	Net revenue:
	Products and licenses	$	35,962		$	31,565		$	30,799		$	32,022
	Services	27,559			29,317			30,223			32,893
	Total net revenue	63,521			60,882			61,022			64,915
	Cost of revenue:
	Products and licenses	7,887			7,086			7,119			7,235
	Services	5,821			6,633			6,665			7,352
	Total cost of revenue	13,708			13,719			13,784			14,587
	Gross profit	49,813			47,163			47,238			50,328
	Operating expenses:
	Research and development	11,600			11,844			12,175			13,670
	Sales and marketing	33,131			32,854			34,589			38,038
	General and administrative	6,986			6,848			7,839			7,948
	Total operating expenses	51,717			51,546			54,603			59,656
	Loss from operations	(1,904		)	(4,383		)	(7,365		)	(9,328		)
	Other income (expense), net	(101		)	(103		)	124			62
	Loss before provision for (benefit from) income taxes	(2,005		)	(4,486		)	(7,241		)	(9,266		)
	Provision for (benefit from) income taxes	544			(92		)	201			266
	Net loss	$	(2,549	)	$	(4,394	)	$	(7,442	)	$	(9,532	)
	Net loss per share - basic and diluted	$	(0.05	)	$	(0.08	)	$	(0.14	)	$	(0.17	)
	Fiscal 2013
		Three Months Ended
		October 31,			January 31,			April 30,			July  31,
		2012			2013			2013			2013
		(In thousands, except per share amounts)
	Net revenue:
	Products and licenses	$	27,098		$	30,807		$	33,596		$	36,702
	Services	22,407			23,632			24,439			26,363
	Total net revenue	49,505			54,439			58,035			63,065
	Cost of revenue:
	Products and licenses	5,840			7,100			7,786			8,502
	Services	4,249			4,542			4,910			5,324
	Total cost of revenue	10,089			11,642			12,696			13,826
	Gross profit	39,416			42,797			45,339			49,239
	Operating expenses:
	Research and development	10,214			10,593			10,976			11,273
	Sales and marketing	25,631			29,108			28,138			29,508
	General and administrative	5,658			5,493			6,195			7,142
	Total operating expenses	41,503			45,194			45,309			47,923
	Loss from operations	(2,087		)	(2,397		)	30			1,316
	Other expense, net	(106		)	(220		)	(45		)	(247		)
	Loss before provision for (benefit from) income taxes	(2,193		)	(2,617		)	(15		)	1,069
	Provision for (benefit from) income taxes	197			629			242			(418		)
	Net loss	$	(2,390	)	$	(3,246	)	$	(257	)	$	1,487
	Net loss per share - basic and diluted	$	(0.05	)	$	(0.07	)	$	(0.01	)	$	0.03

Description_of_the_Business_an2

Description of the Business and Summary of Significant Accounting Policies (Details) (USD $)

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

Jul. 31, 2014

Jul. 31, 2013

Jul. 31, 2012

Jul. 31, 2014

Jul. 31, 2013

Apr. 25, 2012

Oct. 11, 2012

Jul. 31, 2014

Jul. 31, 2014

Jul. 31, 2013

Jul. 31, 2012

Jul. 31, 2014

Jul. 31, 2013

Jul. 31, 2012

Apr. 25, 2012

Apr. 25, 2012

Apr. 25, 2012

Jul. 31, 2012

Jul. 31, 2014

Jul. 31, 2013

Jul. 31, 2014

Jul. 31, 2013

customer

Letter of Credit [Member]

Letter of Credit [Member]

IPO [Member]

Secondary Offering [Member]

General and Administrative [Member]

Selling and Marketing [Member]

Selling and Marketing [Member]

Selling and Marketing [Member]

Foreign currency exchange loss [Member]

Foreign currency exchange loss [Member]

Foreign currency exchange loss [Member]

Overallotment Option, Underwriters [Member]

Underwriter Discount [Member]

Commission and Offering Expenses [Member]

Non-cancelable Purchase Commitments [Member]

Exclusive Networks [Member]

Exclusive Networks [Member]

Exclusive Networks [Member]

Exclusive Networks [Member]

Secondary Offering [Member]

IPO [Member]

IPO [Member]

IPO [Member]

Sales Revenue, Net [Member]

Sales Revenue, Net [Member]

Accounts Receivable [Member]

Accounts Receivable [Member]

Business

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total common stock sold for initial public offering (in shares)

'

'

'

'

'

6,869,343

'

'

'

'

'

'

'

'

1,125,000

'

'

'

'

'

'

'

Common stock sold by selling stockholders (in shares)

'

'

'

'

'

1,755,657

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Public offering share price (in dollars per share)

'

'

'

'

'

$16

$20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate offering price

'

'

'

'

'

$109,900,000

$96,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net proceeds from initial public offering

'

'

'

'

'

98,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commissions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,700,000

4,000,000

'

'

'

'

'

Shares issued upon conversion

'

'

'

'

'

26,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options declined

'

'

'

'

'

'

800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock issuance costs

'

'

'

'

'

'

'

800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reverse Stock Split

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reverse stock split

0.3333

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted Cash

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted cash

'

'

'

3,500,000

4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventory

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventory write-down

1,300,000

1,100,000

600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

400,000

'

'

'

'

Concentration of Revenue and Accounts Receivable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of accounts receivable by major customer

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10.50%

11.50%

12.80%

11.20%

Number of major customers

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Advertising Costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Advertising expense

'

'

'

'

'

'

'

'

1,300,000

1,000,000

1,100,000

'

'

'

'

'

'

'

'

'

'

'

Foreign Currency

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Foreign currency exchange losses

'

'

'

'

'

'

'

'

'

'

'

$453,000

$813,000

$613,000

'

'

'

'

'

'

'

'

Net_Income_Loss_Per_Share_Sche

Net Income (Loss) Per Share (Schedule of Antidilutive Securities) (Details)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Stock Option [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities excluded from computation of earnings per share	3,629	6,123	8,049
Restricted Stock Units (RSUs) [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities excluded from computation of earnings per share	1,745	225	3
Convertible Preferred Stock [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities excluded from computation of earnings per share	0	0	19,581
Warrants [Member] | Convertible Preferred Stock [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities excluded from computation of earnings per share	0	0	41
Warrants [Member] | Common Stock [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities excluded from computation of earnings per share	0	0	246
Employee Stock Purchase Plan [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities excluded from computation of earnings per share	380	110	616

Cash_Equivalents_and_Shortterm2

Cash Equivalents and Short-term Investments, Restricted Cash and Fair Value Measurements (Cash Equivalents, Short-term Investments and Restricted Cash) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Cash Equivalents, Amortized Cost Basis	$9,550	'
Cash Equivalents, Gross Unrealized Gains	0	'
Cash Equivalents, Gross Unrealized Losses	0	'
Cash Equivalents, Fair Value Disclosure	9,550	'
Available-for-sale Securities, Amortized Cost Basis	191,402	139,519
Available-for-sale Securities, Accumulated Gross Unrealized Gain	44	31
Available-for-sale Securities, Accumulated Gross Unrealized Loss	-130	-42
Available-for-sale Securities	191,316	139,508
Cash Equivalents, Available-for-sale Securities and Restricted Cash, Amortized Cost Basis	204,365	154,059
Cash Equivalents, Available-for-sale Securities and Restricted Cash, Gross Unrealized Gains	46	31
Cash Equivalents, Available-for-sale Securities and Restricted Cash, Gross Unrealized Losses	-130	-42
Cash Equivalents, Available-for-sale Securities and Restricted Cash, Fair Value Disclosure	204,281	154,048
US Treasury Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cash Equivalents, Amortized Cost Basis	2,000	'
Cash Equivalents, Gross Unrealized Gains	0	'
Cash Equivalents, Gross Unrealized Losses	0	'
Cash Equivalents, Fair Value Disclosure	2,000	'
Available-for-sale Securities, Amortized Cost Basis	136,729	'
Available-for-sale Securities, Accumulated Gross Unrealized Gain	37	'
Available-for-sale Securities, Accumulated Gross Unrealized Loss	-65	'
Available-for-sale Securities	136,701	99,738
Restricted Cash, Amortized Costs Basis	3,413	'
Restricted Cash, Gross Unrealized Gains	2	'
Restricted Cash, Gross Unrealized Losses	0	'
Restricted cash	3,415	3,407
US Government Agencies Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	37,433	'
Available-for-sale Securities, Accumulated Gross Unrealized Gain	3	'
Available-for-sale Securities, Accumulated Gross Unrealized Loss	-53	'
Available-for-sale Securities	37,383	29,534
Certificates of Deposit [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	17,240	'
Available-for-sale Securities, Accumulated Gross Unrealized Gain	4	'
Available-for-sale Securities, Accumulated Gross Unrealized Loss	-12	'
Available-for-sale Securities	17,232	10,236
Money Market Funds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cash Equivalents, Amortized Cost Basis	7,550	'
Cash Equivalents, Gross Unrealized Gains	0	'
Cash Equivalents, Gross Unrealized Losses	0	'
Cash Equivalents, Fair Value Disclosure	$7,550	$11,133

Cash_Equivalents_and_Shortterm3

Cash Equivalents and Short-term Investments, Restricted Cash and Fair Value Measurements (Maturities of Short-term Investments) (Details) (USD $)	Jul. 31, 2014
In Thousands, unless otherwise specified
Investments, Debt and Equity Securities [Abstract]	'
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$97,230
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	97,246
Available-for-sale Securities, Debt Maturities, Year One Through Two, Amortized Cost Basis	94,172
Available-for-sale Securities, Debt Maturities, Year One Through Two, Fair Value	94,070
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	191,402
Available-for-sale Securities, Debt Securities	$191,316

Cash_Equivalents_and_Shortterm4

Cash Equivalents and Short-term Investments, Restricted Cash and Fair Value Measurements (Schedule of the Fair Value of Assets and Liabilities by Level) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	$191,316	$139,508
Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	9,550	'
Available-for-sale Securities	136,701	99,738
Total financial assets	149,666	114,278
Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	0	'
Available-for-sale Securities	54,615	39,770
Total financial assets	54,615	39,770
Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	0	'
Available-for-sale Securities	0	0
Total financial assets	0	0
Total [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	9,550	'
Available-for-sale Securities	191,316	139,508
Total financial assets	204,281	154,048
US Treasury Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	136,701	99,738
Restricted cash	3,415	3,407
US Treasury Securities [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	2,000	'
Available-for-sale Securities	136,701	99,738
Restricted cash	3,415	3,407
US Treasury Securities [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	0	'
Available-for-sale Securities	0	0
US Treasury Securities [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	0	'
Available-for-sale Securities	0	0
US Treasury Securities [Member] | Total [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	2,000	'
Available-for-sale Securities	136,701	99,738
Restricted cash	3,415	3,407
US Government Agencies Debt Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	37,383	29,534
US Government Agencies Debt Securities [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
US Government Agencies Debt Securities [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	37,383	29,534
US Government Agencies Debt Securities [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
US Government Agencies Debt Securities [Member] | Total [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	37,383	29,534
Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	17,232	10,236
Certificates of Deposit [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
Certificates of Deposit [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	17,232	10,236
Certificates of Deposit [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
Certificates of Deposit [Member] | Total [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities	17,232	10,236
Money Market Funds [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	7,550	11,133
Money Market Funds [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	0	'
Money Market Funds [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	0	'
Money Market Funds [Member] | Total [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and Cash Equivalents	$7,550	$11,133

Balance_Sheet_Components_Sched

Balance Sheet Components (Schedule of Allowance for Doubtful Accounts and Sales Reserves) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Valuation Allowances and Reserves [Roll Forward]	'	'	'
Balance at Beginning of Year	$581	$544	$539
Charged to (Reversed From) Cost and Expenses	-1	374	285
Deductions	-116	-337	-280
Balance at End of Year	464	581	544
Allowance for doubtful accounts [Member]	'	'	'
Valuation Allowances and Reserves [Roll Forward]	'	'	'
Balance at Beginning of Year	356	357	266
Charged to (Reversed From) Cost and Expenses	72	177	167
Deductions	-89	-178	-76
Balance at End of Year	339	356	357
Sales returns reserve [Member]	'	'	'
Valuation Allowances and Reserves [Roll Forward]	'	'	'
Balance at Beginning of Year	225	187	273
Charged to (Reversed From) Cost and Expenses	-73	197	118
Deductions	-27	-159	-204
Balance at End of Year	$125	$225	$187

Balance_Sheet_Components_Sched1

Balance Sheet Components (Schedule of Inventory) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'
Raw materials	$474	$412
Finished goods	5,871	4,066
Total inventory	$6,345	$4,478

Balance_Sheet_Components_Sched2

Balance Sheet Components (Schedule of Prepaid Expenses and Other Current Assets) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'
Prepaid expenses	$6,002	$4,626
Other current assets	1,219	1,397
Total prepaid expenses and other current assets	$7,221	$6,023

Balance_Sheet_Components_Sched3

Balance Sheet Components (Schedule of Property, Plant and Equipment) (Details) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	$34,852,000	$28,696,000	'
Less accumulated depreciation and amortization	-16,067,000	-10,326,000	'
Total property and equipment, net	18,785,000	18,370,000	'
Depreciation and amortization	6,300,000	4,300,000	2,900,000
Computer equipment and software [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	19,660,000	14,394,000	'
Furniture and fixtures [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	4,588,000	4,354,000	'
Leasehold improvements [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total property and equipment, gross	$10,604,000	$9,948,000	'

Balance_Sheet_Components_Sched4

Balance Sheet Components (Schedule of Accounts Payable and Accrued Liabilities) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'
Accounts payable	$8,064	$6,295
Accrued travel expenses	1,372	954
Other	6,212	5,138
Total other current liabilities	$15,648	$12,387

Balance_Sheet_Components_Sched5

Balance Sheet Components (Schedule of Deferred Revenue) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	$117,762	$99,244
Deferred cost of revenue	1,649	1,072
Total deferred revenue, net	116,113	98,172
Less current portion	81,964	68,479
Non-current portion of deferred revenue	34,149	29,693
Products and Licenses [Member]	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	5,120	7,791
Deferred cost of revenue	449	871
Services [Member]	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	112,642	91,453
Deferred cost of revenue	$1,200	$201

Other_Expense_Net_Details

Other Expense, Net (Details) (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
Component of Other Income (Expense) [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Interest income and other, net	'	'	'	'	'	'	'	'	$435	$195	$58
Other income (expense), net	62	124	-103	-101	-247	-45	-220	-106	-18	-618	-946
Foreign currency exchange loss [Member]	'	'	'	'	'	'	'	'	'	'	'
Component of Other Income (Expense) [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total other income (expense), net	'	'	'	'	'	'	'	'	-453	-813	-613
Change in the Fair Value of Convertible Preferred Stock Warrant Liability [Member]	'	'	'	'	'	'	'	'	'	'	'
Component of Other Income (Expense) [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total other income (expense), net	'	'	'	'	'	'	'	'	$0	$0	($391)

Acquisitions_Details

Acquisitions (Details) (USD $)	12 Months Ended			0 Months Ended	12 Months Ended	0 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Dec. 20, 2013	Jul. 31, 2014	Dec. 20, 2013	Dec. 20, 2013
				Internet Associates LLC [Member]	Internet Associates LLC [Member]	Internet Associates LLC [Member]	Restricted Stock Units (RSUs) [Member]
				offer		Developed Technology [Member]	Internet Associates LLC [Member]
							installment
Business Acquisition [Line Items]	'	'	'	'	'	'	'
Cash consideration	'	'	'	$1,000,000	'	'	'
Number of employment offers	'	'	'	4	'	'	'
Shares granted	'	'	'	'	'	'	70,000
Vesting percentage	'	'	'	'	'	'	25.00%
Shares vested	'	'	'	'	'	'	17,499
Remaining shares	'	'	'	'	'	'	52,501
Number of installments	'	'	'	'	'	'	4
Vesting period	'	'	'	'	'	'	'2 years
Fair value of fully vested RSUs	573,000	0	0	573,000	'	'	'
Total consideration	'	'	'	1,573,000	'	'	'
Share Price	'	'	'	$32.73	'	'	'
Other intangible assets	'	'	'	'	'	1,000,000	'
Acquisition	'	'	'	$600,000	$567,000	'	'
Useful life	'	'	'	'	'	'7 years	'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Goodwill) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013	Dec. 20, 2013	Jul. 31, 2014
In Thousands, unless otherwise specified			Internet Associates LLC [Member]	Internet Associates LLC [Member]
Goodwill [Line Items]	'	'	'	'
Goodwill	$33,293	$32,726	'	'
Acquisition	'	'	600	567
Goodwill	$33,293	$32,726	'	'

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets (Gross Carrying Amount and Accumulated Amortization) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Finite-Lived Intangible Assets [Line Items]	'	'
Gross value	15,079	14,064
Accumulated amortization	-10,983	-8,570
Net carrying value	4,096	5,494
Developed Technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross value	7,305	6,290
Accumulated amortization	-4,915	-3,976
Net carrying value	2,390	2,314
Developed Technology [Member] | Weighted Average [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'3 years 6 months 3 days	'2 years 8 months 23 days
Developed Technology [Member] | Minimum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'5 years	'5 years
Developed Technology [Member] | Maximum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'7 years	'6 years
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross value	6,574	6,574
Accumulated amortization	-5,343	-4,069
Net carrying value	1,231	2,505
Customer Relationships [Member] | Weighted Average [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'1 year 6 months 25 days	'2 years 3 months 3 days
Customer Relationships [Member] | Minimum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'2 years	'2 years
Customer Relationships [Member] | Maximum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'7 years	'7 years
Trademarks [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'6 years	'6 years
Gross value	200	200
Accumulated amortization	-142	-108
Net carrying value	58	92
Trademarks [Member] | Weighted Average [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'1 year 9 months	'2 years 9 months
Patents [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'6 years	'6 years
Gross value	1,000	1,000
Accumulated amortization	-583	-417
Net carrying value	417	583
Patents [Member] | Weighted Average [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization period	'2 years 6 months	'3 years 6 months

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets (Amortization Expense) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Finite-Lived Intangible Assets [Line Items]	'	'	'
Amortization expense	$2,418	$2,323	$2,862
Cost of Products and Licenses Revenue [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Amortization expense	1,110	1,015	1,302
Sales and Marketing [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Amortization expense	$1,308	$1,308	$1,560

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets (Estimated Amortization Expense) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
2016	$2,173	'
2016	1,048	'
2017	323	'
2018	208	'
2019	145	'
Thereafter	199	'
Net carrying value	$4,096	$5,494

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	1 Months Ended	12 Months Ended
	Feb. 28, 2013	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
		sqft
Operating Leases	'	'	'	'
2015	'	$4,779,000	'	'
2016	'	4,684,000	'	'
2017	'	4,278,000	'	'
2018	'	3,846,000	'	'
2019	'	3,918,000	'	'
2020 and Thereafter	'	5,828,000	'	'
Total	'	27,333,000	'	'
Rent expense	'	4,700,000	4,600,000	2,000,000
Area in lease agreement (in square feet)	'	127,000	'	'
Term of contract	'8 years	'	'	'
Lessor leasehold incentives	'	6,000,000	'	'
Unamortized lease incentive from lessor	'	4,600,000	'	'
Letter of Credit [Member]	'	'	'	'
Operating Leases	'	'	'	'
Standby letter of credit	3,200,000	'	'	'
Minimum [Member]	'	'	'	'
Operating Leases	'	'	'	'
Rent expense, minimum rentals	'	3,200,000	'	'
Maximum [Member]	'	'	'	'
Operating Leases	'	'	'	'
Rent expense, minimum rentals	'	3,900,000	'	'
Other Noncurrent Liabilities [Member]	'	'	'	'
Operating Leases	'	'	'	'
Unamortized lease incentive from lessor	'	3,900,000	'	'
Accounts Payable and Other Current Liabilities [Member]	'	'	'	'
Operating Leases	'	'	'	'
Unamortized lease incentive from lessor	'	$700,000	'	'

Commitments_and_Contingencies_2

Commitments and Contingencies (Contract Manufacturer Commitments and Guarantees) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jul. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Open purchase orders	$6.90
Useful life	'5 years

Common_Stock_Reserved_for_Issu2

Common Stock Reserved for Issuance (Details)	Jul. 31, 2014	Jul. 31, 2013
Class of Stock [Line Items]	'	'
Capital shares reserved for future issuance	13,802,000	14,950,000
Stock Option [Member]	'	'
Class of Stock [Line Items]	'	'
Capital shares reserved for future issuance	4,914,000	6,663,000
Employee Stock Purchase Plan [Member]	'	'
Class of Stock [Line Items]	'	'
Shares reserved for employee stock purchase plan	1,302,000	1,411,000
Restricted Stock Units (RSUs) [Member]	'	'
Class of Stock [Line Items]	'	'
Capital shares reserved for future issuance	3,442,000	1,986,000
Equity Plan [Member]	'	'
Class of Stock [Line Items]	'	'
Capital shares reserved for future issuance	4,144,000	4,890,000

Employee_Benefit_Plans_Shareba

Employee Benefit Plans (Share-based Compensation Plans) (Details)	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2014
			2012 Plan [Member]	Equity Plan [Member]	Equity Plan [Member]	Nonstatutory Stock Option [Member]	Potential Scenario, One [Member]
						2012 Plan [Member]	2012 Plan [Member]
						Minimum [Member]	Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'
Discount from market price, offering date	'	'	'	'	'	85.00%	'
Percentage of Stock Ownership	'	'	'	'	'	'	10.00%
Fair Value of Common Stock on Grant Date	'	'	'	'	'	'	110.00%
Expiration Period	'	'	'10 years	'	'	'	'
Capital shares reserved for future issuance	13,802,000	14,950,000	'	4,144,000	4,890,000	'	'

Employee_Benefit_Plans_Employe

Employee Benefit Plans (Employee Stock Purchase Plan) (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation expense	$40,971	$22,064	$10,652
Total unrecognized stock-based compensation balance	87,115	'	'
Total unrecognized stock-based compensation balance, Weighted-average amortization	'2 years 5 months 23 days	'	'
Stock Option [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation expense	12,252	10,061	8,249
Total unrecognized stock-based compensation balance	14,657	'	'
Total unrecognized stock-based compensation balance, Weighted-average amortization	'1 year 11 months 12 days	'	'
Restricted Stock Units (RSUs) [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation expense	24,359	6,084	13
Total unrecognized stock-based compensation balance	63,786	'	'
Total unrecognized stock-based compensation balance, Weighted-average amortization	'2 years 9 months 7 days	'	'
Employee Stock Purchase Plan [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Percent of eligible compensation	15.00%	'	'
Offering period	'24 months	'	'
Purchase periods	4	'	'
Discount from market price, offering date	85.00%	'	'
Discount from market price, purchase date	85.00%	'	'
Share Price	$12.70	$13.80	'
Shares reserved for employee stock purchase plan	1,302,000	1,411,000	'
Total stock-based compensation expense	4,360	5,919	2,390
Total unrecognized stock-based compensation balance	8,672	'	'
Total unrecognized stock-based compensation balance, Weighted-average amortization	'1 year 3 months 10 days	'	'
Cost of Revenue [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation expense	3,619	1,606	700
Research and Development [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation expense	7,375	4,659	2,363
Selling and Marketing [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation expense	22,919	11,721	5,409
General and Administrative [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation expense	$7,058	$4,078	$2,180

Employee_Benefit_Plans_Determi

Employee Benefit Plans (Determination of Fair Value) (Details) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term (in years)	'6 years 0 months 29 days	'6 years 0 months 29 days	'6 years 0 months 29 days
Risk free interest rate	1.86%	1.04%	0.91%
Expected volatility	55.00%	54.00%	56.00%
Dividend rate	0.00%	0.00%	0.00%
Weighted average fair value per share	$16.75	$10.49	$5.75
Employee Stock Purchase Plan [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Dividend rate	0.00%	0.00%	0.00%
Weighted average fair value per share	'	'	$9.40
Employee Stock Purchase Plan [Member] | Minimum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term (in years)	'6 months	'6 months	'8 months 1 day
Risk free interest rate	0.06%	0.09%	0.15%
Expected volatility	55.00%	47.00%	53.00%
Weighted average fair value per share	$6.12	$7.07	'
Employee Stock Purchase Plan [Member] | Maximum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term (in years)	'2 years	'2 years	'2 years 2 months 1 day
Risk free interest rate	0.48%	0.38%	0.31%
Expected volatility	77.00%	58.00%	58.00%
Weighted average fair value per share	$12.87	$10.77	'

Employee_Benefit_Plans_Stock_O

Employee Benefit Plans (Stock Option Activities) (Details) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Number of Shares Underlying Outstanding Options [Roll Forward]	'	'	'	'
Number of Shares Underlying Outstanding Options, Beginning Balance	6,663,000	11,847,000	9,567,000	'
Number of Shares Underlying Outstanding Options, Granted	523,000	841,000	3,274,000	'
Number of Shares Underlying Outstanding Options, Exercised	-2,052,000	-5,320,000	-629,000	'
Number of Shares Underlying Outstanding Options, Forfeited/Expired	-220,000	-705,000	-365,000	'
Number of Shares Underlying Outstanding Options, Ending Balance	4,914,000	6,663,000	11,847,000	9,567,000
Number of Shares Underlying Outstanding Options, Vested and Expected to Vest	4,767,000	'	'	'
Number of Shares Underlying Outstanding Options, Exercisable	2,950,000	'	'	'
Weighted Average Exercise Price [Roll Forward]	'	'	'	'
Weighted Average Exercise Price, Beginning Balance	$9.35	$6.16	$4.46	'
Weighted Average Exercise Price, Granted	$31.83	$20.62	$10.84	'
Weighted Average Exercise Price, Exercised	$6.74	$4.02	$3.58	'
Weighted Average Exercise Price, Forfeited/Expired	$16.17	$9.39	$7.89	'
Weighted Average Exercise Price, Ending Balance	$12.52	$9.35	$6.16	$4.46
Weighted-Average Exercise Price, Vested and Expected to Vest	$12.27	'	'	'
Weighted-Average Exercise Price, Exercisable	$8.81	'	'	'
Weighted Average Remaining Contractual Term [Abstract]	'	'	'	'
Weighted Average Remaining Contractual Term	'6 years 8 months 1 day	'7 years 5 months 19 days	'7 years 3 months 18 days	'7 years 7 months 17 days
Weighted-Average Remaining Contractual Term, Vested and Expected to Vest	'6 years 7 months 13 days	'	'	'
Weighted-Average Remaining Contractual Term, Exercisable	'5 years 9 months 7 days	'	'	'
Aggregate Intrinsic Value [Abstract]	'	'	'	'
Aggregate Intrinsic Value, Outstanding	$14,980,000	$155,580,000	$176,037,000	$50,224,000
Aggregate Intrinsic Value, Vested and Expected to Vest	14,879,000	'	'	'
Aggregate Intrinsic Value, Exercisable	12,976,000	'	'	'
Pre-tax intrinsic value of options exercised	57,000,000	93,600,000	5,900,000	'
Grant date fair value	$12,700,000	$10,200,000	$6,700,000	'

Employee_Benefit_Plans_Stock_O1

Employee Benefit Plans (Stock Option Activities, Exercise Price Range) (Details) (USD $)	12 Months Ended
	Jul. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	4,914
Weighted-Average Remaining Contractual Life (in Years)	'6 years 8 months 1 day
Weighted-Average Exercise Price per Share, Outstanding	$12.52
Number of Shares Underlying Exercisable Options	2,950
Weighted-Average Exercise Price per Share, Exercisable	$8.81
$0.60 - $4.53	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	828
Weighted-Average Remaining Contractual Life (in Years)	'3 years 6 months 25 days
Weighted-Average Exercise Price per Share, Outstanding	$3.20
Number of Shares Underlying Exercisable Options	828
Weighted-Average Exercise Price per Share, Exercisable	$3.20
$0.60 - $4.53 | Minimum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Lower Range Limit	$0.60
$0.60 - $4.53 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$4.53
$6.33 - $7.08	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	458
Weighted-Average Remaining Contractual Life (in Years)	'5 years 11 months 23 days
Weighted-Average Exercise Price per Share, Outstanding	$6.42
Number of Shares Underlying Exercisable Options	443
Weighted-Average Exercise Price per Share, Exercisable	$6.40
$6.33 - $7.08 | Minimum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Lower Range Limit	$6.33
$6.33 - $7.08 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$7.08
$9.12	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	894
Weighted-Average Remaining Contractual Life (in Years)	'6 years 8 months 19 days
Weighted-Average Exercise Price per Share, Outstanding	$9.12
Number of Shares Underlying Exercisable Options	493
Weighted-Average Exercise Price per Share, Exercisable	$9.12
$9.12 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$9.12
$9.33 - $9.66	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	629
Weighted-Average Remaining Contractual Life (in Years)	'6 years 1 month 13 days
Weighted-Average Exercise Price per Share, Outstanding	$9.57
Number of Shares Underlying Exercisable Options	478
Weighted-Average Exercise Price per Share, Exercisable	$9.57
$9.33 - $9.66 | Minimum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$9.33
$9.33 - $9.66 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$9.66
$9.78 - $11.25	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	598
Weighted-Average Remaining Contractual Life (in Years)	'7 years 6 months
Weighted-Average Exercise Price per Share, Outstanding	$10.95
Number of Shares Underlying Exercisable Options	303
Weighted-Average Exercise Price per Share, Exercisable	$10.92
$9.78 - $11.25 | Minimum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$9.78
$9.78 - $11.25 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$11.25
$13.37 - $17.52	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	578
Weighted-Average Remaining Contractual Life (in Years)	'8 years 2 months 19 days
Weighted-Average Exercise Price per Share, Outstanding	$15.99
Number of Shares Underlying Exercisable Options	164
Weighted-Average Exercise Price per Share, Exercisable	$16.46
$13.37 - $17.52 | Minimum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$13.37
$13.37 - $17.52 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$17.52
$17.89 - $22.61	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	493
Weighted-Average Remaining Contractual Life (in Years)	'8 years 3 months 10 days
Weighted-Average Exercise Price per Share, Outstanding	$20.98
Number of Shares Underlying Exercisable Options	200
Weighted-Average Exercise Price per Share, Exercisable	$20.29
$17.89 - $22.61 | Minimum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Lower Range Limit	$17.89
$17.89 - $22.61 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$22.61
$27.57 - $33.70	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	246
Weighted-Average Remaining Contractual Life (in Years)	'9 years 0 months 18 days
Weighted-Average Exercise Price per Share, Outstanding	$30.33
Number of Shares Underlying Exercisable Options	32
Weighted-Average Exercise Price per Share, Exercisable	$30.08
$27.57 - $33.70 | Minimum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$27.57
$27.57 - $33.70 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$33.70
$43.09	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	172
Weighted-Average Remaining Contractual Life (in Years)	'8 years 8 months 12 days
Weighted-Average Exercise Price per Share, Outstanding	$43.09
Number of Shares Underlying Exercisable Options	9
Weighted-Average Exercise Price per Share, Exercisable	$43.09
$43.09 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$43.09
$44.47	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number of Shares Underlying Outstanding Options	18
Weighted-Average Remaining Contractual Life (in Years)	'9 years 2 months 8 days
Weighted-Average Exercise Price per Share, Outstanding	$44.47
Number of Shares Underlying Exercisable Options	0
Weighted-Average Exercise Price per Share, Exercisable	$0
$44.47 | Maximum [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price Range, Upper Range Limit	$44.47

Employee_Benefit_Plans_Restric

Employee Benefit Plans (Restricted Stock Units Activities) (Details) (Restricted Stock Units (RSUs) [Member], USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Restricted Stock Units (RSUs) [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Award Vesting Period	'4 years	'
Number of Units, Oustanding beginning balance	1,986,000	36,000
Number of Units, Granted	2,432,000	2,107,000
Number of Units, Vested	-699,000	-25,000
Number of Units, Cancellations due to forfeitures	-277,000	-132,000
Number of Units, Oustanding ending balance	3,442,000	1,986,000
Weighted Average Grant Date Fair Value, Outstanding beginning balance	$21.15	$18.68
Weighted Average Grant Date Fair Value, Granted	$29.72	$21.44
Weighted Average Grant Date Fair Value, Vested	$22.37	$20.36
Weighted Average Grant Date Fair Value, Cancellations due to forfeitures	$29.90	$19.86
Weighted Average Grant Date Fair Value, Outstanding ending balance	$26.47	$21.15

Employee_Benefit_Plans_Shares_

Employee Benefit Plans (Shares Available for Grant) (Details)	12 Months Ended
	Jul. 31, 2014		Jul. 31, 2013	Jul. 31, 2012
Shares Available for Grant [Roll Forward]	'		'	'
Options granted	-523,000		-841,000	-3,274,000
Options forfeited/expired	220,000		705,000	365,000
Restricted Stock Units (RSUs) [Member]	'		'	'
Shares Available for Grant [Roll Forward]	'		'	'
RSUs granted	-2,432,000		-2,107,000	'
2012 Plan [Member]	'		'	'
Shares Available for Grant [Roll Forward]	'		'	'
Additional shares authorized for issuance	1,712,000		'	'
Shares available for grant, ending balance	4,144,000		4,890,000	'
2012 Plan [Member] | Stock Option [Member]	'		'	'
Shares Available for Grant [Roll Forward]	'		'	'
Options granted	-523,000		'	'
Options forfeited/expired	220,000	[1]	'	'
2012 Plan [Member] | Restricted Stock Units (RSUs) [Member]	'		'	'
Shares Available for Grant [Roll Forward]	'		'	'
RSUs granted	-2,432,000		'	'
[1]	Includes forfeited or expired options under the 2003 Plan that forfeited or expired unexercised which became available for grant under the 2012 Plan according to its terms. Any shares subject to outstanding awards under the 2003 Plan that are issuable upon the exercise of options that expire or become unexercisable for any reason without having been exercised in full will be available for future grant and issuance under the 2012 Plan.

Employee_Benefit_Plans_Employe1

Employee Benefit Plans (Employee 401(k)) Plan (Details) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Younger than 50 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Maximum annual contribution	$17,500	$17,500	$17,000
50 or Older [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Maximum annual contribution	$23,000	$23,000	'

Income_Taxes_Geographical_Brea

Income Taxes (Geographical Breakdown of Income) (Details) (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
Income Tax Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Domestic	'	'	'	'	'	'	'	'	($24,964)	($5,501)	($9,203)
International	'	'	'	'	'	'	'	'	1,966	1,745	1,737
Loss before provision for income taxes	($9,266)	($7,241)	($4,486)	($2,005)	$1,069	($15)	($2,617)	($2,193)	($22,998)	($3,756)	($7,466)

Income_Taxes_Provision_for_Inc

Income Taxes (Provision for Income Taxes) (Details) (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
Current:	'	'	'	'	'	'	'	'	'	'	'
State	'	'	'	'	'	'	'	'	$209	$539	$360
Foreign	'	'	'	'	'	'	'	'	416	328	751
Federal	'	'	'	'	'	'	'	'	0	0	-353
Total current	'	'	'	'	'	'	'	'	625	867	758
Deferred:	'	'	'	'	'	'	'	'	'	'	'
Foreign	'	'	'	'	'	'	'	'	294	-217	-14
Provision for income taxes	$266	$201	($92)	$544	($418)	$242	$629	$197	$919	$650	$744

Income_Taxes_Tax_Reconciliatio

Income Taxes (Tax Reconciliation) (Details) (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
Income Tax Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Tax at statutory federal rate	'	'	'	'	'	'	'	'	($8,049)	($1,314)	($2,613)
Stock-based compensation and other permanent items	'	'	'	'	'	'	'	'	3,696	2,765	2,710
R&D credit	'	'	'	'	'	'	'	'	-528	-958	-382
Change in valuation allowance	'	'	'	'	'	'	'	'	5,663	515	1,017
Foreign rate differential	'	'	'	'	'	'	'	'	23	-500	130
State tax—net of federal benefit	'	'	'	'	'	'	'	'	158	477	230
Foreign tax credit	'	'	'	'	'	'	'	'	-6	-308	0
Alternative minimum tax	'	'	'	'	'	'	'	'	0	0	-353
Other	'	'	'	'	'	'	'	'	-38	-27	5
Provision for income taxes	$266	$201	($92)	$544	($418)	$242	$629	$197	$919	$650	$744

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 operating loss carryforwards	$13,814	$17,499
Deferred revenue	11,259	8,193
Stock-based compensation	8,800	4,124
Accruals, reserves and other	7,193	7,616
Tax credit carryforwards	7,195	6,042
Other fixed assets depreciation	393	0
Gross deferred tax asset	48,654	43,474
Valuation allowance	-48,136	-41,400
Total deferred tax asset	518	2,074
Deferred tax liabilities:	'	'
Other identified intangibles	-510	-1,273
Other fixed assets depreciation	0	-502
Total deferred tax liability	-510	-1,775
Net deferred tax assets	$8	$299

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Operating Loss Carryforwards [Line Items]	'	'	'	'
Valuation allowance	$48,136,000	$41,400,000	'	'
Valuation allowance increase	-6,700,000	'	'	'
Operating loss	113,900,000	'	'	'
Excess tax benefit from employee stock plans	170,000	409,000	47,000	'
Undistributed foreign earnings	2,400,000	'	'	'
Amount of unrecognized deferred tax liability	800,000	'	'	'
Unrecognized tax benefits	2,863,000	2,268,000	1,342,000	998,000
Urecognized tax benefits, foreign assets	0	'	'	'
Internal Revenue Service (IRS) [Member]	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Operating loss carryforwards	147,200,000	'	'	'
Foreign Tax Authority [Member] | CANADA	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Valuation allowance	300,000	'	'	'
State and Local Jurisdiction [Member] | California	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Operating loss carryforwards	43,300,000	'	'	'
Domestic Tax Authority [Member]	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Valuation allowance	47,800,000	41,400,000	'	'
Research Tax Credit Carryforward [Member] | Internal Revenue Service (IRS) [Member]	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Tax credit carryforward	5,500,000	'	'	'
Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member] | California	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Tax credit carryforward	4,900,000	'	'	'
Research Tax Credit Carryforward [Member] | Domestic Tax Authority [Member] | CANADA	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Tax credit carryforward	600,000	'	'	'
Additional Paid-in Capital [Member]	'	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'	'
Excess tax benefit from employee stock plans	$170,000	$409,000	$47,000	'

Income_Taxes_Uncertain_Tax_Pos

Income Taxes (Uncertain Tax Positions) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]	'	'	'
Gross unrecognized tax benefits beginning balance	$2,268	$1,342	$998
Increases related to tax positions taken during current year	612	762	200
Increases (Decreases) related to tax positions from prior years	-17	164	144
Gross unrecognized tax benefits ending balance	$2,863	$2,268	$1,342

Segment_Information_Details

Segment Information (Details) (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
									segment
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Number of reportable segments	'	'	'	'	'	'	'	'	1	'	'
Net revenue	$64,915	$61,022	$60,882	$63,521	$63,065	$58,035	$54,439	$49,505	$250,340	$225,044	$169,246
Property and equipment, net	18,785	'	'	'	18,370	'	'	'	18,785	18,370	'
Americas [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net revenue	'	'	'	'	'	'	'	'	164,323	147,017	108,660
Property and equipment, net	17,882	'	'	'	17,997	'	'	'	17,882	17,997	'
United States [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net revenue	'	'	'	'	'	'	'	'	154,900	138,900	100,600
Property and equipment, net	17,800	'	'	'	18,000	'	'	'	17,800	18,000	'
Europe, Middle East and Africa [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net revenue	'	'	'	'	'	'	'	'	58,570	54,378	40,666
Property and equipment, net	669	'	'	'	149	'	'	'	669	149	'
Asia Pacific [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net revenue	'	'	'	'	'	'	'	'	27,447	23,649	19,920
Property and equipment, net	$234	'	'	'	$224	'	'	'	$234	$224	'

Unautited_Quarterly_Financial_2

Unautited Quarterly Financial Data (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
Net revenue:	'	'	'	'	'	'	'	'	'	'	'
Products and licenses	$32,022	$30,799	$31,565	$35,962	$36,702	$33,596	$30,807	$27,098	'	'	'
Services	32,893	30,223	29,317	27,559	26,363	24,439	23,632	22,407	119,992	96,841	74,234
Total net revenue	64,915	61,022	60,882	63,521	63,065	58,035	54,439	49,505	250,340	225,044	169,246
Cost of revenue:	'	'	'	'	'	'	'	'	'	'	'
Products and licenses	7,235	7,119	7,086	7,887	8,502	7,786	7,100	5,840	'	'	'
Services	7,352	6,665	6,633	5,821	5,324	4,910	4,542	4,249	26,471	19,025	15,342
Total cost of revenue	14,587	13,784	13,719	13,708	13,826	12,696	11,642	10,089	55,798	48,253	37,120
Gross profit	50,328	47,238	47,163	49,813	49,239	45,339	42,797	39,416	194,542	176,791	132,126
Operating expenses:	'	'	'	'	'	'	'	'	'	'	'
Research and development	13,670	12,175	11,844	11,600	11,273	10,976	10,593	10,214	49,289	43,056	36,624
Sales and marketing	38,038	34,589	32,854	33,131	29,508	28,138	29,108	25,631	138,612	112,385	86,474
General and administrative	7,948	7,839	6,848	6,986	7,142	6,195	5,493	5,658	29,621	24,488	15,548
Total operating expenses	59,656	54,603	51,546	51,717	47,923	45,309	45,194	41,503	217,522	179,929	138,646
Loss from operations	-9,328	-7,365	-4,383	-1,904	1,316	30	-2,397	-2,087	-22,980	-3,138	-6,520
Other expense, net	62	124	-103	-101	-247	-45	-220	-106	-18	-618	-946
Loss before provision for income taxes	-9,266	-7,241	-4,486	-2,005	1,069	-15	-2,617	-2,193	-22,998	-3,756	-7,466
Provision for income taxes	266	201	-92	544	-418	242	629	197	919	650	744
Net loss	($9,532)	($7,442)	($4,394)	($2,549)	$1,487	($257)	($3,246)	($2,390)	($23,917)	($4,406)	($8,210)
Net loss per share - basic and diluted	($0.17)	($0.14)	($0.08)	($0.05)	$0.03	($0.01)	($0.07)	($0.05)	($0.45)	($0.09)	($0.40)