A10 Networks (ATEN) 10-Q 4 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 25, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Trading Symbol	'ATEN	'
Entity Registrant Name	'A10 Networks, Inc.	'
Entity Central Index Key	'0001580808	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	59,813,356

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
CURRENT ASSETS	'	'
Cash and cash equivalents	$112,101	$20,793
Accounts receivable, net of allowances of $2,462 and $2,738 as of June 30, 2014 and December 31, 2013	40,455	37,704
Inventory	18,541	17,166
Prepaid expenses and other current assets	4,370	3,056
Total current assets	175,467	78,719
Property and equipment, net	11,945	9,801
Other long-term assets	4,784	5,274
Total Assets	192,196	93,794
LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT)	'	'
Accounts payable	10,805	9,228
Accrued liabilities	19,645	15,514
Accrued litigation expenses	1,368	10,407
Deferred revenue, current	31,315	28,448
Total current liabilities	63,133	63,597
Revolving credit facility	0	20,000
Deferred revenue, long-term	14,527	12,784
Other long-term liabilities	2,162	6,118
Total Liabilities	79,822	102,499
Commitments and contingencies (Note 5)	'	'
STOCKHOLDERS’ EQUITY (DEFICIT):	'	'
Common stock, par value $0.00001 — 500,000 and 65,600 shares authorized as of June 30, 2014 and December 31, 2013; 59,768 and 10,032 shares issued and outstanding as of June 30, 2014 and December 31, 2013	1	0
Additional paid-in capital	265,836	12,185
Accumulated deficit	-153,463	-147,065
Total Stockholders' Equity (Deficit)	112,374	-134,880
Total Liabilities, Redeemable Convertible Preferred Stock, Convertible Preferred Stock And Stockholders' Equity (Deficit)	192,196	93,794
Redeemable Convertible Preferred Stock	'	'
LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT)	'	'
Redeemable convertible preferred stock, no par value—no shares authorized, issued or outstanding as of March 31, 2014; 115 shares authorized, 80 shares issued and outstanding with aggregate liquidation preference of $80,000 as of December 31, 2013	0	81,426
Convertible Preferred Stock	'	'
LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT)	'	'
Redeemable convertible preferred stock, no par value—no shares authorized, issued or outstanding as of March 31, 2014; 115 shares authorized, 80 shares issued and outstanding with aggregate liquidation preference of $80,000 as of December 31, 2013	$0	$44,749

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Allowance for doubtful accounts receivable	$2,462	$2,738
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	500,000,000	65,600,000
Common stock, shares issued	59,768,000	10,032,000
Common stock, shares outstanding	59,768,000	10,032,000
Redeemable Convertible Preferred Stock	'	'
Preferred stock, par value	$0	$0
Preferred stock, shares issued	0	80,000
Preferred stock, shares outstanding	0	80,000
Aggregate liquidation preference	0	80,000
Preferred stock, shares authorized	0	115,000
Convertible Preferred Stock	'	'
Preferred stock, par value	$0.00	$0
Preferred stock, shares issued	100,000,000	30,569,000
Preferred stock, shares outstanding	0	30,569,000
Aggregate liquidation preference	$0	$30,569
Preferred stock, shares authorized	0	42,884,000

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue:	'	'	'	'
Products	$34,122	$23,064	$70,539	$46,333
Services	11,010	7,067	20,338	13,379
Total revenue	45,132	30,131	90,877	59,712
Cost of revenue:	'	'	'	'
Products	7,410	4,894	14,837	9,800
Services	2,930	2,020	5,556	3,718
Total cost of revenue	10,340	6,914	20,393	13,518
Gross profit	34,792	23,217	70,484	46,194
Operating expenses:	'	'	'	'
Sales and marketing	23,975	15,723	45,538	31,312
Research and development	11,869	8,336	23,074	16,108
General and administrative	5,531	3,697	10,894	7,527
Litigation expense (benefit)	-5,859	4,800	-4,013	8,204
Total operating expenses	35,516	32,556	75,493	63,151
Loss from operations	-724	-9,339	-5,009	-16,957
Other income (expense), net:	'	'	'	'
Interest expense	-125	-33	-712	-46
Interest income and other income (expense), net	-138	-683	-163	-1,364
Total other income (expense), net	-263	-716	-875	-1,410
Loss before provision for income taxes	-987	-10,055	-5,884	-18,367
Provision for income taxes	309	158	514	379
Net loss	-1,296	-10,213	-6,398	-18,746
Accretion of redeemable convertible preferred stock dividend	0	-33	-1,150	-33
Net loss attributable to common stockholders	($1,296)	($10,246)	($7,548)	($18,779)
Net loss per share attributable to common stockholders:	'	'	'	'
Basic (in dollars per share)	($0.02)	($1.12)	($0.21)	($2.07)
Diluted (in dollars per share)	($0.02)	($1.12)	($0.21)	($2.07)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted:	'	'	'	'
Basic (in shares)	59,711	9,144	36,712	9,075
Diluted (in shares)	59,711	9,144	36,712	9,075

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net loss	($6,398)	($18,746)
Adjustments to reconcile net loss to net cash used in operating activities:	'	'
Depreciation and amortization	4,738	3,151
Stock-based compensation	4,776	1,727
Gain on settlement of contractual liability (Note 3)	-6,993	0
Provision for doubtful accounts and sales returns	59	458
Fixed assets disposal loss	106	15
Unrealized foreign exchange gain	-226	-43
Changes in operating assets and liabilities:	'	'
Accounts receivable, net	-2,644	320
Inventory	-4,265	-2,797
Prepaid expenses and other current assets	-3,070	618
Accounts payable	2,105	-1,533
Accrued liabilities	3,632	1,263
Accrued litigation expenses	-6,119	-1,445
Deferred revenue	4,610	2,862
Other	-29	124
Net cash used in operating activities	-9,718	-14,026
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Purchases of property and equipment	-3,791	-1,903
Net cash used in investing activities	-3,791	-1,903
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from initial public offering, net of offering costs	122,312	0
Proceeds from issuance of Series D redeemable convertible preferred stock, net of issuance costs	0	49,479
Proceeds from revolving credit facility	0	10,000
Principal payments on revolving credit facility	-20,000	-10,000
Principal payments on term loan	0	-539
Proceeds from exercise of convertible preferred stock warrants	0	813
Proceeds from exercise of common stock options, net of repurchases of common stock	2,658	829
Other	-153	-148
Net cash provided by financing activities	104,817	50,434
Net increase (decrease) in cash and cash equivalents	91,308	34,505
Cash and cash equivalents—beginning of period	20,793	23,867
Cash and cash equivalents—end of period	112,101	58,372
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION:	'	'
Inventory transfers to property and equipment	2,891	2,592
Costs related to the initial public offering included in accounts payable and accrued liabilities	1,424	0
Accretion of Series D redeemable convertible preferred stock	1,150	33
Reclassification of the convertible preferred stock warrant liability to additional paid-in capital upon the exercise of the convertible preferred stock warrants	0	2,199
Purchases of property and equipment included in accounts payable and accrued liabilities	655	195
Vesting of early exercised stock options	$243	$286

Description_of_Business_and_Su

Description of Business and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Description of Business and Significant Accounting Policies	'
	Description of Business and Summary of Significant Accounting Policies
	Description of Business
	A10 Networks, Inc. (together with our subsidiaries, the “Company”, “we”, “our” or “us”) was incorporated in the State of California in 2004 and subsequently reincorporated in the State of Delaware in March 2014.
	Our solutions enable enterprises, service providers, Web giants and government organizations to accelerate, secure and optimize the performance of their data center applications and networks. We currently offer three software based advanced application networking solutions. These are Application Delivery Controllers, or ADCs, to optimize data center performance; Carrier Grade Network Address Translation, or CGN, to provide address and protocol translation services for service provider networks; and a Distributed Denial of Service Threat Protection System, or TPS, for network-wide security protection. We deliver these solutions both on optimized hardware appliances and as virtual appliances across our Thunder Series and AX Series product families.
	Initial Public Offering
	In March 2014, we completed our initial public offering (“IPO”), whereby 12,500,000 shares of common stock were sold to the public at a price per share of $15.00. We sold 9,000,000 common shares and selling stockholders sold 3,500,000 common shares. In April 2014, our underwriters exercised an overallotment available to them and an additional 345,000 shares were sold by our selling stockholders bringing the total shares sold to 12,845,000 for this offering. The total gross proceeds from the offering were $192.7 million. After deducting underwriting discounts and commissions, offering expenses payable by us, and net proceeds received by the selling stockholders, the estimated aggregate net proceeds was $120.2 million. Upon the closing of the initial public offering, all shares of our outstanding redeemable convertible preferred stock and convertible preferred stock converted into 39,997,114 shares of common stock.
	Reverse Stock Split
	On March 6, 2014, we effected a 1-for-3.75 reverse stock split of our common stock and convertible preferred stock (collectively referred to as “Capital Stock”). Shares of our Series D redeemable convertible preferred stock were not subject to the split but instead the conversion price of the Series D redeemable convertible preferred stock was adjusted proportionally to reflect the split of the common stock issued upon conversion of the Series D redeemable convertible preferred stock. On  March 6, 2014 (i) each 3.75 shares of outstanding Capital Stock was combined into 1 share of Capital Stock; (ii) the number of shares of Capital Stock for which each outstanding option to purchase Capital Stock is exercisable was proportionately reduced on a 1-for-3.75 basis; (iii) the exercise price of each such outstanding option was proportionately increased on a 1-for-3.75 basis; (iv) each 3.75 shares of authorized Capital Stock was reduced to 1 share of Capital Stock; and (v) the conversion price of the Series D redeemable convertible preferred stock was adjusted from $2.2628 to $8.4855. All of the share and per share amounts have been adjusted, on a retroactive basis, to reflect this 1-for-3.75 reverse stock split.
	Basis of Presentation and Consolidation
	The accompanying unaudited condensed consolidated financial statements include the accounts of A10 Networks, Inc., and our wholly owned subsidiaries. All inter-company balances and transactions have been eliminated in consolidation.
	We had no comprehensive income (loss) other than our net income (loss), hence our comprehensive income (loss) is the same as the net income (loss) for all periods presented. Pursuant to the accounting guidance provided by Accounting Standard Codification ("ASC") 220 Comprehensive Income, we did not present statements of comprehensive income (loss) for the periods presented.
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), and following the requirements of the Securities and Exchange Commission (“SEC”), for interim reporting. As permitted under those rules, certain notes or other financial information that are normally required by U.S. GAAP can be condensed or omitted. These financial statements have been prepared on the same basis as our annual financial statements and, in the opinion of management, reflect all adjustments, consisting only of normal recurring adjustments that are necessary for a fair statement of our financial information. The results of operations for the three months and six months ended June 30, 2014 are not necessarily indicative of the results to be expected for the year ending December 31, 2014 or for any other interim period or for any other future year. The balance sheet as of December 31, 2013 has been derived from audited financial statements at that date but does not include all of the information required by U.S. GAAP for complete financial statements.
	The accompanying condensed consolidated financial statements and related financial information should be read in conjunction with the audited financial statements and the related notes thereto for the year ended December 31, 2013 included in our prospectus filed with the SEC on March 21, 2014 pursuant to Rule 424(b) under the Securities Act of 1933, as amended (the “Securities Act”).
	Use of Estimates
	The preparation of the consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Those estimates and assumptions affect revenue recognition and deferred revenue, allowance for doubtful accounts, valuation of inventory, contingencies and litigation, and determination of fair value of stock-based compensation. These estimates are based on information available as of the date of the condensed consolidated financial statements; therefore, actual results could differ from management’s estimates.
	Summary of Significant Accounting Policies
	There have been no changes to the significant accounting policies described in the prospectus that have had a material impact on our condensed consolidated financial statements and related notes.
	Concentration of Credit Risk and Significant Customers
	Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents and accounts receivable. Our cash and cash equivalents are invested in high-credit quality financial instruments with banks and financial institutions. Management believes that the financial institutions that hold our cash and cash equivalents are financially sound and, accordingly, are subject to minimal credit risk. Such deposits may be in excess of insured limits provided on such deposits.
	Our accounts receivable are unsecured and represent amounts due to us based on contractual obligations of our customers. We mitigate credit risk in respect to accounts receivable by performing periodic credit evaluations of our customers to assess the probability of accounts receivable collection based on a number of factors, including past transaction experience with the customer, evaluation of their credit history, limiting the credit extended and review of the invoicing terms of the contract. We generally do not require our customers to provide collateral to support accounts receivable. We have recorded an allowance for doubtful accounts for those receivables that we have determined not to be collectible.
	Significant customers, including distribution channel partners and direct customers, are those which represent more than 10% of our total revenues for each period presented, or our gross accounts receivable balance as of each respective balance sheet date.
	Revenues from our significant customers as a percentage of our total revenues for the three and six months ended June 30, 2014 and 2013 are follows:
		Three Months Ended		Six Months Ended
		June 30,		June 30,
	Customers	2014	2013	2014	2013
	Customer A	*	*	14%	*
	Customer B	*	25%	10%	26%
	Customer C	10%	*	*	*
	* represents less than 10% of total revenues
	As of June 30, 2014, another customer represented 20% of our total gross accounts receivable. No other customers accounted for 10% or more our total accounts receivable for the periods presented.
	Recent Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standard 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 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 on January 1, 2014, and the adoption did not have a material impact on our consolidated financial statements since ASU-2013-11 only impacts financial statement disclosure requirements for unrecognized tax benefits.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which provides new guidance on the recognition of revenue and states that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard will be effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. We are currently evaluating the impact of the adoption of this accounting standard update on our consolidated financial position or results of operations.
	There have been no other recent accounting pronouncements or changes in accounting pronouncements during the six months ended June 30, 2014, as compared to the recent accounting pronouncements described in our prospectus filed with SEC on March 21, 2014, that are of significance or potential significance to us.

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	Our financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable, accrued liabilities, preferred stock warrants and debt. Cash equivalents are stated at amortized cost, which approximates fair value as of the balance sheet dates, due to the short period of time to maturity. Accounts receivable, accounts payable and accrued expenses are stated at their carrying value, which approximates fair value due to the short time to the expected receipt or payment. The carrying amount of our revolving credit facility approximates the fair value as the stated interest rate approximates market rates currently available to us.
	As of June 30, 2014 and December 31, 2013, our financial instruments consist of highly liquid money market funds which are classified as Level I assets in the fair value hierarchy as these instruments are valued using quoted market price for identical assets in an active market. We had no assets or liabilities classified within Level 2 or Level 3 as of June 30, 2014 and December 31, 2013 and there were no transfers of instruments between Level 1, Level 2 and Level 3 regarding fair value measurement during the six months ended June 30, 2014.
	The following table sets forth the fair value of our financial assets measured on a recurring basis by level within the fair value hierarchy (in thousands):
		June 30, 2014				December 31, 2013
		Level 1		Total		Level 1		Total
	Financial Assets
	Money market funds	$	104,048	$	104,048	$	14,029	$	14,029
	We did not have realized gains or losses for the three and six months ended June 30, 2014 or 2013 related to our financial assets.

Balance_Sheet_Components

Balance Sheet Components	6 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Balance Sheet Components	'
	Balance Sheets Components
	Inventory
	Components of inventory as of June 30, 2014 and December 31, 2013 are shown below (in thousands):
		June 30,			December 31,
		2014			2013
	Raw materials	$	10,542		$	10,625
	Finished goods	7,999			6,541
	Total inventory	$	18,541		$	17,166
	Property and Equipment, Net
	Components of property and equipment, net as of June 30, 2014 and December 31, 2013 are shown below (in thousands):
		June 30,			December 31,
		2014			2013
	Equipment	$	26,853		$	21,188
	Software	2,748			2,479
	Leasehold improvements	1,756			1,325
	Furniture and fixtures	858			777
	Construction in progress	269			123
	Property and equipment, gross	32,484			25,892
	Less: accumulated depreciation and amortization	(20,539		)	(16,091		)
	Total property and equipment, net	$	11,945		$	9,801
	Depreciation and amortization on our property and equipment for the three and six months ended June 30, 2014 was $2.5 million and $4.7 million. Depreciation and amortization on our property and equipment for the three and six months ended June 30, 2013 was $1.7 million and $3.1 million.
	Deferred Revenue
	Deferred revenue as of June 30, 2014 and December 31, 2013 consists of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Deferred revenue:
	Products	$	2,175		$	3,170
	Services	43,667			38,062
	Total deferred revenue	45,842			41,232
	Less: current portion	(31,315		)	(28,448		)
	Long-term portion	$	14,527		$	12,784
	Accrued Liabilities
	Accrued liabilities as of June 30, 2014 and December 31, 2013 consists of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Accrued compensation and benefits	$	11,745		$	9,015
	Accrued tax liabilities	3,234			2,156
	Other	4,666			4,343
	Total accrued liabilities	$	19,645		$	15,514
	Settlement of Contractual Liability
	In May 2014, we reached a settlement agreement with one of our legal service providers which resulted in the reduction of a previously accrued contractual liability that totaled $12.0 million. We made a payment of $5.0 million in accordance with the terms of the settlement agreement and recorded a $7.0 million benefit to litigation expense during the three months ended June 30, 2014.

Credit_Facility

Credit Facility	6 Months Ended
	Jun. 30, 2014
Line of Credit Facility [Abstract]	'
Credit Facility	'
	Credit Facility
	In September 2013, we entered into a credit agreement with Royal Bank of Canada, JPMorgan Chase Bank, N.A. and Bank of America, N.A. as lenders. The credit agreement provides a three year $35.0 million revolving credit facility, which includes a maximum $10.0 million letter of credit facility. In March 2014, we repaid the $20.0 million outstanding borrowing under this credit facility. As of June 30, 2014, we have no outstanding borrowings under this credit facility.
	Our obligations under the credit agreement are secured by a security interest on substantially all of our assets, including our intellectual property. The credit agreement contains customary financial and non-financial covenants, and are described in Note 5, Debt, in the Notes to Consolidated Financial Statements of our final prospectus filed with the SEC on March 21, 2014. We were in compliance with all financial and nonfinancial covenants under the revolving credit facility as of June 30, 2014.
	At our option, the revolving credit facility bears interest at a rate per annum based on either (i) an alternate base rate plus a margin ranging from 1.75% to 2.50% depending on our total leverage ratio, or (ii) the London interbank offered rate, or LIBOR, based on one, two, three or six month interest periods plus a margin ranging from 2.75% to 3.50% depending on our total leverage ratio. The alternate base rate is equal to the greatest of (i) the Royal Bank of Canada’s prime rate, (ii) the federal funds rate plus a margin equal to 0.50% and (iii) the Eurodollar rate for a one month interest period plus a margin equal to 1.00%.
	In addition, we incurred $1.0 million of debt issuance costs that were directly attributable to the issuance of this revolving credit facility which will be amortized to interest expense over the three-year term of this credit facility. As of June 30, 2014, the unamortized debt issuance costs of $0.7 million were included within other assets in our condensed consolidated balance sheets. We are also required to pay quarterly facility fees of 0.45% per annum on the average daily unused portion of the revolving credit facility.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Legal Proceedings
	From time to time, we may be party or subject to various legal proceedings and claims, either asserted or unasserted, which arise in the ordinary course of business, including proceedings and claims that relate to intellectual property matters. Some of these proceedings involve claims that are subject to substantial uncertainties and unascertainable damages. Accordingly, except as disclosed, we have not established reserves or ranges of possible loss related to these proceedings, as at this time in the proceedings, if any, the matters do not relate to a probable loss and/or amounts are not reasonably estimated. Although we believe that we have a strong defense for the litigation proceedings described below, there are many uncertainties associated with any litigation and these actions or other third-party claims against us may cause us to incur costly litigation and/or substantial settlement charges that could have a material adverse effect on our results of operations, financial position, or cash flows. In addition, the resolution of any future intellectual property litigation may require us to make royalty payments and/or settlement payments, which could adversely affect gross margin and operating expenses in future periods.
	Radware  v. A10
	In May 2013, Radware, Ltd., and Radware, Inc. (collectively, “Radware”) filed suit against us in the United States District Court for the Northern District of California (the "Court"), asserting that our AX Series and EX Series products infringe three of Radware’s U.S. patents. Radware has also asserted similar claims against F5 Networks, Inc. (“F5”). We responded to the complaint on June 24, 2013. In June 2014, the Court granted-in-part and denied-in-part A10’s motion for summary judgment of non-infringement and denied A10’s motion for summary judgment of invalidity. No trial date has been set and the parties are in the process of conducting discovery.
	Parallel v. A10
	In November 2013, Parallel Networks, LLC (“Parallel Networks”), which we believe is a non-practicing patent holding company, filed a lawsuit against us in the United States District Court for the District of Delaware. In the lawsuit, Parallel Networks alleges that our AX and Thunder series products infringe two of their U.S. patents. Parallel Networks is seeking injunctive relief, damages and attorneys’ fees and costs. Parallel Networks has asserted similar claims against other companies, including Array Networks, Inc., Barracuda Networks, Inc., Brocade Communications Systems, Inc., Cisco Systems, Inc., Citrix Systems, Inc., F5, Radware, Ltd., Riverbed Technology, Inc. and SAP AG. The separate trials for each defendant in these related actions are set to commence in June 2016 in accordance with an order to be set forth in a trial sequencing conference.
	These matters are in the early stages, but we intend to vigorously defend the lawsuits. We are unable to reasonably estimate a possible loss or range of possible loss if any, in regards to these matters; therefore, no litigation reserve has been recorded in the accompanying consolidated balance sheet.
	Lease Obligations and Other Commitments
	We lease various operating spaces in California, Asia, and Europe under noncancelable operating lease arrangements that expire on various dates through January 2016. These arrangements require us to pay certain operating expenses, such as taxes, repairs, and insurance and contain renewal and escalation clauses.
	We have entered into agreements with some of our customers that contain indemnification provisions in the event of claims alleging that our products infringe the intellectual property rights of a third party. 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.

Equity_Award_Plans

Equity Award Plans	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Equity Award Plans	'
	Equity Award Plans
	Equity Incentive Plans
	2008 Plans
	We adopted the 2008 Stock Option Plan (the "2008 Plan") for the purpose of granting stock-based awards to eligible service providers, which included our employees, directors, and consultants as well as employees and consultants of our subsidiaries. Stock options granted under the 2008 Plan were either incentive stock options (“ISOs”) or nonstatutory stock options (“NSOs”). With the establishment of the 2014 Equity Incentive Plan (the "2014 Plan") in March 2014, we terminated the 2008 Plan. Upon such termination, we ceased granting any awards under the 2008 Plan.
	2014 Equity Incentive Plan
	The 2014 Plan was adopted by our board of directors and approved by our stockholders in March 2014. The 2014 Plan was effective as of the business day immediately prior to the effectiveness of our registration statement for our initial public offering. The 2014 Plan replaced the 2008 Plan. Our 2014 Plan provides for the granting of stock options, restricted stock awards ("RSAs"), restricted stock units ("RSUs"), stock appreciation rights, performance units and performance shares to our employees, directors and consultants, and our subsidiary corporations’ employees and consultants.
	A total of 7,700,000 shares of our common stock are reserved for issuance pursuant to the 2014 Plan. On the first day of each fiscal year, starting with January 1, 2015, the number of shares in the reserve will increase by the lesser of (i) 8,000,000 shares, (ii) 5% of the outstanding shares of common stock on the last day of our immediately preceding fiscal year, or (iii) such other amount as determined by our board of directors. As of June 30, 2014, we have granted 553,123 stock options and 102,265 RSUs under the 2014 Plan to our employees and consultants, we have 7,070,532 shares available for future grant.
	Vesting periods of awards granted under the 2014 Plan are determined by the board of directors or other committees responsible for administering the 2014 Plan (the "Plan Administrators"). The Plan Administrators determine the contractual terms of awards granted under the 2014 Plan, provided that incentive stock options and stock appreciation rights granted expire no more than ten years from the grant date. In the case of an incentive stock option granted to an employee, who at the time of grant, owns stock representing more than 10% of the total combined voting power of all classes of stock, the exercise price shall be no less than 110% of the fair value per share on the date of grant, and expire five years from the date of grant, and for incentive stock options granted to any other employee, and nonstatutory stock options and stock appreciation rights granted to employees, directors or consultants, the per share exercise price shall be no less than 100% of the fair value per share on the date of grant.
	Recipients of RSAs generally will have voting and dividend rights with respect to such shares upon grant without regard to vesting, unless the Plan Administrators provide otherwise.
	RSUs granted under the 2014 Plan may be subject to vesting criteria which may be based on achievement of corporate or individual goals, including but not limited to continued services, applicable laws or any other basis that the Plan Administrators determine.
	Performance units have an initial dollar value established by the Plan Administrators on or before the grant date. Performance shares will have an initial value equal to the fair market value of a share on the date of grant. The Plan Administrators will establish, at their discretion, (and may subsequently reduce or waive) performance goals or other vesting provisions, which depending on the extent to which they are met, will determine the number and/or the value of performance units and performance shares to be paid out to participants.
	2014 Employee Stock Purchase Plan
	The 2014 Employee Stock Purchase Plan (the "2014 ESPP") was adopted by our board of directors and approved by our stockholders in March 2014 and was effective as of the business day immediately prior to the effectiveness of our registration statement for our initial public offering.
	As of June 30, 2014, a total of 1,600,000 shares of our common stock are available for purchase under the 2014 ESPP On the first day of each fiscal year, starting with January 1, 2015, the number of shares in the reserve will increase by the least of (i) 3,500,000 shares, (ii) 1% of the outstanding shares of our common stock on the last day of the immediately preceding fiscal year, or (iii) such other amount as determined by our board of directors or other committee administering the 2014 ESPP.
	The 2014 ESPP permits eligible employees to acquire shares of our common stock at 85% of the lower of the fair market value of our common stock on the first trading day of each offering period or on the exercise date that occurs at the end of a purchase period. Each offering period will be approximately twenty-four months in duration, starting on the first trading day on or after May 21 and November 21 of each year, except for the first offering period, which commenced on March 21, 2014 and will end on the last trading day on or before May 20, 2016. Each offering period generally consists of four purchase periods and each purchase period will begin after one exercise date and end with the next exercise date approximately six months later, except that the first purchase period of an offering period will begin on the enrollment date of each offering period and end on the next exercise date. If the fair market value of our common stock on the exercise date is less than the fair market value on the first trading day of the offering period, participants will be withdrawn from the then‑current offering period following their purchase of shares on the purchase date and automatically will be enrolled in the immediately following offering period. Participants may purchase shares of common stock through payroll deductions of up to 15% of their eligible compensation, subject to purchase limits of 1,500 shares during each six month purchase period or $25,000 worth of stock for each calendar year.
	Stock Option Activity
	The following table summarizes our stock option activity and related information as of and for the six months ended June 30, 2014 (in thousands, except for years and per share amounts):
			Number of Shares Underlying Outstanding Options			Weighted-Average Exercise Price				Weighted-Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
	Outstanding as of December 31, 2013		9,971			$	4.14			7.9	$	58,515
	Granted		1,264			$	13.36
	Exercised		(1,050	)		$	2.54
	Canceled		(444	)		$	5.71
	Outstanding as of June 30, 2014		9,741			$	5.44			7.8	$	77,371
	Vested and expected to vest as of June 30, 2014		9,284			$	5.27			7.7	$	75,244
	Vested and exercisable as of June 30, 2014		4,697			$	2.73			6.5	$	49,664
	The following table provides information pertaining to our stock options for the six months ended June 30, 2014 and 2013 (in thousands, except weighted-average fair values):
		Six Months Ended June 30,
		2014				2013
	Total fair value of options granted	$	7,536			$	3,300
	Weighted average fair value of options granted	$	5.96			$	2.59
	Intrinsic value of options exercised	$	8,818			$	1,111
	The aggregate intrinsic value represents the difference between our estimated fair value of our common stock, prior to the IPO, or the closing stock price of our common stock, following the IPO, compared to the exercise price of the outstanding, in-the-money options.
	Restricted Stock Units Activity
	The following table summarizes restricted stock units activity under all of our equity incentive plans for the six months ended June 30, 2014 (in thousands, except for weighted average grant date fair value):
		Number of Shares			Weighted Average Grant Date Fair Value
	Outstanding as of December 31, 2013	—			$	—
	Granted	102			13.15
	Released	—			—
	Canceled	—			—
	Outstanding as of June 30, 2014	102			$	13.15
	Valuation Assumptions
	We use the Black-Scholes valuation model to determine the fair value of stock options and ESPP. The Black-Scholes model requires the input of highly subjective assumptions, which are summarized in the table below for the three and six months ended June 30, 2014 and 2013:
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	Stock Options: *
	Expected term (in years)	5.5		n/a		5.5		6.08
	Risk-free interest rate	1.73%		n/a		1.73%		1.12%
	Expected volatility	45%		n/a		47%		46%
	Dividend rate	—%		n/a		—%		—%
	ESPP: **
	Expected term (in years)	1.4		n/a		1.4		n/a
	Risk-free interest rate	0.24%		n/a		0.24%		n/a
	Expected volatility	31%		n/a		31%		n/a
	Dividend rate	—%		n/a		—%		n/a
	* We did not grant stock options during the three months ended June 30, 2013
	** We did not have an ESPP plan prior to the adoption of our 2014 ESPP plan in March 2014.
	Stock-based Compensation
	The total stock-based compensation recognized for stock-based awards granted under the 2014 Plan, the 2008 Plan, the 2004 Plan and the 2014 ESPP for the three and six months ended June 30, 2014 and 2013 are as follows (in thousands):
		Three Months Ended June 30,							Six Months Ended June 30,
		2014				2013			2014			2013
	Cost of revenue	$	216			$	32		$	301		$	64
	Sales and marketing	1,457				471			2,341			945
	Research and development	944				268			1,407			529
General and administrative	389				93			727			189
Total stock-based compensation	$	3,006			$	864		$	4,776		$	1,727
At June 30, 2014, total compensation expense related to unvested share-based awards granted to employees under our stock plans but not yet recognized was $17.5 million, net of estimated forfeitures. This expense is expected to be amortized on a straight-line basis over a weighted-average period of 2.9 years.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	For periods presented prior to the IPO, basic and diluted net income (loss) per common share is computed using the two-class method required for participating securities. Concurrent with the closing of the IPO in March 2014, all shares of outstanding preferred stock converted into shares of our common stock. Following the date of the IPO, the two-class method was no longer required. We currently have one outstanding class of securities.
	The following table sets forth the computation of our basic and diluted net income (loss) per share (in thousands, except per share data):
		Three Months Ended June 30,							Six Months Ended June 30,
		2014				2013			2014			2013
	Net loss attributable to common stockholders	$	(1,296	)		$	(10,246	)	$	(7,548	)	$	(18,779	)
	Weighted-average shares outstanding used in computing basic and diluted net loss per share	59,711				9,144			36,712			9,075
	Net loss attributable to common stockholders, basic and diluted	$	(0.02	)		$	(1.12	)	$	(0.21	)	$	(2.07	)
	The following outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive (in thousands):
		Three Months Ended June 30,						Six Months Ended June 30,
		2014			2013			2014		2013
	Convertible preferred stock (on an as if converted basis)	—			30,828			—		30,611
	Stock options and restricted stock units	9,994			7,833			9,965		7,695
	Common stock subject to repurchase	311			348			311		377
	Convertible preferred stock warrants	—			—			—		89
		10,305			39,009			10,276		38,772

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	We recorded income tax expense of $0.3 million and $0.5 million for the three and six months ended June 30, 2014, which was primarily comprised of state and foreign taxes. We recorded income tax expense of $0.2 million and $0.4 million for the three and six months ended June 30, 2013, which was primarily comprised of state and foreign taxes. The provision for income taxes for these periods was determined using the annual effective tax rate method by excluding the entities that are not expected to realize tax benefit from the operating losses. As a result, and excluding the impact of discrete tax events during the quarter, the provision for income taxes was at a higher consolidated effective rate than would have resulted if all entities were profitable or if losses produced tax benefits.
	We believe it is more likely than not that our federal and state net deferred tax assets will not be fully realized.  Accordingly, we maintain a valuation allowance against all of its net deferred tax assets as of June 30, 2014 and December 31, 2013. We will continue to maintain a full valuation allowance against our net federal, state and certain foreign deferred tax assets until there is sufficient evidence to support recoverability of its deferred tax assets.
	We had $2.3 million and $1.8 million of unrecognized tax benefits as of June 30, 2014 and December 31, 2013.  We do not anticipate a material change to our unrecognized tax benefits over the next twelve months. Unrecognized tax benefits may change during the next twelve months for items that arise in the ordinary course of business.
	Accrued interest and penalties related to unrecognized tax benefits are recognized as part of our income tax provision in condensed consolidated statements of operations.  All tax years remain open and are subject to future examinations by federal, state and foreign tax authorities. We are not under examination in any jurisdiction.

Segment_Information

Segment Information	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	Our chief operating decision maker is our Chief Executive Officer who reviews financial information presented on a consolidated basis, accompanied by disaggregated information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. Accordingly, we have a single reportable segment and operating segment structure.
	The following table represents revenues by geographic areas based on customers' location, as determined by their ship to addresses (in thousands):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	United States	$	26,215	$	10,303	$	44,428	$	20,876
	Japan	8,471		11,644		25,775		24,042
	Asia Pacific, excluding Japan	4,370		3,522		8,675		6,068
	EMEA	3,925		3,276		8,065		4,929
	Other	2,151		1,386		3,934		3,797
	Total revenue	$	45,132	$	30,131	$	90,877	$	59,712
	No other country outside of the United States and Japan comprised 10% or greater of our revenue for the three months ended June 30, 2014 and 2013.
	Geographical information relating to our long-lived assets which include property and equipment, net and intangible assets, net as of June 30, 2014 and December 31, 2013 was as follows (in thousands):
		June 30,		December 31,
		2014		2013
	United States	$	10,605	$	8,599
	Japan	380		572
	Asia Pacific, excluding Japan	1,920		1,657
	EMEA	106		34
	Total property and equipment, net and intangible assets, net	$	13,011	$	10,862

Relatedparty_Transactions

Related-party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
Related-party Transactions	'
	Related-Party Transactions
	An affiliate of one of our significant stockholders is also acting as a reseller of our products. During the three and six months ended June 30, 2014, we recognized $0.6 million and $1.1 million total revenue from this reseller. During the three and six months ended June 30, 2013, we recognized $1.6 million and $2.6 million total revenue from this reseller.
	We had gross accounts receivable of $0.1 million from this reseller as of June 30, 2014 and December 31, 2013.

Description_of_Business_and_Su1

Description of Business and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Description of Business	'
	Description of Business
	A10 Networks, Inc. (together with our subsidiaries, the “Company”, “we”, “our” or “us”) was incorporated in the State of California in 2004 and subsequently reincorporated in the State of Delaware in March 2014.
	Our solutions enable enterprises, service providers, Web giants and government organizations to accelerate, secure and optimize the performance of their data center applications and networks. We currently offer three software based advanced application networking solutions. These are Application Delivery Controllers, or ADCs, to optimize data center performance; Carrier Grade Network Address Translation, or CGN, to provide address and protocol translation services for service provider networks; and a Distributed Denial of Service Threat Protection System, or TPS, for network-wide security protection. We deliver these solutions both on optimized hardware appliances and as virtual appliances across our Thunder Series and AX Series product families.
Initial Public Offering	'
	Initial Public Offering
	In March 2014, we completed our initial public offering (“IPO”), whereby 12,500,000 shares of common stock were sold to the public at a price per share of $15.00. We sold 9,000,000 common shares and selling stockholders sold 3,500,000 common shares. In April 2014, our underwriters exercised an overallotment available to them and an additional 345,000 shares were sold by our selling stockholders bringing the total shares sold to 12,845,000 for this offering. The total gross proceeds from the offering were $192.7 million. After deducting underwriting discounts and commissions, offering expenses payable by us, and net proceeds received by the selling stockholders, the estimated aggregate net proceeds was $120.2 million. Upon the closing of the initial public offering, all shares of our outstanding redeemable convertible preferred stock and convertible preferred stock converted into 39,997,114 shares of common stock.
Reverse Stock Split	'
	Reverse Stock Split
	On March 6, 2014, we effected a 1-for-3.75 reverse stock split of our common stock and convertible preferred stock (collectively referred to as “Capital Stock”). Shares of our Series D redeemable convertible preferred stock were not subject to the split but instead the conversion price of the Series D redeemable convertible preferred stock was adjusted proportionally to reflect the split of the common stock issued upon conversion of the Series D redeemable convertible preferred stock. On  March 6, 2014 (i) each 3.75 shares of outstanding Capital Stock was combined into 1 share of Capital Stock; (ii) the number of shares of Capital Stock for which each outstanding option to purchase Capital Stock is exercisable was proportionately reduced on a 1-for-3.75 basis; (iii) the exercise price of each such outstanding option was proportionately increased on a 1-for-3.75 basis; (iv) each 3.75 shares of authorized Capital Stock was reduced to 1 share of Capital Stock; and (v) the conversion price of the Series D redeemable convertible preferred stock was adjusted from $2.2628 to $8.4855. All of the share and per share amounts have been adjusted, on a retroactive basis, to reflect this 1-for-3.75 reverse stock split.
Basis of Presentation and consolidation	'
	Basis of Presentation and Consolidation
	The accompanying unaudited condensed consolidated financial statements include the accounts of A10 Networks, Inc., and our wholly owned subsidiaries. All inter-company balances and transactions have been eliminated in consolidation.
	We had no comprehensive income (loss) other than our net income (loss), hence our comprehensive income (loss) is the same as the net income (loss) for all periods presented. Pursuant to the accounting guidance provided by Accounting Standard Codification ("ASC") 220 Comprehensive Income, we did not present statements of comprehensive income (loss) for the periods presented.
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), and following the requirements of the Securities and Exchange Commission (“SEC”), for interim reporting. As permitted under those rules, certain notes or other financial information that are normally required by U.S. GAAP can be condensed or omitted. These financial statements have been prepared on the same basis as our annual financial statements and, in the opinion of management, reflect all adjustments, consisting only of normal recurring adjustments that are necessary for a fair statement of our financial information. The results of operations for the three months and six months ended June 30, 2014 are not necessarily indicative of the results to be expected for the year ending December 31, 2014 or for any other interim period or for any other future year. The balance sheet as of December 31, 2013 has been derived from audited financial statements at that date but does not include all of the information required by U.S. GAAP for complete financial statements.
	The accompanying condensed consolidated financial statements and related financial information should be read in conjunction with the audited financial statements and the related notes thereto for the year ended December 31, 2013 included in our prospectus filed with the SEC on March 21, 2014 pursuant to Rule 424(b) under the Securities Act of 1933, as amended (the “Securities Act”).
Use of Estimates	'
	Use of Estimates
	The preparation of the consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Those estimates and assumptions affect revenue recognition and deferred revenue, allowance for doubtful accounts, valuation of inventory, contingencies and litigation, and determination of fair value of stock-based compensation. These estimates are based on information available as of the date of the condensed consolidated financial statements; therefore, actual results could differ from management’s estimates.
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	There have been no changes to the significant accounting policies described in the prospectus that have had a material impact on our condensed consolidated financial statements and related notes.
Concentration of Credit Risk and Significant Customers	'
	Concentration of Credit Risk and Significant Customers
	Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents and accounts receivable. Our cash and cash equivalents are invested in high-credit quality financial instruments with banks and financial institutions. Management believes that the financial institutions that hold our cash and cash equivalents are financially sound and, accordingly, are subject to minimal credit risk. Such deposits may be in excess of insured limits provided on such deposits.
	Our accounts receivable are unsecured and represent amounts due to us based on contractual obligations of our customers. We mitigate credit risk in respect to accounts receivable by performing periodic credit evaluations of our customers to assess the probability of accounts receivable collection based on a number of factors, including past transaction experience with the customer, evaluation of their credit history, limiting the credit extended and review of the invoicing terms of the contract. We generally do not require our customers to provide collateral to support accounts receivable. We have recorded an allowance for doubtful accounts for those receivables that we have determined not to be collectible.
	Significant customers, including distribution channel partners and direct customers, are those which represent more than 10% of our total revenues for each period presented, or our gross accounts receivable balance as of each respective balance sheet date.
	Revenues from our significant customers as a percentage of our total revenues for the three and six months ended June 30, 2014 and 2013 are follows:
		Three Months Ended		Six Months Ended
		June 30,		June 30,
	Customers	2014	2013	2014	2013
	Customer A	*	*	14%	*
	Customer B	*	25%	10%	26%
	Customer C	10%	*	*	*
	* represents less than 10% of total revenues
	As of June 30, 2014, another customer represented 20% of our total gross accounts receivable. No other customers accounted for 10% or more our total accounts receivable for the periods presented.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standard 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 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 on January 1, 2014, and the adoption did not have a material impact on our consolidated financial statements since ASU-2013-11 only impacts financial statement disclosure requirements for unrecognized tax benefits.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which provides new guidance on the recognition of revenue and states that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard will be effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. We are currently evaluating the impact of the adoption of this accounting standard update on our consolidated financial position or results of operations.
	There have been no other recent accounting pronouncements or changes in accounting pronouncements during the six months ended June 30, 2014, as compared to the recent accounting pronouncements described in our prospectus filed with SEC on March 21, 2014, that are of significance or potential significance to us.

Description_of_Business_and_Su2

Description of Business and Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Schedule of Revenue as Percentage of Total Revenue and Accounts Receivable as Percentage of Total Net Accounts Receivable	'
	Significant customers, including distribution channel partners and direct customers, are those which represent more than 10% of our total revenues for each period presented, or our gross accounts receivable balance as of each respective balance sheet date.
	Revenues from our significant customers as a percentage of our total revenues for the three and six months ended June 30, 2014 and 2013 are follows:
		Three Months Ended		Six Months Ended
		June 30,		June 30,
	Customers	2014	2013	2014	2013
	Customer A	*	*	14%	*
	Customer B	*	25%	10%	26%
	Customer C	10%	*	*	*
	* represents less than 10% of total revenues
	As of June 30, 2014, another customer represented 20% of our total gross accounts receivable. No other customers accounted for 10% or more our total accounts receivable for the periods presented.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value of Assets Measured on Recurring Basis	'
	The following table sets forth the fair value of our financial assets measured on a recurring basis by level within the fair value hierarchy (in thousands):
		June 30, 2014				December 31, 2013
		Level 1		Total		Level 1		Total
	Financial Assets
	Money market funds	$	104,048	$	104,048	$	14,029	$	14,029

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Schedule of Inventory	'
	Components of inventory as of June 30, 2014 and December 31, 2013 are shown below (in thousands):
		June 30,			December 31,
		2014			2013
	Raw materials	$	10,542		$	10,625
	Finished goods	7,999			6,541
	Total inventory	$	18,541		$	17,166
Schedule of Property and Equipment, Net	'
	Components of property and equipment, net as of June 30, 2014 and December 31, 2013 are shown below (in thousands):
		June 30,			December 31,
		2014			2013
	Equipment	$	26,853		$	21,188
	Software	2,748			2,479
	Leasehold improvements	1,756			1,325
	Furniture and fixtures	858			777
	Construction in progress	269			123
	Property and equipment, gross	32,484			25,892
	Less: accumulated depreciation and amortization	(20,539		)	(16,091		)
	Total property and equipment, net	$	11,945		$	9,801
Schedule of Deferred Revenue	'
	Deferred revenue as of June 30, 2014 and December 31, 2013 consists of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Deferred revenue:
	Products	$	2,175		$	3,170
	Services	43,667			38,062
	Total deferred revenue	45,842			41,232
	Less: current portion	(31,315		)	(28,448		)
	Long-term portion	$	14,527		$	12,784
Schedule of accrued liabilities	'
	Accrued liabilities as of June 30, 2014 and December 31, 2013 consists of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Accrued compensation and benefits	$	11,745		$	9,015
	Accrued tax liabilities	3,234			2,156
	Other	4,666			4,343
	Total accrued liabilities	$	19,645		$	15,514

Equity_Award_Plans_Tables

Equity Award Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of Activity under Stock Option Plans	'
	The following table summarizes our stock option activity and related information as of and for the six months ended June 30, 2014 (in thousands, except for years and per share amounts):
			Number of Shares Underlying Outstanding Options			Weighted-Average Exercise Price				Weighted-Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
	Outstanding as of December 31, 2013		9,971			$	4.14			7.9	$	58,515
	Granted		1,264			$	13.36
	Exercised		(1,050	)		$	2.54
	Canceled		(444	)		$	5.71
	Outstanding as of June 30, 2014		9,741			$	5.44			7.8	$	77,371
	Vested and expected to vest as of June 30, 2014		9,284			$	5.27			7.7	$	75,244
	Vested and exercisable as of June 30, 2014		4,697			$	2.73			6.5	$	49,664
Stock Option Information	'
	The following table provides information pertaining to our stock options for the six months ended June 30, 2014 and 2013 (in thousands, except weighted-average fair values):
		Six Months Ended June 30,
		2014				2013
	Total fair value of options granted	$	7,536			$	3,300
	Weighted average fair value of options granted	$	5.96			$	2.59
	Intrinsic value of options exercised	$	8,818			$	1,111
Summary of Restricted Stock Units Activity	'
	The following table summarizes restricted stock units activity under all of our equity incentive plans for the six months ended June 30, 2014 (in thousands, except for weighted average grant date fair value):
		Number of Shares			Weighted Average Grant Date Fair Value
	Outstanding as of December 31, 2013	—			$	—
	Granted	102			13.15
	Released	—			—
	Canceled	—			—
	Outstanding as of June 30, 2014	102			$	13.15
Summary of Valuation Assumptions	'
	The Black-Scholes model requires the input of highly subjective assumptions, which are summarized in the table below for the three and six months ended June 30, 2014 and 2013:
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	Stock Options: *
	Expected term (in years)	5.5		n/a		5.5		6.08
	Risk-free interest rate	1.73%		n/a		1.73%		1.12%
	Expected volatility	45%		n/a		47%		46%
	Dividend rate	—%		n/a		—%		—%
	ESPP: **
	Expected term (in years)	1.4		n/a		1.4		n/a
	Risk-free interest rate	0.24%		n/a		0.24%		n/a
	Expected volatility	31%		n/a		31%		n/a
	Dividend rate	—%		n/a		—%		n/a
	* We did not grant stock options during the three months ended June 30, 2013
	** We did not have an ESPP plan prior to the adoption of our 2014 ESPP plan in March 2014.
Total Stock-Based Compensation Recognized For Stock-Based Awards	'
	The total stock-based compensation recognized for stock-based awards granted under the 2014 Plan, the 2008 Plan, the 2004 Plan and the 2014 ESPP for the three and six months ended June 30, 2014 and 2013 are as follows (in thousands):
		Three Months Ended June 30,							Six Months Ended June 30,
		2014				2013			2014			2013
	Cost of revenue	$	216			$	32		$	301		$	64
	Sales and marketing	1,457				471			2,341			945
	Research and development	944				268			1,407			529
	General and administrative	389				93			727			189
	Total stock-based compensation	$	3,006			$	864		$	4,776		$	1,727

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Summary of Computation of Basic and Diluted Net Loss Per Share	'
	The following table sets forth the computation of our basic and diluted net income (loss) per share (in thousands, except per share data):
		Three Months Ended June 30,							Six Months Ended June 30,
		2014				2013			2014			2013
	Net loss attributable to common stockholders	$	(1,296	)		$	(10,246	)	$	(7,548	)	$	(18,779	)
	Weighted-average shares outstanding used in computing basic and diluted net loss per share	59,711				9,144			36,712			9,075
	Net loss attributable to common stockholders, basic and diluted	$	(0.02	)		$	(1.12	)	$	(0.21	)	$	(2.07	)
Summary of Outstanding Shares of Common Stock Equivalents	'
	The following outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive (in thousands):
		Three Months Ended June 30,						Six Months Ended June 30,
		2014			2013			2014		2013
	Convertible preferred stock (on an as if converted basis)	—			30,828			—		30,611
	Stock options and restricted stock units	9,994			7,833			9,965		7,695
	Common stock subject to repurchase	311			348			311		377
	Convertible preferred stock warrants	—			—			—		89
		10,305			39,009			10,276		38,772

Segment_Information_Tables

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Total Revenue Based on Customer's Location	'
	The following table represents revenues by geographic areas based on customers' location, as determined by their ship to addresses (in thousands):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	United States	$	26,215	$	10,303	$	44,428	$	20,876
	Japan	8,471		11,644		25,775		24,042
	Asia Pacific, excluding Japan	4,370		3,522		8,675		6,068
	EMEA	3,925		3,276		8,065		4,929
	Other	2,151		1,386		3,934		3,797
	Total revenue	$	45,132	$	30,131	$	90,877	$	59,712
Schedule of Long-lived Assets, Net by Location	'
	Geographical information relating to our long-lived assets which include property and equipment, net and intangible assets, net as of June 30, 2014 and December 31, 2013 was as follows (in thousands):
		June 30,		December 31,
		2014		2013
	United States	$	10,605	$	8,599
	Japan	380		572
	Asia Pacific, excluding Japan	1,920		1,657
	EMEA	106		34
	Total property and equipment, net and intangible assets, net	$	13,011	$	10,862

Description_of_Business_and_Su3

Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) (USD $)	1 Months Ended	6 Months Ended		6 Months Ended	0 Months Ended		1 Months Ended
In Millions, except Share data, unless otherwise specified	Apr. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Mar. 06, 2014	Mar. 06, 2014	Mar. 31, 2014	Apr. 30, 2014	Mar. 31, 2014	Apr. 30, 2014	Mar. 31, 2014
				Series D Preferred Stock	Series D Preferred Stock	Series D Preferred Stock	IPO	IPO	Sold by ATEN	Selling Stockholders	Selling Stockholders
					Minimum	Maximum
Basis Of Presentation And Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Business Incorporation, year	'	'2004	'	'	'	'	'	'	'	'	'
Entity, state of incorporation	'	'Delaware	'	'	'	'	'	'	'	'	'
Initial public offering (closing) period	'	'	'	'	'	'	'In March 2014	'	'	'	'
Common stock, shares issued	'	59,768,000	10,032,000	'	'	'	12,500,000	12,845,000	9,000,000	345,000	3,500,000
Common stock share issue price under IPO, per share	'	'	'	'	'	'	$15	'	'	'	'
Gross proceeds from issuance initial public offering	$192.70	'	'	'	'	'	'	'	'	'	'
Net proceeds from issuance initial public offering	$120.20	'	'	'	'	'	'	'	'	'	'
Conversion of outstanding, redeemable and convertible preferred stock into common stock	39,997,114	'	'	'	'	'	'	'	'	'	'
Capital stock reverse split descriptions	'	'	'	'the Company effected a 1-for-3.75 reverse stock split of our common stock and convertible preferred stock (collectively referred to as “Capital Stock”)	'	'	'	'	'	'	'
Conversion price of redeemable convertible preferred stock	'	'	'	'	$2.26	$8.49	'	'	'	'	'

Description_of_Business_and_Su4

Description of Business and Summary of Significant Accounting Policies - Schedule of Revenue as Percentage of Total Revenue and Accounts Receivable as Percentage of Total Net Accounts Receivable (Details)	6 Months Ended	3 Months Ended	6 Months Ended			3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014
	Customer A	Customer B	Customer B	Customer B	Customer D	Customer C [Member]
	Revenue	Revenue	Revenue	Revenue	Accounts Receivable, Net	Revenue
Entity Wide Revenue Major Customer [Line Items]	'	'	'	'	'	'
Percentage representation of significant customers	14.00%	25.00%	10.00%	26.00%	20.00%	10.00%

Fair_Value_Measurements_Schedu

Fair Value Measurements - Schedule of Fair Value of Financial Assets (Detail) (Fair Value, Measurements, Recurring, USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2013
					Money Market Funds	Money Market Funds	Money Market Funds	Money Market Funds
							Level I	Level I
Financial Assets	'	'	'	'	'	'	'	'
Assets at fair value	'	'	'	'	$104,048,000	$14,029,000	$104,048,000	$14,029,000
Realized gains or losses on financial assets	$0	$0	$0	$0	'	'	'	'

Balance_Sheet_Components_Sched

Balance Sheet Components - Schedule of Inventory (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Abstract]	'	'
Raw materials	$10,542	$10,625
Finished goods	7,999	6,541
Total inventory	$18,541	$17,166

Balance_Sheet_Components_Sched1

Balance Sheet Components - Schedule of Property and Equipment, Net (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property Plant And Equipment [Line Items]	'	'
Property and equipment, gross	$32,484	$25,892
Less: accumulated depreciation and amortization	-20,539	-16,091
Total property and equipment, net	11,945	9,801
Equipment	'	'
Property Plant And Equipment [Line Items]	'	'
Property and equipment, gross	26,853	21,188
Software	'	'
Property Plant And Equipment [Line Items]	'	'
Property and equipment, gross	2,748	2,479
Leasehold Improvements	'	'
Property Plant And Equipment [Line Items]	'	'
Property and equipment, gross	1,756	1,325
Furniture and Fixtures	'	'
Property Plant And Equipment [Line Items]	'	'
Property and equipment, gross	858	777
Construction in Progress	'	'
Property Plant And Equipment [Line Items]	'	'
Property and equipment, gross	$269	$123

Balance_Sheet_Components_Sched2

Balance Sheet Components - Schedule of Deferred Revenue (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred Revenue Arrangement [Line Items]	'	'
Total deferred revenue	$45,842	$41,232
Less: current portion of deferred revenue	-31,315	-28,448
Deferred revenue, long-term	14,527	12,784
Products	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Total deferred revenue	2,175	3,170
Services	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Total deferred revenue	$43,667	$38,062

Balance_Sheet_Components_Accru

Balance Sheet Components - Accrued Liabilities (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Abstract]	'	'
Accrued compensation and benefits	$11,745	$9,015
Accrued tax liabilities	3,234	2,156
Other	4,666	4,343
Total accrued liabilities	$19,645	$15,514

Balance_Sheet_Components_Addit

Balance Sheet Components - Additional Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014
Property, Plant and Equipment [Abstract]	'	'	'	'	'
Depreciation and amortization property and equipment	$2,500,000	$1,700,000	$4,700,000	$3,100,000	'
Contractual liability	'	'	'	'	12,000,000
Payments related to settlement	5,000,000	'	'	'	'
Benefit to litigation expense	$6,993,000	'	$6,993,000	$0	'

Credit_Facility_Details

Credit Facility (Details) (USD $)

6 Months Ended

1 Months Ended

1 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Mar. 31, 2014

Sep. 30, 2013

Jun. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Letter of Credit

Alternate Base Rate

Alternate Base Rate

LIBOR

LIBOR

Federal Funds Rate

Eurodollar

Minimum

Minimum

Maximum

Line of Credit Facility [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument term

'

'

'

'3 years

'

'

'

'

'

'

'

'

Maximum borrowing capacity

'

'

'

$35,000,000

'

'

'

'

'

'

'

$10,000,000

Principal payments on revolving credit facility

20,000,000

10,000,000

20,000,000

'

'

'

'

'

'

'

'

'

Amount outstanding

'

'

'

'

0

'

'

'

'

'

'

'

Variable interest rate

'

'

'

'

'

2.50%

1.75%

2.75%

3.50%

0.50%

1.00%

'

Debt issuance costs

'

'

'

1,000,000

'

'

'

'

'

'

'

'

Unamortized debt issuance costs

'

'

'

'

$700,000

'

'

'

'

'

'

'

Quarterly facility fees

'

'

'

0.45%

'

'

'

'

'

'

'

'

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Details) (Parallel Networks, USD $)	Jun. 30, 2014
Parallel Networks	'
Loss Contingencies [Line Items]	'
Litigation reserve	$0

Equity_Award_Plans_Summary_of_

Equity Award Plans - Summary of Activity under Stock Option Plans (Details) (USD $)	0 Months Ended	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Jun. 30, 2014
Number of shares underlying outstanding options	'	'
Outstanding options, Beginning balance	9,971	9,971
Granted (in shares)	'	1,264
Exercised (in shares)	'	-1,050
Canceled (in shares)	'	-444
Outstanding options, Ending balance	'	9,741
Vested and expected to vest at end of period	'	9,284
Vested and exercisable (in shares)	'	4,697
Options Outstanding Weighted-average exercise price	'	'
Beginning balance (in dollars per share)	$4.14	$4.14
Granted (in dollars per share)	'	$13.36
Exercised (in dollars per share)	'	$2.54
Canceled (in dollars per share)	'	$5.71
Ending balance (in dollars per share)	'	$5.44
Vested and expected to vest at end of period (in dollars per share)	'	$5.27
Vested and exercisable at end of period (in dollars per share)	'	$2.73
Weighted-average remaining contractual term, beginning of the period	'7 years 10 months 24 days	'7 years 9 months 18 days
Weighted-average remaining contractual term, end of the period	'7 years 10 months 24 days	'7 years 9 months 18 days
Weighted average remaining contractual term, Vested and expected to vest at end of period	'	'7 years 8 months 12 days
Weighted average remaining contractual term, Vested and exercisable at end of period	'	'6 years 6 months
Aggregate Intrinsic Value, beginning of the period	$58,515	$58,515
Aggregate Intrinsic Value, end of the period	'	77,371
Aggregate Intrinsic Value, Vested and expected to vest at end of period	'	75,244
Aggregate Intrinsic Value, Vested and exercisable at end of period	'	$49,664

Equity_Award_Plans_Information

Equity Award Plans - Information About Stock Options (Details) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'
Total fair value of options granted	$7,536	$3,300
Weighted average fair value of options granted	$5.96	$2.59
Intrinsic value of options exercised	$8,818	$1,111

Equity_Award_Plans_Summary_of_1

Equity Award Plans - Summary of RSU activity (Details) (Restricted Stock Units (RSUs) [Member], USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Restricted Stock Units (RSUs) [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'
Outstanding at beginning of period (in shares)	0
Granted (in shares)	102
Released (in shares)	0
Canceled (in shares)	0
Outstanding at end of period (in shares)	102
Weighted Average Grant Date Fair Value	'
Outstanding at beginning of period (in dollars per share)	$0
Granted (in dollars per share)	$13.15
Released (in dollars per share)	$0
Canceled (in dollars per share)	$0
Outstanding at end of period (in dollars per share)	$13.15

Equity_Award_Plans_Summary_of_2

Equity Award Plans - Summary of Valuation Assumptions (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2014		Jun. 30, 2014		Jun. 30, 2013
Stock Options	'		'		'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'		'		'
Expected term (in years)	'5 years 6 months	[1]	'5 years 6 months	[1]	'6 years 29 days	[1]
Risk-free interest rate	1.73%	[1]	1.73%	[1]	1.12%	[1]
Expected volatility	45.00%	[1]	47.00%	[1]	46.00%	[1]
Dividend rate	0.00%	[1]	0.00%	[1]	0.00%	[1]
ESPP	'		'		'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'		'		'
Expected term (in years)	'1 year 5 months 1 day	[2]	'1 year 5 months 1 day	[2]	'
Risk-free interest rate	0.24%	[2]	0.24%	[2]	'
Expected volatility	31.00%	[2]	31.00%	[2]	'
Dividend rate	0.00%	[2]	0.00%	[2]	'
[1]	We did not grant stock options during the three months ended June 30, 2013
[2]	We did not have an ESPP plan prior to the adoption of our 2014 ESPP plan in March 2014.

Equity_Award_Plans_Schedule_of

Equity Award Plans - Schedule of Stock-based Compensation Awards Granted under Stock Option Plan in Consolidated Statements of Operations (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Stock-based compensation	$3,006	$864	$4,776	$1,727
Cost of Revenue	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Stock-based compensation	216	32	301	64
Sales and Marketing	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Stock-based compensation	1,457	471	2,341	945
Research and Development	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Stock-based compensation	944	268	1,407	529
General and Administrative	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Stock-based compensation	$389	$93	$727	$189

Equity_Award_Plans_Additional_

Equity Award Plans - Additional Information (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Options granted to employees and consultants	1,264,000
Total compensation expense related to unvested awards granted, not yet recognized	$17,500,000
Total compensation expense related to unvested awards granted, not yet recognized weighted-average period for recognition	'2 years 10 months 26 days
2014 Employee Stock Option Plan	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Additional shares reserved for future issuance	3,500,000
Percentage of outstanding shares of common stock	1.00%
Shares reserved for future issuance	1,600,000
Acquisition price at lower of fair market value, percentage	85.00%
Percentage of eligible compensation through payroll deductions	15.00%
Employee maximum number of shares per purchase period	1,500
Employee maximum number of Purchase value of stock per year	$25,000
Description of automatic increase in shares reserved for future issuance	'On the first day of each fiscal year, starting with January 1, 2015, the number of shares in the reserve will increase by the least of (i) 3,500,000 shares, (ii) 1% of the outstanding shares of our common stock on the last day of the immediately preceeding fiscal year, or (iii) such other amount as determined by our board of directors
Purchase limit of 2014 ESPP description	'Purchase limits of 1,500 shares during each six month purchase period or $25,000 worth of stock for each calendar year
Offering period description	'Each offering period will be approximately twenty-four months in duration, starting on the first trading day on or after May 21 and November 21 of each year, except for the first offering period, which commenced on March 21, 2014 and will end on the last trading day on or before May 20, 2016
2014 Stock Incentive Plan	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Number of shares authorized	7,700,000
Number of shares available for future grant	7,070,532
Options granted, exercisable term (in years)	'5 years
2014 Stock Incentive Plan | Stock Appreciation Rights (SARs)	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Additional shares reserved for future issuance	8,000,000
Percentage of outstanding shares of common stock	5.00%
Description of automatic increase in shares reserved for future issuance	'On the first day of each fiscal year, starting with January 1, 2015, the number of shares in the reserve will increase by the least of (i) 8,000,000 shares, (ii) 5% of the outstanding shares of common stock on the last day of our immediately preceding fiscal year, or (iii) such other amount as determined by our board of directors.
2014 Stock Incentive Plan | Employee Stock Option [Member]	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Options granted to employees and consultants	553,123
2014 Stock Incentive Plan | Restricted Stock Units (RSUs) [Member]	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Options granted to employees and consultants	102,265
2014 Stock Incentive Plan | Minimum	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Percentage of exercise price of fair value per share on grant date	110.00%
2014 Stock Incentive Plan | Minimum | Non Statutory Stock Option Award	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Percentage of exercise price of fair value per share on grant date	100.00%
2014 Stock Incentive Plan | Maximum	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Options granted, exercisable term (in years)	'10 years
Total combined voting power of all classes of stock	10.00%

Earnings_Per_Share_Summary_of_

Earnings Per Share - Summary of Computation of Basic and Diluted Net Loss Per Share (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Net loss attributable to common stockholders	($1,296)	($10,246)	($7,548)	($18,779)
Weighted-average shares outstanding used in computing basic and diluted net loss per share	59,711	9,144	36,712	9,075
Net loss per share attributable to common stockholders, basic and diluted	($0.02)	($1.12)	($0.21)	($2.07)

Earnings_Per_Share_Summary_of_1

Earnings Per Share - Summary of Outstanding Shares of Common Stock Equivalents (Detail)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share Diluted [Line Items]	'	'	'	'
Anti-dilutive securities excluded from computation of diluted net income per share	10,305	39,009	10,276	38,772
Convertible Preferred Stock	'	'	'	'
Earnings Per Share Diluted [Line Items]	'	'	'	'
Anti-dilutive securities excluded from computation of diluted net income per share	0	30,828	0	30,611
Stock Options to Purchase Common Stock	'	'	'	'
Earnings Per Share Diluted [Line Items]	'	'	'	'
Anti-dilutive securities excluded from computation of diluted net income per share	9,994	7,833	9,965	7,695
Common Stock Subject to Repurchase	'	'	'	'
Earnings Per Share Diluted [Line Items]	'	'	'	'
Anti-dilutive securities excluded from computation of diluted net income per share	311	348	311	377
Convertible Preferred Stock Warrants	'	'	'	'
Earnings Per Share Diluted [Line Items]	'	'	'	'
Anti-dilutive securities excluded from computation of diluted net income per share	0	0	0	89

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'	'	'	'	'
Income tax expense	$309,000	$158,000	$514,000	$379,000	'
Unrecognized tax benefits	$2,300,000	'	$2,300,000	'	$1,800,000

Segment_Information_Schedule_o

Segment Information - Schedule of Total Revenue Based on Customer's Location (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Total revenue	$45,132	$30,131	$90,877	$59,712
United States	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total revenue	26,215	10,303	44,428	20,876
Japan	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total revenue	8,471	11,644	25,775	24,042
Asia Pacific, excluding Japan	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total revenue	4,370	3,522	8,675	6,068
EMEA	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total revenue	3,925	3,276	8,065	4,929
Other	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total revenue	$2,151	$1,386	$3,934	$3,797

Segment_Information_Schedule_o1

Segment Information - Schedule of Long-lived Assets, Net by Location (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Segment Reporting Information [Line Items]	'	'
Total property and equipment, net and intangible assets, net	$13,011	$10,862
United States	'	'
Segment Reporting Information [Line Items]	'	'
Total property and equipment, net and intangible assets, net	10,605	8,599
Japan	'	'
Segment Reporting Information [Line Items]	'	'
Total property and equipment, net and intangible assets, net	380	572
Asia Pacific, excluding Japan	'	'
Segment Reporting Information [Line Items]	'	'
Total property and equipment, net and intangible assets, net	1,920	1,657
EMEA	'	'
Segment Reporting Information [Line Items]	'	'
Total property and equipment, net and intangible assets, net	$106	$34

Relatedparty_Transactions_Deta

Related-party Transactions (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Related Party Transactions [Abstract]	'	'	'	'	'
Revenue from related parties	$0.60	$1.60	$1.10	$2.60	'
Gross accounts receivable	$0.10	'	$0.10	'	$0.10