Meru Networks (MERU) 10-Q 30 Apr 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 24, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'MERU	'
Entity Registrant Name	'MERU NETWORKS INC	'
Entity Central Index Key	'0001167294	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	23,230,000

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
CURRENT ASSETS:	'	'
Cash and cash equivalents	$25,664	$30,938
Accounts receivable, net	10,226	17,088
Inventory	7,937	7,230
Prepaid expenses and other current assets	908	998
Total current assets	44,735	56,254
Property and equipment, net	2,455	2,451
Goodwill	1,658	1,658
Intangible assets, net	88	140
Other assets	1,972	1,934
TOTAL ASSETS	50,908	62,437
CURRENT LIABILITIES:	'	'
Accounts payable	4,356	6,139
Accrued liabilities	10,217	12,535
Long-term debt, current portion	3,858	3,718
Deferred revenue, current portion	13,164	13,730
Total current liabilities	31,595	36,122
Long-term debt, net of current portion	1,780	2,797
Deferred revenue, net of current portion	5,750	5,876
Other liabilities	1,511	1,387
Total liabilities	40,636	46,182
Commitments and contingencies (Note 9)	'	'
STOCKHOLDERS' EQUITY:	'	'
Preferred stock, $0.0005 par value - 5,000,000 shares authorized; no shares issued and outstanding as of March 31, 2014 and December 31, 2013	'	'
Common stock, $0.0005 par value - 150,000,000 shares authorized; 23,197,510 and 22,939,949 shares issued and outstanding as of March 31, 2014 and December 31, 2013	11	11
Additional paid-in capital	284,195	282,168
Accumulated other comprehensive loss	-501	-553
Accumulated deficit	-273,433	-265,371
Total stockholders' equity	10,272	16,255
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$50,908	$62,437

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]	'	'
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	23,197,510	22,939,949
Common stock, shares outstanding	23,197,510	22,939,949

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
REVENUES:	'		'
Products	$15,833		$20,590
Support and services	4,767		4,103
Ratable products and services	'		42
Total revenues	20,600		24,735
COSTS OF REVENUES:	'		'
Products	5,875		7,317
Support and services	1,902		1,776
Ratable products and services	'		22
Total costs of revenues	7,777	[1],[2]	9,115	[1],[2]
Gross margin	12,823		15,620
OPERATING EXPENSES:	'		'
Research and development	5,452	[1],[2]	3,688	[1],[2]
Sales and marketing	11,629	[1],[2]	11,420	[1],[2]
General and administrative	3,298	[1],[2]	3,285	[1],[2]
Total operating expenses	20,379		18,393
Loss from operations	-7,556		-2,773
Interest expense, net	-378		-610
Other expense, net	-16		-62
Loss before provision for income taxes	-7,950		-3,445
Provision for income taxes	112		138
Net loss	($8,062)		($3,583)
Net loss per share of common stock:	'		'
Basic and diluted	($0.35)		($0.18)
Shares used in computing net loss per share of common stock:	'		'
Basic and diluted	23,069,260		19,570,769
[1]	Includes stock-based compensation expense
[2]	This table includes $147,000 of stock-based compensation expense related to restructuring in the quarter ended March 31, 2014.

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Operations (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Stock-based compensation expense related to restructuring	$147		'
Costs of Revenues [Member]	'		'
Stock-based compensation expense	109	[1]	45	[1]
Research and Development [Member]	'		'
Stock-based compensation expense	338	[1]	158	[1]
Selling and Marketing [Member]	'		'
Stock-based compensation expense	811	[1]	537	[1]
General and Administrative [Member]	'		'
Stock-based compensation expense	$715	[1]	$714	[1]
[1]	This table includes $147,000 of stock-based compensation expense related to restructuring in the quarter ended March 31, 2014.

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'
Net loss	($8,062)	($3,583)
Other comprehensive income, net of tax:	'	'
Foreign currency translation adjustment	52	7
Other comprehensive income, net of tax	52	7
Comprehensive loss	($8,010)	($3,576)

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net loss	($8,062)	($3,583)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	416	378
Stock-based compensation	1,973	1,454
Accrued interest on long-term debt	214	302
Amortization of debt issuance costs	41	64
Bad debt expense	35	33
Changes in operating assets and liabilities:	'	'
Accounts receivable, net	6,825	4,937
Inventory	-707	705
Prepaid expenses and other assets	81	188
Accounts payable	-1,783	-104
Accrued liabilities	-2,121	-2,155
Deferred revenue	-692	-1,183
Net cash provided by (used in) operating activities	-3,780	1,036
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Purchase of property and equipment	-333	-156
Net cash used in investing activities	-333	-156
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from issuance of common stock, net of offering costs	'	12,556
Proceeds from exercise of stock options	164	191
Taxes paid related to net share settlement of equity awards	-406	-25
Repayment of long-term debt	-918	-814
Net cash provided by (used in) financing activities	-1,160	11,908
Effect of exchange rate changes on cash and cash equivalents	-1	-23
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-5,274	12,765
CASH AND CASH EQUIVALENTS - Beginning of period	30,938	22,855
CASH AND CASH EQUIVALENTS - End of period	25,664	35,620
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:	'	'
Cash paid for interest	191	294
Cash paid for income taxes	$135	$39

Business_and_Summary_of_Signif

Business and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Business and Summary of Significant Accounting Policies	'
	1. Business and Summary of Significant Accounting Policies
	Business — Meru Networks, Inc. (“Meru” or the “Company”) was incorporated in Delaware in January 2002. Meru and its wholly owned subsidiaries (collectively, the “Company”) develop and market a Wireless Local Area Network (“WLAN”) solution. The Company’s solution is built around its System Director Operating System which runs on its controllers and access points. The Company offers additional products designed to deliver network management, diagnostics and security. The Company also offers support services related to its products, professional services, and training. Products and services are sold through value added resellers, and distributors, as well as the Company’s sales force.
	Basis of Presentation — These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting and include the accounts of Meru and its wholly owned subsidiaries. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Accordingly, these unaudited interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013, filed on February 28, 2014. The condensed consolidated balance sheet as of December 31, 2013, included herein, was derived from the audited consolidated financial statements as of that date.
	The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and include all adjustments, consisting only of normal recurring adjustments, necessary for the fair presentation of the Company’s statement of financial position as of March 31, 2014 and December 31, 2013, the Company’s results of operations for the three months ended March 31, 2014 and 2013, comprehensive loss for the three months ended March 31, 2014 and 2013, and its cash flows for the three months ended March 31, 2014 and 2013. The results for the three months ended March 31, 2014 are not necessarily indicative of the results to be expected for the year ending December 31, 2014. All references to March 31, 2014 or to the three months ended March 31, 2014 and 2013 in the notes to the condensed consolidated financial statements are unaudited.
	Use of Estimates — The preparation of unaudited interim condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Such management estimates include litigation and settlement costs, other loss contingencies, sales returns and allowances, allowance for doubtful accounts, inventory valuation, reserve for warranty costs, valuation of deferred tax assets, stock-based compensation expense and fair value of warrants. The Company bases its estimates on historical experience and also on assumptions that it believes are reasonable. The Company assesses these estimates on a regular basis; however, actual results could materially differ from those estimates.
	Certain Significant Risks and Uncertainties — The Company is subject to certain risks and uncertainties that could have a material and adverse effect on the Company’s future financial position or results of operations. Many of these risks and uncertainties are described in “Risk Factors” in Part II, Item 1A of this Quarterly Report, which risks and uncertainties include, among others: the Company may experience fluctuations in its revenues and operating results, which makes it difficult to predict future results and which may cause its stock price to decline; the Company has a limited operating history; the Company could continue to incur operating losses throughout 2014; fluctuations in operating results could cause the price of the Company’s common stock to decline; the Company may be unable to raise additional funds or to do so on favorable terms; the Company competes in highly competitive markets and is subject to various competitive pressures; the Company may be unable to compete in a rapidly evolving market and to respond quickly and effectively to changing market requirements; the Company must hire, integrate and retain qualified personnel; the Company’s investments may not generate anticipated revenues; the Company’s products may contain defects or errors; the Company’s failure to provide high-quality support and services could have a material and adverse effect on its business and results of operations; the Company may be unable to increase market awareness of its brand and products and develop and expand its sales channels; the Company’s international operations subject the Company to additional risks; the Company’s failure to maintain effective systems of internal controls could affect the Company’s ability to produce accurate financial results; gross margins for the Company’s products and services may vary; others may claim that the Company infringes their intellectual property rights; the Company may be unable to protect its intellectual property rights; the continued development of demand for wireless networks is uncertain; the Company’s sales cycle is long and unpredictable and subject to seasonal fluctuation; the Company’s revenues may decline as a result in changes in public funds of educational institutions; the Company may be unable to forecast customer demand accurately in making purchase decisions; average sales prices for the Company’s products may decline; the Company relies on channel partners to generate a substantial majority of its revenues and these partners may fail to perform; the Company relies on third parties to manufacture its products and fulfill customer orders and the failure of these third parties to perform could have an adverse effect on the Company’s reputation and ability to manufacture and distribute products; and, the Company may be required comply with new or modified regulations or standards related to its products.
	Concentration of Supply Risk — The Company relies on third parties to manufacture its products, and depends on them for the supply and quality of its products. Quality or performance failures of the Company’s products or changes in its manufacturers’ financial or business condition could disrupt the Company’s ability to supply quality products to its customers and thereby have a material and adverse effect on its business and operating results. Some of the components and technologies used in the Company’s products are purchased and licensed from a single source or a limited number of sources. The loss of any of these suppliers may cause the Company to incur additional transition costs, result in delays in the manufacturing and delivery of its products, or cause it to carry excess or obsolete inventory and could cause it to redesign its products. The Company relies on third parties for the fulfillment of its customer orders, and the failure of these third parties to perform could have an adverse effect upon the Company’s reputation and its ability to distribute its products, which could adversely affect the Company’s business.
	Concentration of Credit Risk — Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents and accounts receivable. The Company maintains its cash and cash equivalents in fixed-income securities with financial institutions and invests in only high-quality credit instruments. Deposits held with banks may exceed the amount of insurance provided on such deposits. Credit risk with respect to accounts receivable in general is diversified due to the number of different entities comprising the Company’s customer base and their location throughout the world. The Company works with both large and small channel partners, and generally performs ongoing credit evaluations of those customers. The Company maintains reserves for estimated potential credit losses. As of March 31, 2014, four distributor customers accounted for 64% of the Company’s net accounts receivable. As of December 31, 2013, two distributor customers accounted for 53% of the Company’s net accounts receivable. The Company usually does not require collateral on accounts receivable. As of March 31, 2014 and December 31, 2013, the allowance for doubtful accounts was $63,000 and $28,000.
	Revenue Recognition — The Company’s revenues are derived primarily from hardware and software products and related support and services. The Company often enters into multiple deliverable arrangements and, as such, the elements of these arrangements are separated and valued based on their relative fair value. The majority of the Company’s products are networking communications hardware with embedded software components such that the software functions together with the hardware to provide the essential functionality of the product. Therefore, the Company’s hardware deliverables are considered to be non-software elements and are excluded from the scope of industry-specific software revenue recognition guidance. The Company’s products revenues also include revenues from the sale of stand-alone software products. Stand-alone software products may operate on the Company’s networking communications hardware, but are not considered essential to the functionality of the hardware. Sales of stand-alone software generally include a perpetual license to the Company’s software. Sales of stand-alone software continue to be subject to the industry-specific software revenue recognition guidance. Product support typically includes software updates on a when and if available basis, telephone and internet access to the Company’s technical support personnel and hardware support. Software updates provide customers with rights to unspecified software product upgrades and to maintenance releases and patches released during the term of the support period.
	Certain arrangements with multiple deliverables have stand-alone software elements that are subject to the existing software revenue recognition guidance along with non-software elements that are subject to the amended revenue accounting guidance. The revenue for these multiple deliverable arrangements is allocated to the stand-alone software elements as a group and to the non-software elements based on the relative selling prices of all of the elements in the arrangement using the fair value hierarchy in the amended revenue accounting guidance.
	For sales of stand-alone software, the Company uses the residual method to recognize revenue when an agreement includes one or more elements to be delivered at a future date and vendor specific objective evidence (“VSOE”) of all undelivered elements exists. The Company establishes VSOE for these arrangements based on sales of support services arrangements on a stand-alone basis. The normal pricing for multi-year support services arrangements is based on the normal price of a one year support services arrangement multiplied by the number of years of support services which is then adjusted for the time value of money and the decreased sales and fulfillment effort for support service periods of longer than one year. In the majority of the Company’s contracts, the only element that remains undelivered at the time of delivery of the software product is support services. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the contract fee is recognized as product revenues. If evidence of the fair value of one or more undelivered elements does not exist, all revenue is generally deferred and recognized when delivery of those elements occurs or when fair value can be established. When the undelivered element for which the Company does not have VSOE is support, revenue for the entire arrangement is bundled and recognized ratably over the support period.
	VSOE for elements of an arrangement is based upon the normal pricing and discounting practices for those services when sold separately. In determining VSOE, the Company requires that a substantial majority of the selling prices for an element falls within a reasonably narrow pricing range, generally evidenced by a substantial majority of such historical stand-alone transactions falling within a reasonably narrow range of the median rates.
	Third-party evidence (“TPE”) of selling price is determined based on competitor prices for similar deliverables when sold separately. However, the Company is typically not able to determine TPE for its products or services. Generally, the Company’s go-to-market strategy differs from that of its peers and the Company’s offerings contain a significant level of differentiation such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, the Company is unable to reliably determine the selling prices for similar products from competitors on a stand-alone basis. The Company establishes estimated selling prices (“ESP”) for support services based on its normal pricing and discounting practices for support services. This ESP analysis requires that a substantial majority of the support services selling prices fall within a reasonably narrow pricing range, which is typically broader than the range used to evidence VSOE. The Company believes that this is the price at which it would sell support services if support services were regularly sold on a stand-alone basis.
	When the Company is unable to establish the selling price of its non-software elements using VSOE or TPE, the Company uses ESP in its allocation of arrangement consideration. The objective of ESP is the estimated price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. The Company determines ESP for a product or service by considering multiple factors including, but not limited to, pricing policies, internal costs, gross margin objectives and discount from the list prices.
	The Company regularly reviews VSOE and ESP and maintains internal controls over the establishment and updates of these estimates. There was not a material impact from changes in VSOE or ESP during the quarters ended March 31, 2014 and 2013, nor does the Company currently expect a material impact in the near term, from changes in VSOE or ESP.
	The Company recognizes revenues when all of the following have occurred: (1) the Company has entered into a legally binding arrangement with a customer; (2) delivery has occurred; (3) customer payment is deemed fixed or determinable and free of contingencies and significant uncertainties; and (4) collection is probable. The sales prices for the Company’s products are typically considered to be fixed or determinable at the inception of an arrangement. Delivery is considered to have occurred when product title has transferred to the customer, when the service or training has been provided, when software is delivered, or when the support period has lapsed. To the extent that agreements contain rights of return or acceptance provisions, revenues are deferred until the acceptance provisions or rights of return lapse.
	The majority of the Company’s sales are generated through its distributors. Revenues from distributors with return rights are recognized when the distributor reports that the product has been sold through, provided that all other revenue recognition criteria have been met. The Company obtains sell-through information from these distributors. For transactions with other distributors, the Company does not provide for rights of return and recognizes products revenues at the time of shipment, assuming all other revenue recognition criteria have been met. Sales to certain distributors were made pursuant to price discounts based on certain criteria and the Company accrued the estimated price discount as a reduction to both accounts receivable and net revenues.
	Revenues for support services are recognized on a straight-line basis over the support period, which typically ranges from one year to five years.
	Shipping charges billed to customers are included in products revenues and the related shipping costs are included in costs of products revenues.
	Impairment of Long-Lived Assets—The Company evaluates its long-lived assets for indicators of possible impairment when events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Impairment exists if the carrying amounts of such assets exceed the estimates of future net undiscounted cash flows expected to be generated by such assets. Should impairment exist, the impairment loss would be measured based on the excess carrying value of the asset over the asset’s estimated fair value. The Company did not write down any of its long-lived assets as a result of impairment during the three months ended March 31, 2014 and 2013.
	Goodwill—Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. The Company reviews goodwill for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value may not be recoverable. The Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step quantitative goodwill impairment test. If, after assessing the totality of circumstances, an entity determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, then it is required to perform the two-step impairment test. It does not require an entity to calculate the fair value of a reporting unit unless the entity determines that it is more likely than not that its fair value is less than its carrying value. However, an entity also has the option to bypass the qualitative assessment for any reporting unit in any period and proceed directly to performing the first step of the two-step goodwill impairment test. The Company has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. As the Company uses the market approach to assess impairment, its common stock price is an important component of the fair value calculation. If the Company’s stock price continues to experience significant price and volume fluctuations, this will impact the fair value of the reporting unit and can lead to potential impairment in future periods. The Company performed its annual impairment test in June 2013 and determined that its goodwill was not impaired. As of March 31, 2014, the Company had not identified any factors that indicated there was an impairment of its goodwill and determined that no additional impairment analysis was then required.
	Loss Contingencies—The Company is or has been subject to proceedings, lawsuits and other claims arising in the ordinary course of business. The Company evaluates contingent liabilities, including threatened or pending litigation, for potential losses. If the potential loss from any claim or legal proceedings is considered probable and the amount can be estimated, the Company accrues a liability for the estimated loss. Because of uncertainties related to these matters, accruals are based upon the best information available. For potential losses for which there is a reasonable possibility (meaning the likelihood is more than remote but less than probable) that a loss exists, the Company will disclose an estimate of the potential loss or range of such potential loss or include a statement that an estimate of the potential loss cannot be made. As additional information becomes available, the Company reassesses the potential liability related to pending claims and litigation and may revise its estimates, which could materially impact its condensed consolidated financial statements.
	Warranty — The Company provides a warranty on products and estimated warranty costs are recorded during the period of sale. The Company establishes warranty reserves based on estimates of product warranty return rates and expected costs to repair or to replace the products under warranty. The warranty provision is recorded as a component of costs of products revenues in the condensed consolidated statements of operations.
	Accrued warranty, which is included in accrued liabilities on the condensed consolidated balance sheets, as of March 31, 2014 is as follows (in thousands):
		March 31,
		2014
	Accrued warranty balance — January 1, 2014	$	1,345
	Warranty costs incurred		(25	)
	Provision for warranty		122
	Accrued warranty balance — March 31, 2014	$	1,442

Inventory

Inventory	3 Months Ended
	Mar. 31, 2014
Inventory Disclosure [Abstract]	'
Inventory	'
	2. Inventory
	Inventory as of March 31, 2014 and December 31, 2013 is as follows (in thousands):
		March 31,		December 31,
		2014		2013
	Finished goods	$	7,383	$	6,692
	Channel inventory		554		538
	Inventory	$	7,937	$	7,230

Net_Loss_Per_Share_of_Common_S

Net Loss Per Share of Common Stock	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Net Loss Per Share of Common Stock	'
	3. Net Loss Per Share of Common Stock
	The Company’s basic net loss per share of common stock is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding for the period. The weighted-average number of shares of common stock used to calculate the Company’s basic net loss per share of common stock excludes stock awards prior to vesting and also those shares subject to repurchase related to stock options that were exercised prior to vesting as these shares are not deemed to be issued for accounting purposes until they vest. The diluted net loss per share of common stock is calculated by giving effect to all potential common stock equivalents outstanding for the period determined using the treasury-stock method. For purposes of the diluted shares outstanding calculation, restricted stock units, stock options to purchase common stock, and warrants to purchase common stock are considered to be common stock equivalents. In periods in which the Company has reported a net loss, the common stock equivalents have been excluded from the calculation of diluted net loss per share of common stock as their effect is antidilutive under the treasury stock method.
	The following outstanding shares of common stock and common stock equivalents were excluded from the computation of diluted net loss per share of common stock for the periods presented because including them would have been antidilutive:
			Three Months Ended
			March 31,
			2014		2013
	Stock awards and stock options to purchase common stock *			5,002,818		4,720,468
	Common stock warrants			468,293		3,192,250
	*	Includes 195,370 and 185,386 shares, which were expected to be issued pursuant to the Company’s Employee Stock Purchase Plan as of March 31, 2014 and 2013, respectively, based on employee enrollment.

Cost_Reduction_Program

Cost Reduction Program	3 Months Ended
	Mar. 31, 2014
Restructuring And Related Activities [Abstract]	'
Cost Reduction Program	'
	4. Cost Reduction Program
	During the three months ended March 31, 2014, the Company consolidated certain functions which resulted in a restructuring cost of $0.7 million. As part of the plan, the Company eliminated approximately 18 positions worldwide in its research and development, sales and marketing and general and administrative functions. The restructuring costs consist primarily of severance expenses. The majority of the affected employees departed by March 31, 2014. The Company recorded the restructuring expenses in the condensed consolidated statements of operations as follows (in thousands):
		Three Months Ended
		March 31, 2014
	Research and development	$	43
	Sales and marketing		469
	General and administrative		223
	Total restructuring expenses	$	735
	The following table provides a summary of the restructuring activities included in accrued liabilities during the three months ended March 31, 2014 (in thousands):
					Other Exit-
		Severance			Related Costs			Total
	Balance at January 1, 2014	$	—		$	—		$	—
	Restructuring expenses		705			30			735
	Cash payments		(156	)		(5	)		(161	)
	Stock-based compensation		(147	)		—			(147	)
	Balance at March 31, 2014	$	402		$	25		$	427
	The restructuring costs include $147,000 of stock-based compensation expense resulting from the acceleration of vesting of 59,000 restricted stock units to two affected employees.
	The balance at March 31, 2014 represents remaining estimated costs for activities that have incurred, but have yet to be paid, as a result of the restructuring. Payments for the remaining $0.4 million are expected to be paid by March 31, 2015.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	5. Fair Value of Financial Instruments
	As a basis for determining the fair value of certain of the Company’s assets and liabilities, the Company established a three-tier value hierarchy which prioritizes the inputs used in measuring fair value as follows: (Level I) observable inputs such as quoted prices in active markets; (Level II) inputs other than the quoted prices in active markets that are observable either directly or indirectly; and (Level III) unobservable inputs in which there is little or no market data and that require the Company to develop its own assumptions. This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. The Company’s financial assets that are measured at fair value on a recurring basis consist of cash equivalents. The Company did not have any financial liabilities that are measured at fair value on a recurring basis as of March 31, 2014 and December 31, 2013.
	Level I instrument valuations are obtained from quotes for transactions in active exchange markets involving identical assets. The Company’s cash equivalents are valued using market prices on active markets (Level I). Pricing is provided by third party sources of market information obtained through the Company’s investment advisors rather than models. The Company does not adjust for or apply any additional assumptions or estimates to the pricing information it receives from its advisors. The Company considers this the most reliable information available for the valuation of the securities. The Company had no transfers between Level I and Level II during the three months ended March 31, 2014 and December 31, 2013.
	As of March 31, 2014, the Company’s fair value hierarchy for its financial assets was as follows (in thousands):
		March 31, 2014
		Quoted Prices in Active		Significant Other		Significant		Total
		Markets for Identical		Observable		Unobservable		Fair Value
		Instruments		(Level II)		(Level III)
		(Level I)
	Assets:
	Money market funds	$	15,085	$	—	$	—	$	15,085
	As of December 31, 2013, the Company’s fair value hierarchy for its financial assets was as follows (in thousands):
		December 31, 2013
		Quoted Prices in Active		Significant Other		Significant		Total
		Markets for Identical		Observable		Unobservable		Fair Value
		Instruments		(Level II)		(Level III)
		(Level I)
	Assets:
	Money market funds	$	15,084	$	—	$	—	$	15,084

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	6. Goodwill and Intangible Assets
	On August 31, 2011, the Company acquired all of the outstanding shares of Identity Networks (“Identity”), a privately-owned provider of complete guest and device access management solutions located in the United Kingdom. The Company recorded $1.7 million goodwill as a consequence of that acquisition.
	Intangible assets acquired are accounted for based on the fair value of assets purchased and are amortized over the period in which economic benefit is estimated to be received. Identifiable intangible assets were as follows (in thousands):
		As of March 31, 2014
		Estimated		Gross		Accumulated			Net
		Useful Life		Value		Amortization			Value
	Developed technology		3 years	$	630	$	(542	)	$	88
	Total			$	630	$	(542	)	$	88
		As of December 31, 2013
		Estimated		Gross		Accumulated			Net
		Useful Life		Value		Amortization			Value
	Developed technology		3 years	$	630	$	(490	)	$	140
	Customer relationships		2 years		160		(160	)		—
	Total			$	790	$	(650	)	$	140
	The Company recorded amortization expense related to these identified intangible assets in the condensed consolidated statements of operations as follows (in thousands):
		Three Months Ended March 31,
		2014		2013
	Costs of products revenues	$	52	$	52
	Sales and marketing		—		20
	Total amortization expense	$	52	$	72
	As of March 31, 2014, the estimated aggregate future amortization expense in future years is as follows (in thousands):
	Fiscal Years:
	2014 (remainder)	$	88
	Total	$	88

Cost_Method_Investments

Cost Method Investments	3 Months Ended
	Mar. 31, 2014
Investments Debt And Equity Securities [Abstract]	'
Cost Method Investments	'
	7. Cost Method Investments
	During the year ended December 31, 2011, the Company invested $1.3 million in a company which is developing value-added applications that are designed to allow its customers to achieve greater benefit from wireless networks such as those offered by the Company. The investment of $1.3 million is included in other assets in the condensed consolidated balance sheets as of March 31, 2014 and December 31, 2013. The investee was co-founded by Dr. Vaduvur Bharghavan, a co-founder of the Company who served as a member of the Company’s board of directors until May 2012.
	Equity investments, especially equity investments in private companies are inherently risky. Many factors, including technical and product development challenges, market acceptance, competition, additional funding availability and the overall economy, could cause the investment to be impaired. The Company monitors the indicators of impairment of its investments. In the event that the fair value of an investment is below its carrying value and the impairment is other-than-temporary, the Company writes down the investment to its fair value. There were no indicators of impairment during the three months ended March 31, 2014 and 2013. The Company has not elected to use the fair value method for this investment.

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Borrowings	'
	8. Borrowings
	In June 2012, the Company entered into a loan and security agreement (the “VLL Agreement”), with Venture Lending and Leasing VI, Inc. (“VLL”), pursuant to which VLL made a term loan to the Company in the aggregate principal amount of $12 million. The Company received proceeds of $11.7 million, less issuance costs paid of $162,000. The VLL Agreement is collateralized by substantially all assets and intellectual property of the Company and contains various covenants that include limitations, among others, on the Company’s ability to incur additional indebtedness; its ability to acquire, merge or consolidate with other businesses; and its ability to pay dividends on its equity securities. As of March 31, 2014, the Company was in compliance with all of its loan covenants.
	The VLL Agreement bears interest at an annual fixed rate of 12%, and is payable in 39 equal installments, including principal and interest, of $369,405 per month. In addition, the Company is required to make a payment of $2.0 million on the earlier of a change of control or September 1, 2015, which is the maturity date of the VLL Agreement. The Company recorded $0.2 million as additional interest expense during each of the three months ended March 31, 2014 and 2013 related to the $2.0 million payment. The Company will continue to accrue the balance of the $2.0 million cash payment over the remaining term of the loan using the effective interest rate method, unless a change of control occurs, at which time the full amount will become due and payable.
	The Company may voluntarily prepay all but not less than the total outstanding principal balance plus interest at any time, provided the Company is not then in default, subject to prepayment penalties. A prepayment penalty in the amount of 100% of the remaining scheduled but unpaid interest through the maturity date is due if the prepayment occurs before January 1, 2014. A prepayment penalty in the amount of 80% of the remaining scheduled but unpaid interest through the maturity date is due if the prepayment is made on or after January 1, 2014.
	In connection with the VLL Agreement, the Company issued Venture Lending & Leasing, LLC a warrant to purchase 468,293 shares of the Company’s common stock. The warrant was exercisable upon issuance, has an exercise price of $2.05 per share, and expires on June 1, 2017. Upon issuance, the relative fair value of the warrant was recorded as a debt discount on the consolidated balance sheet in the amount of $384,000. In addition, debt issuance costs of $162,000 were also recorded as a debt discount. The aggregate total of the debt discounts of $546,000 is being amortized to interest expense over the repayment period for the loan using the effective interest rate method. The Company recorded $41,000 and $64,000 to interest expense, net related to the debt discounts during the three months ended March 31, 2014 and 2013. As of March 31, 2014, the remaining unamortized amount of the debt discounts was $110,000 of which $105,000 was classified as a current debt discount.
	The scheduled principal payments for the Company’s long-term debt under the VLL Agreement as of March 31, 2014 are as follows (in thousands):
		Long-term Debt
	Fiscal Years:
	2014 (remainder)	$	2,921
	2015		2,827
	Total		5,748
	Less: unamortized discounts		(110	)
	Less: current portion		(3,858	)
	Long-term debt, net of current portion	$	1,780

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	9. Commitments and Contingencies
	Operating Leases — The Company leases approximately 44,000 square feet office space for its headquarters in Sunnyvale, California under a noncancelable operating lease that expires in 2015. In addition, the Company leases approximately 35,000 square feet space for a research and development facility in Bangalore, India pursuant to an operating lease that expires in 2016, which is noncancelable prior to the year-ending December 31, 2014. The Company has the option to renew the lease for an additional five years. The Company also leases office space for sales offices and test facilities in multiple locations around the world under noncancelable operating leases that expire at various dates. Commitments under these operating leases are as follows (in thousands):
		Operating Leases
	Fiscal Years:
	2014 (remainder)	$	1,212
	2015		498
	2016		129
	Total	$	1,839
	Other commitments as of March 31, 2014 totaled approximately $6.2 million and consisted of inventory and other noncancelable purchase obligations.
	Litigation — The Company is subject to various claims arising in the ordinary course of business. Although no assurance may be given, the Company believes that it is not presently a party to any litigation of which the outcome, if determined adversely, would individually or in the aggregate be reasonably expected to have a material and adverse effect on the business, operating results, cash flows or financial position of the Company. The Company records litigation accruals for legal matters which are both probable and estimable. For legal proceedings for which there is a reasonable possibility of loss (meaning those losses for which the likelihood is more than remote but less than probable), the Company has determined that it does not have material exposure, or it is unable to develop a range of reasonably possible losses.
	In May 2011, Linex Technologies, Inc. (“Linex”) filed suit against the Company and Hewlett-Packard, Apple, Aruba Networks, and Ruckus Wireless in the United States District Court for the District of Delaware, asserting infringement of U.S. Patents No. 6,757,322 (“322 patent”) and RE42,219 (“219 patent”). On June 2, 2011, the United States International Trade Commission (“ITC”) instituted a Section 337 Investigation, based on Linex’s complaint that the 322 and 219 patents are infringed by 802.11n products imported and sold by the Company and by Hewlett-Packard, Apple, Aruba Networks, and Ruckus Wireless. The case in Delaware was stayed due to the pending ITC Investigation. Linex subsequently withdrew its ITC complaint and moved to lift the stay of the Delaware litigation, which was not opposed by the defendants and which was granted by the Delaware court. On December 12, 2012, Linex amended its complaint to add a third patent, U.S. Patent No. RE43,812 (“812 patent”). The defendants filed a motion to transfer the case to the Northern District of California, which was granted by the Delaware court on January 7, 2013. The case is now pending before the Honorable Claudia Wilken, and trial has been set for July 28, 2014. The Company filed responsive Markman brief and dispositive motions on December 9, 2013. A court-ordered mediation session was held on December 20, 2013 and a settlement was not reached during the mediation. The court held a Markman hearing on January 23, 2014. Discovery is completed but there are unresolved questions of fact and law, including those with respect to claim construction, validity and infringement. In light of these unresolved factual and legal issues, while a loss is reasonably possible, the amount of any potential loss cannot be estimated. At this stage, the Company is unable to predict the outcome of this matter and, accordingly, cannot estimate the potential financial impact this action could have on its business, operating results, cash flows or financial position.
	On August 15, 2012, ReefEdge Networks, LLC (“ReefEdge”) filed suit against the Company and CDW (an IT reseller) and filed suits separately against CDW and various other defendants, including Cisco Systems, Aruba Networks, Dell Computer, and Ruckus Wireless in the United States District Court of Delaware, asserting infringement of U.S. Patent No. 6,633,761; U.S. Patent No. 6,975,864; and U.S. Patent No. 7,197,308. We filed our answer to the complaint on October 8, 2012. The case is now pending before the Honorable Leonard P. Stark. On April 29, 2013, Brocade Communications Systems tendered a request to the Company for indemnity in a related case (ReefEdge Networks v. Motorola Solutions and Brocade Communications) before the same judge in Delaware, based on our sales to Brocade and its predecessors in interest. We have accepted Brocade’s request. The court has scheduled a claim construction hearing for April 18, 2014. The court has not yet set a trial date. Discovery is ongoing, and there are unresolved questions of fact and law, including those with respect to claim construction, validity and infringement. Additionally, no case-dispositive motions have been filed. In light of these unresolved factual and legal issues, while a loss is reasonably possible, the amount of any potential loss cannot be estimated. At this stage, the Company is unable to predict the outcome of this matter and, accordingly, cannot estimate the potential financial impact this action could have on its business, operating results, cash flows or financial position.
	Third parties have from time to time claimed, and others may claim in the future that the Company has infringed their past, current or future intellectual property rights. These claims, whether meritorious or not, could be time-consuming, result in costly litigation, require expensive changes in the Company’s methods of doing business or could require the Company to enter into costly royalty or licensing agreements, if available. As a result, these claims could harm the Company’s business, operating results, cash flows and financial position.
	Indemnifications — The Company’s customer agreements generally include certain provisions for indemnifying such customers against certain liabilities, including if the Company’s products infringe a third party’s intellectual property rights. From time to time, the Company receives requests for indemnification from its customers. The Company reviews these requests on a case-by-case basis and may choose to assume the defense of such litigation asserted against its customers as the Company has done with Brocade. The Company has agreed in certain circumstances to indemnify certain suppliers and service providers in connection with liabilities they may incur in connection with the provision of services to the Company. To date, the Company has not incurred any material costs as a result of such indemnification provisions and has not accrued any liabilities related to such obligations in the accompanying condensed consolidated financial statements.
	In addition, the Company’s bylaws provide that we shall indemnify our directors, officers, employees and agents to the extent such person becomes a party or is threatened to become a party to litigation or other proceedings arise by reason of their service to the Company, subject to certain limitations. In addition, the Company has entered into indemnification agreements or other contractual arrangements with current and former executive officers and directors of the Company which contain provisions that may require the Company, among other things, to indemnify such officers and directors against certain liabilities that may arise by reason of their status or service as directors or officers and to advance their expenses incurred as a result of any proceeding against them as to which they could be indemnified. The Company also maintains director and officer insurance, which may cover certain liabilities arising from its obligation to indemnify its directors and officers.
	In the event that one or more of these matters were to result in a claim against the Company, an adverse outcome, including a judgment or settlement, may cause a material adverse effect on the Company’s future business, operating results or financial condition. It is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement.
	From time to time, the Company may receive indemnification claims in the normal course of business. The Company does not believe it is party to any currently pending claims the outcome of which will have a material adverse effect on its operations or financial position.

Common_Stock

Common Stock	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Common Stock	'
	10. Common Stock
	Sale of Common Stock
	On February 27, 2013, the Company entered into an Underwriting Agreement (the “Underwriting Agreement”) with William Blair & Company, L.L.C (the “Underwriter”), pursuant to which the Company agreed to offer and sell 3,000,000 shares of its common stock with a par value of $0.0005 per share, at a price of $4.00 per share (the “Offering”). Under the terms of the Underwriting Agreement, the Company granted the Underwriters a 30-day option to purchase an additional 450,000 shares of the Company’s common stock to cover overallotments, which the Underwriter exercised on March 4, 2013. The Company completed the sale of 3,450,000 shares of its common stock and received $12.6 million in proceeds, net of underwriting discount, commission and other issuance costs, on March 4, 2013, which was the closing date of the Offering.
	Warrants for Common Stock
	The Company issued a warrant to purchase 468,293 shares of the Company’s common stock in connection with the VLL Agreement entered into in June 2012. The warrant was exercisable upon issuance, has an exercise price of $2.05 per share, and expires on June 1, 2017. Upon issuance, the Company determined the fair value using the Black-Scholes option-pricing model with the following assumptions:
		June 2012
	Dividend rate	0%
	Risk-free interest rate	0.70%
	Expected life (in years)	5
	Expected volatility	59.10%
	The relative fair value of the warrant was recorded as a debt discount on the consolidated balance sheet in the amount of $384,000. As of March 31, 2014, this warrant has not been exercised and was still outstanding.
	In 2009, the Company issued warrants to purchase 4,007,432 shares of common stock. During 2010, the Company issued another warrant to purchase 36,582 shares of common stock as a result of the exercise of a Series E warrant. These common stock warrants were exercisable, had exercise prices ranging from $9.78 to $11.74. During the years ended 2011 and 2010, warrants to purchase 1,265,293 and 54,764 shares were exercised utilizing a cashless exercise provision. As a result, the Company issued 548,125 shares and 19,072 shares of common stock. There were no exercises since 2011. The remaining warrants to purchase 2,723,957 shares of common stock expired unexercised on March 12, 2014.

Equity_Incentive_Plans

Equity Incentive Plans	3 Months Ended
	Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Equity Incentive Plans	'
	11. Equity Incentive Plans
	The Company’s equity incentive plans are broad-based retention programs. The plans are intended to attract talented employees, directors and non-employee consultants.
	2013 New Employee Stock Inducement Plan
	On June 6, 2013, the Company’s Board of Directors approved the Company’s 2013 New Employee Stock Inducement Plan (the “2013 Plan”), under which 500,000 shares of common stock were reserved for issuance. The 2013 Plan is designed to attract new employees by providing for awards in the form of restricted stock units, restricted stock awards, stock options (which shall be nonstatutory stock options) or stock appreciation rights. As of March 31, 2014, 315,000 shares of restricted stock units were issued and outstanding and 185,000 shares of common stock were available for future issuance under the 2013 Plan.
	Inducement Plan and Agreement and Restricted Stock Unit Plan and Agreements with Chief Executive Officer
	In March 2012, the Company granted options to purchase 600,000 shares of common stock under the Inducement Stock Option Plan and Agreement, 50,000 shares of restricted stock units under the Service-Based Restricted Stock Unit Plan and Agreement and 50,000 shares of restricted stock units under the Performance-Based Restricted Stock Unit Plan and Agreement, to Dr. Bami Bastani, Chief Executive Officer (“CEO”), as a material inducement to the acceptance of employment with the Company. The grants were approved by the Company’s board of directors, as specified under the Listing Rules of the Nasdaq Stock Market. As of March 31, 2014, options to purchase 600,000 shares of common stock were issued and outstanding under the Inducement Stock Option Plan and Agreement and a total of 45,000 shares of restricted stock units were issued and outstanding under the Restricted Stock Unit Plans and Agreements.
	Stock Incentive Plans
	In March 2010, the Company’s board of directors and its stockholders approved the 2010 Stock Incentive Plan (the “2010 Plan”), effective upon the completion of the Company’s initial public offering (“IPO”) on April 6, 2010. The 2010 Plan provides for the granting of stock options, restricted stock, restricted stock units and stock appreciation rights. The number of shares reserved for issuance under the 2010 Plan is increased on the first day of each of the Company’s fiscal years by the lesser of 4% of the Company’s outstanding common stock on the last day of the immediately preceding fiscal year or the number of shares determined by the Company’s board of directors.
	The Company’s stock-based compensation expense was $2.0 million and $1.5 million during the three months ended March 31, 2014 and 2013, respectively. As of March 31, 2014 and December 31, 2013, the Company had accrued $0.3 million and $0.6 million, respectively, in accrued liabilities on the consolidated balance sheets for awards that were earned but not issued as of the balance sheet date.
	Determining Fair Value of Stock Options
	The fair value of stock options granted during the three months ended March 31, 2014 and 2013 were determined by the Company using the methods and assumptions discussed below. Each of these inputs is subjective and generally requires significant judgment to determine.
	Valuation Method—The Company estimates the fair value of stock options granted using the Black-Scholes option-pricing model.
	Expected Term— The expected term represents the period that the Company’s stock-based awards are expected to be outstanding. The expected term is derived from historical data on employee exercises and post-employment exercises taking into account the contractual life of the award.
	Expected Volatility—The expected volatility was calculated using the historical stock volatilities of the Company’s historical data over a period based on the expected terms of the options.
	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 Dividend—The Company has never paid dividends and does not expect to pay dividends.
	Forfeiture Rate—The Company estimates its forfeiture rate based on an analysis of its actual forfeitures and will continue to evaluate the adequacy of the forfeiture rate based on actual forfeiture experience, analysis of employee turnover, and other factors. The impact from a forfeiture rate adjustment will be recognized in full in the period of adjustment, and if the actual number of future forfeitures differs from that estimated by the Company, the Company may be required to record adjustments to stock-based compensation expense in future periods.
	Summary of Assumptions — The Company did not grant any stock options during the three months ended March 31, 2014. The fair value of each employee stock option was estimated at the date of grant using a Black-Scholes option-pricing model, with the following weighted-average assumptions for grants of options during the three months ended March 31, 2013:
		Three Months Ended
		March 31, 2013
	Dividend rate	0%
	Risk-free interest rate	0.60%
	Expected life (in years)	4.1
	Expected volatility	70.70%
	A summary of the Company’s stock award activity during the three months ended March 31, 2014 is presented below:
													Weighted-
									Weighted-				Average				Aggregate
		Shares			Number				Average				Remaining				Intrinsic
		Available			of Stock Options				Exercise				Contractual				Value
		for Grant			Outstanding				Price				Life (Years)				(in thousands)
	Outstanding — January 1, 2014		2,232,803			2,833,578			$	4.68				7.9			$	1,907
	Additional options authorized		917,598			—				—
	Restricted stock granted		(980,021	)		—				—
	Cancelled options		160,362			(160,362	)			4.86
	Restricted stock returned		187,948			—				—
	Exercised options		—			(57,322	)			2.86
	Outstanding — March 31, 2014		2,518,690			2,615,894			$	4.71				7.6			$	1,975
	Vested and expected to vest — March 31, 2014					2,113,252			$	4.85				7.4			$	1,618
	Vested — March 31, 2014					1,399,470			$	5.55				6.9			$	810
	The aggregate intrinsic value of options exercised was $89,000 and $47,000 for the three months ended March 31, 2014 and 2013, determined as of the date of option exercise.
	Additional information regarding the Company’s stock options outstanding and vested as of March 31, 2014 is summarized below:
		Options Outstanding									Options Vested and Exercisable
					Weighted-Average		Weighted-								Weighted-
					Remaining		Average								Average
					Contractual Life		Exercise								Exercise
	Exercise Prices	Shares			(Years)		Price per Share				Shares				Price per Share
	$0.91 - $2.17		286,029		7.9		$	1.66				123,543			$	1.62
	$2.18 - $4.33		1,053,469		8.2		$	3.41				409,707			$	3.4
	$4.34 - $6.50		883,525		7.6		$	4.86				488,620			$	4.86
	$6.51 - $19.51		392,871		5.8		$	10.08				377,600			$	10.05
			2,615,894		7.6		$	4.71				1,399,470			$	5.55
	As of March 31, 2014, total compensation cost related to unvested stock-based awards granted to employees, but not yet recognized, was $9.1 million, net of estimated forfeitures. This cost will be amortized on a straight-line basis over a weighted-average remaining period of 2.2 years and will be adjusted for subsequent changes in estimated forfeitures. Future option grants increase the amount of compensation expense that will be recorded.
	Exchange Offer—On July 26, 2012, the Company commenced an offer to eligible employees to exchange options to purchase shares of the Company’s common stock outstanding on July 26, 2012, (a) which had an exercise price greater than $2.00 per share (the “Eligible Options”), (b) that were granted under the Company’s 2002 Stock Incentive Plan or the 2010 Plan, and (c) that did not vest upon the achievement of certain performance criteria (“Eligible Options”). The Company’s CEO and its non-employee directors were not eligible to participate in the offer. Eligible Options tendered were exchanged for an equal number of new nonqualified stock options to be granted under the 2010 Plan (the “New Options”) following the expiration of the offer; provided, however, that certain eligible officers received a lesser number of New Options, depending on the exercise price of the Eligible Options they tendered. Options to purchase 960,443 shares of common stock (the “Exchanged Options”) were cancelled and exchanged for options to purchase 692,682 shares of common stock with a new vesting schedule of 25% vest after the first year of service, and ratably monthly over the remaining 36 months contingent upon continued employment with the Company on the date of vest. The offer expired on August 22, 2012. The New Options were granted following the expiration of the offer with an exercise price of $3.40 per share, which was the closing price of the Company’s stock as reported by the Nasdaq Global Market on August 23, 2012. This modification resulted in an incremental charge of $0.5 million, which is being amortized over the 4-year vesting period of the New Options in addition to the unamortized expense related to the Exchanged Options.
	Restricted Stock Awards and Restricted Stock Units— The Company has issued restricted stock awards (“RSAs”) and restricted stock units (“RSUs”) to employees and members of the board of directors. These restricted shares have vesting periods ranging from immediate vesting to four years from the date of issuance and vesting is subject to the recipient continuing to provide service to the Company for the duration of the vesting period. The vesting of some RSUs is also performance-based and the vesting of those RSUs is subject to the achievement of specific performance metrics in addition to continued service. The Company issued 980,021 and 503,227 RSUs during the three months ended March 31, 2014 and 2013, respectively, and there were no RSAs outstanding during the three months ended March 31, 2014. The Company did not issue RSAs during the three months ended March 31, 2014 and 2013. The Company recognized stock-based compensation in the amount of $1.4 million and $1.0 million for RSAs and RSUs during the three months ended March 31, 2014 and 2013, respectively.
	A summary of the Company’s RSU activity during the three months March 31, 2014 is presented below:
		Number			Weighted				Aggregate
		of Restricted			Average Grant				Intrinsic
		Stock Units			Date Fair				Value
		Outstanding			Value				(in thousands)
	Outstanding — January 1, 2014		1,599,720		$	4.43			$	6,895
	Restricted stock units granted		980,021			4.32
	Restricted stock units released		(294,716	)		5.22
	Restricted stock units forfeited		(93,471	)		3.71
Outstanding — March 31, 2014		2,191,554		$	4.27			$	9,884
The majority of the RSUs that vested in the three months ended March 31, 2014 were net-share settled such that the Company withheld shares with value equivalent to the employees’ minimum statutory obligation for the applicable income and other employment taxes, and remitted the cash to the appropriate taxing authorities. The total shares withheld were based on the value of the RSUs on their vesting date as determined by the Company’s closing stock price. These net-share settlements had the effect of share repurchases by the Company as they reduced and retired the number of shares that would have otherwise been issued as a result of the vesting and did not represent an expense to the Company. For the three months ended March 31, 2014, 294,716 shares of RSUs vested with an intrinsic value of approximately $1.3 million. The Company withheld 94,477 shares to satisfy approximately $0.4 million of employees’ minimum tax obligation on the vested RSUs.
Employee Stock Purchase Plan — In March 2010, the Company’s board of directors approved the 2010 Employee Stock Purchase Plan (“ESPP”), effective upon the closing of the Company’s IPO. The price of the common stock purchased under the ESPP shall be the lower of 85% of the market value of the Company’s common stock at the beginning of the offering period or 85% of the market value of the Company’s common stock on the last trading day of the applicable offering period. On the first day of each of the Company’s fiscal years, beginning on January 1, 2011, additional shares equal to the lesser of 1% of the outstanding shares of the Company on such date or a lesser amount determined by the Company’s board of directors will be reserved for issuance under the ESPP; provided, however, that no annual increase shall be added after March 30, 2020.
The Company recognized compensation expense related to the ESPP in the amount of $0.2 million and $0.1 million for the three months ended March 31, 2014 and 2013. The Company had 460,008 shares of its common stock available for future issuance under the ESPP as of March 31, 2014.

Information_about_Geographic_A

Information about Geographic Areas	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Information about Geographic Areas	'
	12. Information about Geographic Areas
	The Company considers operating segments to be components of the Company in which separate financial information is available that is evaluated regularly by the Company’s chief operating decision maker, or decision making group, in deciding how to allocate resources and in assessing performance. The chief operating decision maker for the Company is the CEO. The CEO reviews financial information presented on a condensed consolidated basis, accompanied by information about revenue by geographic region, for purposes of allocating resources and evaluating financial performance. The Company has one business activity and there are no segment managers who are held accountable for operations, operating results or plans for levels or components below the consolidated unit level. Accordingly, the Company has determined that it has a single reporting segment and operating unit structure which is the development and marketing of wireless local area networks solutions.
	Revenues
	Revenues by geography are based on the billing address of the customer. The following table sets forth revenue by geographic area (in thousands):
		Three Months Ended March 31,
		2014		2013
	United States	$	9,501	$	14,072
	United Kingdom		5,110		4,146
	Asia Pacific		2,279		2,723
	Rest of EMEA		2,223		2,488
	Rest of Americas		1,487		1,306
	Total	$	20,600	$	24,735
	Long-Lived Assets
	The following table sets forth long-lived assets by geographic area (in thousands):
		March 31,		December 31,
		2014		2013
	United States	$	1,374	$	1,390
	India		1,077		1,055
	Japan		4		6
	Total	$	2,455	$	2,451

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	13. Income Taxes
	The Company’s provision for income taxes was $112,000 and $138,000 for the three months ended March 31, 2014 and 2013, consisting primarily of provisions for foreign income taxes.
	The Company files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. The Company’s tax years for 2002 and forward are subject to examination by the U.S. tax authorities and various state tax authorities. These years are open due to net operating losses and unutilized tax credits from such years. The Company’s tax years for December 31, 2008 and forward are subject to examination by the major foreign taxing jurisdictions in which the Company is subject to tax.

RelatedParty_Transactions

Related-Party Transactions	3 Months Ended
	Mar. 31, 2014
Related Party Transactions [Abstract]	'
Related-Party Transactions	'
	14. Related-Party Transactions
	In 2011, the Company invested in a private company that was considered a related party. The investee was co-founded by Dr. Vaduvur Bharghavan, who ceased being a member of the Company’s board of directors in May 2012. The total investment in this related party amounted to $1.3 million. See Note 7 for further discussion of this investment.
	The Company has a reseller in Japan that is a related party by virtue of its ownership of shares of the Company’s stock during the three months ended March 31, 2014 and 2013. The total revenue from this related party amounted to $0.3 million and $0.2 million for the three months ended March 31, 2014 and 2013. Accounts receivable from the reseller were $132,000 and $5,000 as of March 31, 2014 and December 31, 2013.

Business_and_Summary_of_Signif1

Business and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation — These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting and include the accounts of Meru and its wholly owned subsidiaries. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Accordingly, these unaudited interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013, filed on February 28, 2014. The condensed consolidated balance sheet as of December 31, 2013, included herein, was derived from the audited consolidated financial statements as of that date.
	The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and include all adjustments, consisting only of normal recurring adjustments, necessary for the fair presentation of the Company’s statement of financial position as of March 31, 2014 and December 31, 2013, the Company’s results of operations for the three months ended March 31, 2014 and 2013, comprehensive loss for the three months ended March 31, 2014 and 2013, and its cash flows for the three months ended March 31, 2014 and 2013. The results for the three months ended March 31, 2014 are not necessarily indicative of the results to be expected for the year ending December 31, 2014. All references to March 31, 2014 or to the three months ended March 31, 2014 and 2013 in the notes to the condensed consolidated financial statements are unaudited.
Use of Estimates	'
	Use of Estimates — The preparation of unaudited interim condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Such management estimates include litigation and settlement costs, other loss contingencies, sales returns and allowances, allowance for doubtful accounts, inventory valuation, reserve for warranty costs, valuation of deferred tax assets, stock-based compensation expense and fair value of warrants. The Company bases its estimates on historical experience and also on assumptions that it believes are reasonable. The Company assesses these estimates on a regular basis; however, actual results could materially differ from those estimates.
Certain Significant Risks and Uncertainties	'
	Certain Significant Risks and Uncertainties — The Company is subject to certain risks and uncertainties that could have a material and adverse effect on the Company’s future financial position or results of operations. Many of these risks and uncertainties are described in “Risk Factors” in Part II, Item 1A of this Quarterly Report, which risks and uncertainties include, among others: the Company may experience fluctuations in its revenues and operating results, which makes it difficult to predict future results and which may cause its stock price to decline; the Company has a limited operating history; the Company could continue to incur operating losses throughout 2014; fluctuations in operating results could cause the price of the Company’s common stock to decline; the Company may be unable to raise additional funds or to do so on favorable terms; the Company competes in highly competitive markets and is subject to various competitive pressures; the Company may be unable to compete in a rapidly evolving market and to respond quickly and effectively to changing market requirements; the Company must hire, integrate and retain qualified personnel; the Company’s investments may not generate anticipated revenues; the Company’s products may contain defects or errors; the Company’s failure to provide high-quality support and services could have a material and adverse effect on its business and results of operations; the Company may be unable to increase market awareness of its brand and products and develop and expand its sales channels; the Company’s international operations subject the Company to additional risks; the Company’s failure to maintain effective systems of internal controls could affect the Company’s ability to produce accurate financial results; gross margins for the Company’s products and services may vary; others may claim that the Company infringes their intellectual property rights; the Company may be unable to protect its intellectual property rights; the continued development of demand for wireless networks is uncertain; the Company’s sales cycle is long and unpredictable and subject to seasonal fluctuation; the Company’s revenues may decline as a result in changes in public funds of educational institutions; the Company may be unable to forecast customer demand accurately in making purchase decisions; average sales prices for the Company’s products may decline; the Company relies on channel partners to generate a substantial majority of its revenues and these partners may fail to perform; the Company relies on third parties to manufacture its products and fulfill customer orders and the failure of these third parties to perform could have an adverse effect on the Company’s reputation and ability to manufacture and distribute products; and, the Company may be required comply with new or modified regulations or standards related to its products.
Concentration of Supply Risk	'
	Concentration of Supply Risk — The Company relies on third parties to manufacture its products, and depends on them for the supply and quality of its products. Quality or performance failures of the Company’s products or changes in its manufacturers’ financial or business condition could disrupt the Company’s ability to supply quality products to its customers and thereby have a material and adverse effect on its business and operating results. Some of the components and technologies used in the Company’s products are purchased and licensed from a single source or a limited number of sources. The loss of any of these suppliers may cause the Company to incur additional transition costs, result in delays in the manufacturing and delivery of its products, or cause it to carry excess or obsolete inventory and could cause it to redesign its products. The Company relies on third parties for the fulfillment of its customer orders, and the failure of these third parties to perform could have an adverse effect upon the Company’s reputation and its ability to distribute its products, which could adversely affect the Company’s business.
Concentration of Credit Risk	'
	Concentration of Credit Risk — Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents and accounts receivable. The Company maintains its cash and cash equivalents in fixed-income securities with financial institutions and invests in only high-quality credit instruments. Deposits held with banks may exceed the amount of insurance provided on such deposits. Credit risk with respect to accounts receivable in general is diversified due to the number of different entities comprising the Company’s customer base and their location throughout the world. The Company works with both large and small channel partners, and generally performs ongoing credit evaluations of those customers. The Company maintains reserves for estimated potential credit losses. As of March 31, 2014, four distributor customers accounted for 64% of the Company’s net accounts receivable. As of December 31, 2013, two distributor customers accounted for 53% of the Company’s net accounts receivable. The Company usually does not require collateral on accounts receivable. As of March 31, 2014 and December 31, 2013, the allowance for doubtful accounts was $63,000 and $28,000.
Revenue Recognition	'
	Revenue Recognition — The Company’s revenues are derived primarily from hardware and software products and related support and services. The Company often enters into multiple deliverable arrangements and, as such, the elements of these arrangements are separated and valued based on their relative fair value. The majority of the Company’s products are networking communications hardware with embedded software components such that the software functions together with the hardware to provide the essential functionality of the product. Therefore, the Company’s hardware deliverables are considered to be non-software elements and are excluded from the scope of industry-specific software revenue recognition guidance. The Company’s products revenues also include revenues from the sale of stand-alone software products. Stand-alone software products may operate on the Company’s networking communications hardware, but are not considered essential to the functionality of the hardware. Sales of stand-alone software generally include a perpetual license to the Company’s software. Sales of stand-alone software continue to be subject to the industry-specific software revenue recognition guidance. Product support typically includes software updates on a when and if available basis, telephone and internet access to the Company’s technical support personnel and hardware support. Software updates provide customers with rights to unspecified software product upgrades and to maintenance releases and patches released during the term of the support period.
	Certain arrangements with multiple deliverables have stand-alone software elements that are subject to the existing software revenue recognition guidance along with non-software elements that are subject to the amended revenue accounting guidance. The revenue for these multiple deliverable arrangements is allocated to the stand-alone software elements as a group and to the non-software elements based on the relative selling prices of all of the elements in the arrangement using the fair value hierarchy in the amended revenue accounting guidance.
	For sales of stand-alone software, the Company uses the residual method to recognize revenue when an agreement includes one or more elements to be delivered at a future date and vendor specific objective evidence (“VSOE”) of all undelivered elements exists. The Company establishes VSOE for these arrangements based on sales of support services arrangements on a stand-alone basis. The normal pricing for multi-year support services arrangements is based on the normal price of a one year support services arrangement multiplied by the number of years of support services which is then adjusted for the time value of money and the decreased sales and fulfillment effort for support service periods of longer than one year. In the majority of the Company’s contracts, the only element that remains undelivered at the time of delivery of the software product is support services. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the contract fee is recognized as product revenues. If evidence of the fair value of one or more undelivered elements does not exist, all revenue is generally deferred and recognized when delivery of those elements occurs or when fair value can be established. When the undelivered element for which the Company does not have VSOE is support, revenue for the entire arrangement is bundled and recognized ratably over the support period.
	VSOE for elements of an arrangement is based upon the normal pricing and discounting practices for those services when sold separately. In determining VSOE, the Company requires that a substantial majority of the selling prices for an element falls within a reasonably narrow pricing range, generally evidenced by a substantial majority of such historical stand-alone transactions falling within a reasonably narrow range of the median rates.
	Third-party evidence (“TPE”) of selling price is determined based on competitor prices for similar deliverables when sold separately. However, the Company is typically not able to determine TPE for its products or services. Generally, the Company’s go-to-market strategy differs from that of its peers and the Company’s offerings contain a significant level of differentiation such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, the Company is unable to reliably determine the selling prices for similar products from competitors on a stand-alone basis. The Company establishes estimated selling prices (“ESP”) for support services based on its normal pricing and discounting practices for support services. This ESP analysis requires that a substantial majority of the support services selling prices fall within a reasonably narrow pricing range, which is typically broader than the range used to evidence VSOE. The Company believes that this is the price at which it would sell support services if support services were regularly sold on a stand-alone basis.
	When the Company is unable to establish the selling price of its non-software elements using VSOE or TPE, the Company uses ESP in its allocation of arrangement consideration. The objective of ESP is the estimated price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. The Company determines ESP for a product or service by considering multiple factors including, but not limited to, pricing policies, internal costs, gross margin objectives and discount from the list prices.
	The Company regularly reviews VSOE and ESP and maintains internal controls over the establishment and updates of these estimates. There was not a material impact from changes in VSOE or ESP during the quarters ended March 31, 2014 and 2013, nor does the Company currently expect a material impact in the near term, from changes in VSOE or ESP.
	The Company recognizes revenues when all of the following have occurred: (1) the Company has entered into a legally binding arrangement with a customer; (2) delivery has occurred; (3) customer payment is deemed fixed or determinable and free of contingencies and significant uncertainties; and (4) collection is probable. The sales prices for the Company’s products are typically considered to be fixed or determinable at the inception of an arrangement. Delivery is considered to have occurred when product title has transferred to the customer, when the service or training has been provided, when software is delivered, or when the support period has lapsed. To the extent that agreements contain rights of return or acceptance provisions, revenues are deferred until the acceptance provisions or rights of return lapse.
	The majority of the Company’s sales are generated through its distributors. Revenues from distributors with return rights are recognized when the distributor reports that the product has been sold through, provided that all other revenue recognition criteria have been met. The Company obtains sell-through information from these distributors. For transactions with other distributors, the Company does not provide for rights of return and recognizes products revenues at the time of shipment, assuming all other revenue recognition criteria have been met. Sales to certain distributors were made pursuant to price discounts based on certain criteria and the Company accrued the estimated price discount as a reduction to both accounts receivable and net revenues.
	Revenues for support services are recognized on a straight-line basis over the support period, which typically ranges from one year to five years.
	Shipping charges billed to customers are included in products revenues and the related shipping costs are included in costs of products revenues.
Impairment of Long-Lived Assets	'
	Impairment of Long-Lived Assets—The Company evaluates its long-lived assets for indicators of possible impairment when events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Impairment exists if the carrying amounts of such assets exceed the estimates of future net undiscounted cash flows expected to be generated by such assets. Should impairment exist, the impairment loss would be measured based on the excess carrying value of the asset over the asset’s estimated fair value. The Company did not write down any of its long-lived assets as a result of impairment during the three months ended March 31, 2014 and 2013.
Goodwill	'
	Goodwill—Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. The Company reviews goodwill for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value may not be recoverable. The Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step quantitative goodwill impairment test. If, after assessing the totality of circumstances, an entity determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, then it is required to perform the two-step impairment test. It does not require an entity to calculate the fair value of a reporting unit unless the entity determines that it is more likely than not that its fair value is less than its carrying value. However, an entity also has the option to bypass the qualitative assessment for any reporting unit in any period and proceed directly to performing the first step of the two-step goodwill impairment test. The Company has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. As the Company uses the market approach to assess impairment, its common stock price is an important component of the fair value calculation. If the Company’s stock price continues to experience significant price and volume fluctuations, this will impact the fair value of the reporting unit and can lead to potential impairment in future periods. The Company performed its annual impairment test in June 2013 and determined that its goodwill was not impaired. As of March 31, 2014, the Company had not identified any factors that indicated there was an impairment of its goodwill and determined that no additional impairment analysis was then required.
Loss Contingencies	'
	Loss Contingencies—The Company is or has been subject to proceedings, lawsuits and other claims arising in the ordinary course of business. The Company evaluates contingent liabilities, including threatened or pending litigation, for potential losses. If the potential loss from any claim or legal proceedings is considered probable and the amount can be estimated, the Company accrues a liability for the estimated loss. Because of uncertainties related to these matters, accruals are based upon the best information available. For potential losses for which there is a reasonable possibility (meaning the likelihood is more than remote but less than probable) that a loss exists, the Company will disclose an estimate of the potential loss or range of such potential loss or include a statement that an estimate of the potential loss cannot be made. As additional information becomes available, the Company reassesses the potential liability related to pending claims and litigation and may revise its estimates, which could materially impact its condensed consolidated financial statements.
Warranty	'
	Warranty — The Company provides a warranty on products and estimated warranty costs are recorded during the period of sale. The Company establishes warranty reserves based on estimates of product warranty return rates and expected costs to repair or to replace the products under warranty. The warranty provision is recorded as a component of costs of products revenues in the condensed consolidated statements of operations.
	Accrued warranty, which is included in accrued liabilities on the condensed consolidated balance sheets, as of March 31, 2014 is as follows (in thousands):
		March 31,
		2014
	Accrued warranty balance — January 1, 2014	$	1,345
	Warranty costs incurred		(25	)
	Provision for warranty		122
	Accrued warranty balance — March 31, 2014	$	1,442

Business_and_Summary_of_Signif2

Business and Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Schedule of Accrued Warranty	'
	Accrued warranty, which is included in accrued liabilities on the condensed consolidated balance sheets, as of March 31, 2014 is as follows (in thousands):
		March 31,
		2014
	Accrued warranty balance — January 1, 2014	$	1,345
	Warranty costs incurred		(25	)
	Provision for warranty		122
	Accrued warranty balance — March 31, 2014	$	1,442

Inventory_Tables

Inventory (Tables)	3 Months Ended
	Mar. 31, 2014
Inventory Disclosure [Abstract]	'
Schedule of Inventory	'
	Inventory as of March 31, 2014 and December 31, 2013 is as follows (in thousands):
		March 31,		December 31,
		2014		2013
	Finished goods	$	7,383	$	6,692
	Channel inventory		554		538
	Inventory	$	7,937	$	7,230

Net_Loss_Per_Share_of_Common_S1

Net Loss Per Share of Common Stock (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Schedule of Outstanding Shares of Common Stock and Common Stock Equivalents Excluded From Computation of Diluted Net Loss per Share of Common Stock	'
	The following outstanding shares of common stock and common stock equivalents were excluded from the computation of diluted net loss per share of common stock for the periods presented because including them would have been antidilutive:
			Three Months Ended
			March 31,
			2014		2013
	Stock awards and stock options to purchase common stock *			5,002,818		4,720,468
	Common stock warrants			468,293		3,192,250
	*	Includes 195,370 and 185,386 shares, which were expected to be issued pursuant to the Company’s Employee Stock Purchase Plan as of March 31, 2014 and 2013, respectively, based on employee enrollment.

Cost_Reduction_Program_Tables

Cost Reduction Program (Tables)	3 Months Ended
	Mar. 31, 2014
Restructuring And Related Activities [Abstract]	'
Schedule of Restructuring Expenses	'
	The Company recorded the restructuring expenses in the condensed statements of operations as follows (in thousands):
		Three Months Ended
		March 31, 2014
	Research and development	$	43
	Sales and marketing		469
	General and administrative		223
	Total restructuring expenses	$	735
Summary of the Restructuring Activities Included in Accrued Liabilities	'
	The following table provides a summary of the restructuring activities included in accrued liabilities during the three months ended March 31, 2014 (in thousands):
					Other Exit-
		Severance			Related Costs			Total
	Balance at January 1, 2014	$	—		$	—		$	—
	Restructuring expenses		705			30			735
	Cash payments		(156	)		(5	)		(161	)
	Stock-based compensation		(147	)		—			(147	)
	Balance at March 31, 2014	$	402		$	25		$	427

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value of Financial Assets	'
	As of March 31, 2014, the Company’s fair value hierarchy for its financial assets was as follows (in thousands):
		March 31, 2014
		Quoted Prices in Active		Significant Other		Significant		Total
		Markets for Identical		Observable		Unobservable		Fair Value
		Instruments		(Level II)		(Level III)
		(Level I)
	Assets:
	Money market funds	$	15,085	$	—	$	—	$	15,085
	As of December 31, 2013, the Company’s fair value hierarchy for its financial assets was as follows (in thousands):
		December 31, 2013
		Quoted Prices in Active		Significant Other		Significant		Total
		Markets for Identical		Observable		Unobservable		Fair Value
		Instruments		(Level II)		(Level III)
		(Level I)
	Assets:
	Money market funds	$	15,084	$	—	$	—	$	15,084

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Schedule of Identifiable Intangible Assets	'
	Intangible assets acquired are accounted for based on the fair value of assets purchased and are amortized over the period in which economic benefit is estimated to be received. Identifiable intangible assets were as follows (in thousands):
		As of March 31, 2014
		Estimated		Gross		Accumulated			Net
		Useful Life		Value		Amortization			Value
	Developed technology		3 years	$	630	$	(542	)	$	88
	Total			$	630	$	(542	)	$	88
		As of December 31, 2013
		Estimated		Gross		Accumulated			Net
		Useful Life		Value		Amortization			Value
	Developed technology		3 years	$	630	$	(490	)	$	140
	Customer relationships		2 years		160		(160	)		—
	Total			$	790	$	(650	)	$	140
Schedule of Amortization Expense Related to Identified Intangible Assets	'
	The Company recorded amortization expense related to these identified intangible assets in the condensed consolidated statements of operations as follows (in thousands):
		Three Months Ended March 31,
		2014		2013
	Costs of products revenues	$	52	$	52
	Sales and marketing		—		20
	Total amortization expense	$	52	$	72
Schedule of Estimated Aggregate Future Amortization Expense in Future Years	'
	As of March 31, 2014, the estimated aggregate future amortization expense in future years is as follows (in thousands):
	Fiscal Years:
	2014 (remainder)	$	88
	Total	$	88

Borrowings_Tables

Borrowings (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Schedule of Principal Payments for Company's Long-Term Debt	'
	The scheduled principal payments for the Company’s long-term debt under the VLL Agreement as of March 31, 2014 are as follows (in thousands):
		Long-term Debt
	Fiscal Years:
	2014 (remainder)	$	2,921
	2015		2,827
	Total		5,748
	Less: unamortized discounts		(110	)
	Less: current portion		(3,858	)
	Long-term debt, net of current portion	$	1,780

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Schedule of Commitments Under Operating Leases	'
	Commitments under these operating leases are as follows (in thousands):
		Operating Leases
	Fiscal Years:
	2014 (remainder)	$	1,212
	2015		498
	2016		129
	Total	$	1,839

Common_Stock_Tables

Common Stock (Tables)	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Schedule of Assumptions Used to Determine Fair Value of Warrants	'
	Upon issuance, the Company determined the fair value using the Black-Scholes option-pricing model with the following assumptions:
		June 2012
	Dividend rate	0%
	Risk-free interest rate	0.70%
	Expected life (in years)	5
	Expected volatility	59.10%

Equity_Incentive_Plans_Tables

Equity Incentive Plans (Tables)	3 Months Ended
	Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Schedule of Weighted-Average Assumptions Used to Estimate Fair Value of Each Employee Stock Option	'
	The fair value of each employee stock option was estimated at the date of grant using a Black-Scholes option-pricing model, with the following weighted-average assumptions for grants of options during the three months ended March 31, 2013:
		Three Months Ended
		March 31, 2013
	Dividend rate	0%
	Risk-free interest rate	0.60%
	Expected life (in years)	4.1
	Expected volatility	70.70%
Summary of Stock Award Activity	'
	A summary of the Company’s stock award activity during the three months ended March 31, 2014 is presented below:
													Weighted-
									Weighted-				Average				Aggregate
		Shares			Number				Average				Remaining				Intrinsic
		Available			of Stock Options				Exercise				Contractual				Value
		for Grant			Outstanding				Price				Life (Years)				(in thousands)
	Outstanding — January 1, 2014		2,232,803			2,833,578			$	4.68				7.9			$	1,907
	Additional options authorized		917,598			—				—
	Restricted stock granted		(980,021	)		—				—
	Cancelled options		160,362			(160,362	)			4.86
	Restricted stock returned		187,948			—				—
	Exercised options		—			(57,322	)			2.86
	Outstanding — March 31, 2014		2,518,690			2,615,894			$	4.71				7.6			$	1,975
	Vested and expected to vest — March 31, 2014					2,113,252			$	4.85				7.4			$	1,618
	Vested — March 31, 2014					1,399,470			$	5.55				6.9			$	810
Schedule of Additional Information Regarding Company's Stock Options Outstanding and Vested	'
	Additional information regarding the Company’s stock options outstanding and vested as of March 31, 2014 is summarized below:
		Options Outstanding									Options Vested and Exercisable
					Weighted-Average		Weighted-								Weighted-
					Remaining		Average								Average
					Contractual Life		Exercise								Exercise
	Exercise Prices	Shares			(Years)		Price per Share				Shares				Price per Share
	$0.91 - $2.17		286,029		7.9		$	1.66				123,543			$	1.62
	$2.18 - $4.33		1,053,469		8.2		$	3.41				409,707			$	3.4
	$4.34 - $6.50		883,525		7.6		$	4.86				488,620			$	4.86
	$6.51 - $19.51		392,871		5.8		$	10.08				377,600			$	10.05
			2,615,894		7.6		$	4.71				1,399,470			$	5.55
Summary of RSU Activity	'
	A summary of the Company’s RSU activity during the three months March 31, 2014 is presented below:
		Number			Weighted				Aggregate
		of Restricted			Average Grant				Intrinsic
		Stock Units			Date Fair				Value
		Outstanding			Value				(in thousands)
	Outstanding — January 1, 2014		1,599,720		$	4.43			$	6,895
	Restricted stock units granted		980,021			4.32
	Restricted stock units released		(294,716	)		5.22
	Restricted stock units forfeited		(93,471	)		3.71
	Outstanding — March 31, 2014		2,191,554		$	4.27			$	9,884

Information_about_Geographic_A1

Information about Geographic Areas (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Schedule of Revenues and Long-lived Assets by Geographic Area	'
	The following table sets forth revenue by geographic area (in thousands):
		Three Months Ended March 31,
		2014		2013
	United States	$	9,501	$	14,072
	United Kingdom		5,110		4,146
	Asia Pacific		2,279		2,723
	Rest of EMEA		2,223		2,488
	Rest of Americas		1,487		1,306
	Total	$	20,600	$	24,735
	Long-Lived Assets
	The following table sets forth long-lived assets by geographic area (in thousands):
		March 31,		December 31,
		2014		2013
	United States	$	1,374	$	1,390
	India		1,077		1,055
	Japan		4		6
	Total	$	2,455	$	2,451

Business_and_Summary_of_Signif3

Business and Summary of Significant Accounting Policies - Additional Information 1 (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
	Customer	Customer
Concentration Risk [Line Items]	'	'
Allowance for doubtful accounts	63,000	28,000
Accounts Receivable [Member] | Concentration of Credit Risk [Member] | Distributor Customers [Member]	'	'
Concentration Risk [Line Items]	'	'
Number of significant customers	4	2
Concentration risk percentage	64.00%	53.00%

Business_and_Summary_of_Signif4

Business and Summary of Significant Accounting Policies - Additional Information 2 (Detail)	3 Months Ended
	Mar. 31, 2014
Minimum [Member]	'
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]	'
Period for recognition of revenues for support services	'1 year
Maximum [Member]	'
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]	'
Period for recognition of revenues for support services	'5 years

Business_and_Summary_of_Signif5

Business and Summary of Significant Accounting Policies - Additional Information 3 (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accounting Policies [Abstract]	'	'
Impairment expenses on long-lived assets	$0	$0

Business_and_Summary_of_Signif6

Business and Summary of Significant Accounting Policies - Schedule of Accrued Warranty (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
Product Warranties Disclosures [Abstract]	'
Accrued warranty balance at the beginning of period	$1,345
Warranty costs incurred	-25
Provision for warranty	122
Accrued warranty balance at the end of period	$1,442

Inventory_Schedule_of_Inventor

Inventory - Schedule of Inventory (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Finished goods	$7,383	$6,692
Channel inventory	554	538
Inventory	$7,937	$7,230

Net_Loss_Per_Share_of_Common_S2

Net Loss Per Share of Common Stock - Schedule of Outstanding Shares of Common Stock and Common Stock Equivalents Excluded From Computation of Diluted Net Loss per Share of Common Stock (Detail)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Stock Awards and Stock Options to Purchase Common Stock [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Shares excluded from the computation of diluted net loss per share of common stock	5,002,818	4,720,468
Common Stock Warrants [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Shares excluded from the computation of diluted net loss per share of common stock	468,293	3,192,250

Net_Loss_Per_Share_of_Common_S3

Net Loss Per Share of Common Stock - Schedule of Outstanding Shares of Common Stock and Common Stock Equivalents Excluded From Computation of Diluted Net Loss per Share of Common Stock (Parenthetical) (Detail) (Employee Stock Purchase Plan [Member])	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Employee Stock Purchase Plan [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Shares excluded from the computation of diluted net loss per share of common stock	195,370	185,386

Cost_Reduction_Program_Additio

Cost Reduction Program - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
	Positions
Restructuring Cost and Reserve [Line Items]	'
Restructuring cost	$735,000
Number of positions eliminated	18
Stock-based compensation expense related to restructuring	147,000
Remaining estimated costs	$400,000
Expected payment date of remaining estimated costs	31-Mar-15
Restricted Stock Units [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Accelerated vesting of restricted stock units	59,000
Number of employee affected	2

Cost_Reduction_Program_Schedul

Cost Reduction Program - Schedule of Restructuring Expenses (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]	'
Total restructuring expenses	$735
Research and Development [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Total restructuring expenses	43
Selling and Marketing [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Total restructuring expenses	469
General and Administrative [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Total restructuring expenses	$223

Cost_Reduction_Program_Summary

Cost Reduction Program - Summary of the Restructuring Activities Included in Accrued Liabilities (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]	'
Beginning balance	'
Restructuring expenses	735
Cash payments	-161
Stock-based compensation	-147
Ending balance	427
Severance [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Beginning balance	'
Restructuring expenses	705
Cash payments	-156
Stock-based compensation	-147
Ending balance	402
Other Exit- Related Costs [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Beginning balance	'
Restructuring expenses	30
Cash payments	-5
Stock-based compensation	'
Ending balance	$25

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value Disclosures [Abstract]	'	'
Financial liabilities that are measured at fair value on a recurring basis	$0	$0
Fair value assets transfers between Level I to Level II	0	0
Fair value assets transfers between Level II to Level I	$0	$0

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments - Schedule of Fair Value of Financial Assets (Detail) (Recurring [Member], Money Market Funds [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]	'	'
Assets:	'	'
Fair value of financial assets	$15,085	$15,084
Significant Other Observable (Level II) [Member]	'	'
Assets:	'	'
Fair value of financial assets	'	'
Significant Unobservable (Level III) [Member]	'	'
Assets:	'	'
Fair value of financial assets	'	'
Total Fair Value [Member]	'	'
Assets:	'	'
Fair value of financial assets	$15,085	$15,084

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Goodwill	$1,658	$1,658

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Schedule of Identifiable Intangible Assets (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Value	$630	$790
Accumulated Amortization	-542	-650
Net Value	88	140
Developed Technology [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Estimated Useful Life	'3 years	'3 years
Gross Value	630	630
Accumulated Amortization	-542	-490
Net Value	88	140
Customer Relationships [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Estimated Useful Life	'	'2 years
Gross Value	'	160
Accumulated Amortization	'	-160
Net Value	'	'

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Schedule of Amortization Expense Related to Identified Intangible Assets (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Total amortization expense	$52	$72
Costs of Revenues [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Total amortization expense	52	52
Selling and Marketing [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Total amortization expense	'	$20

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets - Schedule of Estimated Aggregate Future Amortization Expense in Future Years (Detail) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Fiscal Years:	'
2014 (remainder)	$88
Total	$88

Cost_Method_Investments_Additi

Cost Method Investments - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2011	Mar. 31, 2014	Dec. 31, 2013
Investments Debt And Equity Securities [Abstract]	'	'	'
Amount invested in a company co-founded by Dr. Vaduvur Bharghavan	$1.30	'	'
Investment amount included in other assets	'	$1.30	$1.30

Borrowings_Additional_Informat

Borrowings - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended
	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013
		Installment
Debt Instrument [Line Items]	'	'	'
Unamortized discounts	'	$110,000	'
Long-Term Debt [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Amount of debt financing	12,000,000	'	'
Gross proceeds from long-term debt	11,700,000	'	'
Debt issuance costs	162,000	162,000	'
Fixed interest rate	'	12.00%	'
Number of equal installments	'	39	'
Monthly payments for both principal and interest	'	369,405	'
Additional payment required to be made at the earlier occurrence of change of control or maturity date of VLL agreement	'	2,000,000	'
Additional interest expense	'	200,000	200,000
Debt instrument, maturity date	'	1-Sep-15	'
Number of securities that can be purchased from warrants issued	'	468,293	'
Exercise price of warrant	'	2.05	'
Fair value of warrant recorded as debt discount	'	384,000	'
Aggregate debt discounts	'	546,000	'
Interest expense, net related to the debt discounts	'	41,000	64,000
Unamortized discounts	'	110,000	'
Current debt discount	'	$105,000	'
Warrant expiration date	'	1-Jun-17	'
Long-Term Debt [Member] | Period Before January 1, 2014 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Prepayment penalty	'	100.00%	'
Long-Term Debt [Member] | Period on or After January 1, 2014 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Prepayment penalty	'	80.00%	'

Borrowings_Schedule_of_Princip

Borrowings - Schedule of Principal Payments for Company's Long-Term Debt (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fiscal Years:	'	'
2014 (remainder)	$2,921	'
2015	2,827	'
Total	5,748	'
Less: unamortized discounts	-110	'
Less: current portion	-3,858	-3,718
Long-term debt, net of current portion	$1,780	$2,797

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Loss Contingencies [Line Items]	'
Additional number of years for which lease can be renewed	'5 years
Other commitments consisted of inventory and other noncancelable purchase obligations	$6.20
Office Space Leased for Headquarters [Member]	'
Loss Contingencies [Line Items]	'
Area leased	44,000
Operating lease expiration year	'2015
Space for Research and Development Facility [Member]	'
Loss Contingencies [Line Items]	'
Area leased	35,000
Operating lease expiration year	'2016

Commitments_and_Contingencies_2

Commitments and Contingencies - Schedule of Commitments Under Operating Leases (Detail) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Fiscal Years:	'
2014 (remainder)	$1,212
2015	498
2016	129
Total	$1,839

Common_Stock_Additional_Inform

Common Stock - Additional Information (Detail) (USD $)

3 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

12 Months Ended

Mar. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 04, 2013

Feb. 27, 2013

Jun. 30, 2012

Mar. 31, 2014

Mar. 31, 2014

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Mar. 31, 2014

Mar. 31, 2014

Underwriting Agreement [Member]

Underwriting Agreement [Member]

Common Stock Warrant Issued in Connection with VLL Agreement [Member]

Common Stock Warrant Issued in Connection with VLL Agreement [Member]

Common Stock Warrant [Member]

Common Stock Warrant [Member]

Common Stock Warrant [Member]

Common Stock Warrant [Member]

Common Stock Warrant [Member]

Common Stock Warrant [Member]

Minimum [Member]

Maximum [Member]

Class of Warrant or Right [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of common stock shares the Company agreed to sell due to underwriting agreement

'

'

'

'

3,000,000

'

'

'

'

'

'

'

'

Common stock, par value

'

$0.00

$0.00

'

$0.00

'

'

'

'

'

'

'

'

Common stock price per share

'

'

'

'

$4

'

'

'

'

'

'

'

'

Period granted to underwriter for purchase of additional shares

'

'

'

'

'30 days

'

'

'

'

'

'

'

'

Common stock issued to underwriters under an over-allotment option

'

'

'

'

450,000

'

'

'

'

'

'

'

'

Sale of common stock to underwriter

'

'

'

3,450,000

'

'

'

'

'

'

'

'

'

Proceeds from issuance of common stock, net of underwriting discount, commission and other issuance costs

$12,556,000

'

'

$12,600,000

'

'

'

'

'

'

'

'

'

Number of securities that can be purchased from warrants issued

'

'

'

'

'

468,293

'

'

'

36,582

4,007,432

'

'

Exercise price of warrants

'

'

'

'

'

2.05

'

'

'

'

'

9.78

11.74

Warrant expiry date

'

'

'

'

'

1-Jun-17

'

'

'

'

'

'

'

Fair value of warrant recorded as debt discount

'

'

'

'

'

'

$384,000

'

'

'

'

'

'

Number of warrants to purchase shares exercised

'

'

'

'

'

'

'

'

1,265,293

54,764

'

'

'

Shares issued upon exercise of warrants

'

'

'

'

'

'

'

'

548,125

19,072

'

'

'

Warrants outstanding

'

'

'

'

'

'

'

2,723,957

'

'

'

'

'

Common stock warrant expired unexercised date

'

'

'

'

'

'

'

12-Mar-14

'

'

'

'

'

Common_Stock_Schedule_of_Assum

Common Stock - Schedule of Assumptions Used to Determine Fair Value of Warrants (Detail)	1 Months Ended
	Jun. 30, 2012
Warrants And Rights Note Disclosure [Abstract]	'
Dividend rate	0.00%
Risk-free interest rate	0.70%
Expected life (in years)	'5 years
Expected volatility	59.10%

Equity_Incentive_Plans_Additio

Equity Incentive Plans - Additional Information (Detail) (USD $)

3 Months Ended

3 Months Ended

0 Months Ended

0 Months Ended

3 Months Ended

1 Months Ended

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

Jul. 26, 2012

Jul. 26, 2012

Aug. 23, 2012

Jul. 26, 2012

Mar. 31, 2014

Jun. 06, 2013

Mar. 31, 2014

Mar. 31, 2012

Mar. 31, 2012

Mar. 31, 2012

Mar. 31, 2014

Mar. 31, 2014

Stock Options [Member]

Stock Options [Member]

Eligible Options [Member]

Eligible Options [Member]

New Option [Member]

New Option [Member]

2013 Plan [Member]

2013 Plan [Member]

2010 Plan [Member]

CEO Inducement Plan and Agreement [Member]

Service-Based Restricted Stock Unit Plan and Agreement [Member]

Performance-Based Restricted Stock Unit Plan and Agreement [Member]

Inducement Stock Option Plan [Member]

Restricted Stock Unit Plans and Agreements [Member]

Minimum [Member]

Stock Options [Member]

Restricted Stock Units [Member]

Restricted Stock Units [Member]

Stock Options [Member]

Restricted Stock Units [Member]

Dr. Bami Bastani, CEO [Member]

Dr. Bami Bastani, CEO [Member]

Dr. Bami Bastani, CEO [Member]

Dr. Bami Bastani, CEO [Member]

Dr. Bami Bastani, CEO [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares of common stock reserved for future issuance

'

'

'

'

'

'

'

'

'

'

500,000

'

'

'

'

'

'

Number of restricted stock units issued and outstanding

'

'

'

'

'

'

'

'

'

315,000

'

'

'

'

'

'

45,000

Outstanding at the end of the period

2,518,690

'

2,232,803

'

'

'

'

'

'

185,000

'

'

'

'

'

'

'

Options granted

0

'

'

'

'

'

'

'

692,682

'

'

'

600,000

'

'

'

'

Shares granted

'

'

'

'

'

'

'

'

'

'

'

'

'

50,000

50,000

'

'

Options outstanding

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

600,000

'

Maximum increase in the number of shares reserved for issuance on the first day of each of the Company's fiscal years

'

'

'

'

'

'

'

'

'

'

'

4.00%

'

'

'

'

'

Stock-based compensation expense

$1,973,000

$1,454,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accrued liabilities

300,000

'

600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate intrinsic value of options exercised

'

'

'

89,000

47,000

'

'

'

'

'

'

'

'

'

'

'

'

Total compensation cost related to unvested stock-based awards not yet recognized

9,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted-average remaining period to amortize compensation cost not yet recognized

'2 years 2 months 12 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exercise price to be eligible for tender offer (in dollars per share)

'

'

'

'

'

'

$2

'

'

'

'

'

'

'

'

'

'

Options to purchase shares of common stock (the "Exchanged Options") were cancelled and exchanged under tender offer

'

'

'

'

'

960,443

'

'

'

'

'

'

'

'

'

'

'

Percentage of options vesting after the first year of service

'

'

'

'

'

'

'

'

25.00%

'

'

'

'

'

'

'

'

Remaining vesting period of options

'

'

'

'

'

'

'

'

'36 months

'

'

'

'

'

'

'

'

Exercise price

'

'

'

'

'

'

'

$3.40

'

'

'

'

'

'

'

'

'

Incremental charge due to modification

'

'

'

'

'

'

'

$500,000

'

'

'

'

'

'

'

'

'

Amortization period of incremental charge

'

'

'

'

'

'

'

'4 years

'

'

'

'

'

'

'

'

'

Equity_Incentive_Plans_Schedul

Equity Incentive Plans - Schedule of Weighted-Average Assumptions Used to Estimate Fair Value of Each Employee Stock Option (Detail) (Stock Options [Member])	3 Months Ended
	Mar. 31, 2013
Stock Options [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Dividend rate	0.00%
Risk-free interest rate	0.60%
Expected life (in years)	'4 years 1 month 6 days
Expected volatility	70.70%

Equity_Incentive_Plans_Summary

Equity Incentive Plans - Summary of Stock Award Activity (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Beginning balance, Shares Available for Grant	2,232,803	'
Additional options authorized, Shares Available for Grant	917,598	'
Restricted stock granted, Shares Available for Grant	-980,021	'
Cancelled options, Shares Available for Grant	160,362	'
Restricted stock returned, Shares Available for Grant	187,948	'
Exercised options, Shares Available for Grant	'	'
Ending balance, Shares Available for Grant	2,518,690	'
Stock Options [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Beginning balance, Number of Stock Options Outstanding	2,833,578	'
Cancelled options, Number of Stock Options Outstanding	-160,362	'
Exercised options, Number of Stock Options Outstanding	-57,322	'
Ending balance, Number of Stock Options Outstanding	2,615,894	2,833,578
Vested and expected to vest at the end of the period, Number of Stock Options Outstanding	2,113,252	'
Vested at the end of the period, Number of Stock Options Outstanding	1,399,470	'
Beginning balance, Weighted- Average Exercise Price	$4.68	'
Cancelled options, Weighted- Average Exercise Price	$4.86	'
Exercised options, Weighted- Average Exercise Price	$2.86	'
Ending balance, Weighted- Average Exercise Price	$4.71	$4.68
Vested and expected to vest at the end of the period, Weighted- Average Exercise Price	$4.85	'
Vested at the end of the period, Weighted- Average Exercise Price	$5.55	'
Weighted-Average Remaining Contractual Life (Years)	'7 years 7 months 6 days	'7 years 10 months 24 days
Vested and expected to vest at the end of the period, Weighted-Average Remaining Contractual Life (Years)	'7 years 4 months 24 days	'
Vested at the end of the period, Weighted-Average Remaining Contractual Life (Years)	'6 years 10 months 24 days	'
Aggregate Intrinsic Value	$1,907	'
Aggregate Intrinsic Value	1,975	1,907
Vested and expected to vest at the end of the period, Aggregate Intrinsic Value	1,618	'
Vested at the end of the period, Aggregate Intrinsic Value	$810	'

Equity_Incentive_Plans_Schedul1

Equity Incentive Plans - Schedule of Additional Information Regarding Company's Stock Options Outstanding and Vested (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Options Outstanding, Shares	2,615,894
Weighted-Average Remaining Contractual Life (Years)	'7 years 7 months 6 days
Weighted-Average Exercise Price per Share	$4.71
Options Vested and Exercisable, Shares	1,399,470
Weighted-Average Exercise Price per Share	$5.55
Exercise Prices $0.91 - $2.17 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Prices, low end of the range	$0.91
Exercise Prices, high end of the range	$2.17
Options Outstanding, Shares	286,029
Weighted-Average Remaining Contractual Life (Years)	'7 years 10 months 24 days
Weighted-Average Exercise Price per Share	$1.66
Options Vested and Exercisable, Shares	123,543
Weighted-Average Exercise Price per Share	$1.62
Exercise Prices $2.18 - $4.33 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Prices, low end of the range	$2.18
Exercise Prices, high end of the range	$4.33
Options Outstanding, Shares	1,053,469
Weighted-Average Remaining Contractual Life (Years)	'8 years 2 months 12 days
Weighted-Average Exercise Price per Share	$3.41
Options Vested and Exercisable, Shares	409,707
Weighted-Average Exercise Price per Share	$3.40
Exercise Prices $4.34 - $6.50 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Prices, low end of the range	$4.34
Exercise Prices, high end of the range	$6.50
Options Outstanding, Shares	883,525
Weighted-Average Remaining Contractual Life (Years)	'7 years 7 months 6 days
Weighted-Average Exercise Price per Share	$4.86
Options Vested and Exercisable, Shares	488,620
Weighted-Average Exercise Price per Share	$4.86
Exercise Prices $6.51 - $19.51 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Prices, low end of the range	$6.51
Exercise Prices, high end of the range	$19.51
Options Outstanding, Shares	392,871
Weighted-Average Remaining Contractual Life (Years)	'5 years 9 months 18 days
Weighted-Average Exercise Price per Share	$10.08
Options Vested and Exercisable, Shares	377,600
Weighted-Average Exercise Price per Share	$10.05

Equity_Incentive_Plans_Additio1

Equity Incentive Plans - Additional Information 1 (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Amount withheld to satisfy employees' minimum tax obligation on the vested restricted stock units	$406,000	$25,000	'
Shares of common stock available for future issuance	2,518,690	'	2,232,803
Restricted Stock Awards and Restricted Stock Units [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock-based compensation expense	1,400,000	1,000,000	'
Restricted Stock Units [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Issued	980,021	503,227	'
Outstanding balance	2,191,554	'	1,599,720
Released, Number of Restricted Stock Units Outstanding	294,716	'	'
Intrinsic value restricted stock units vested	1,300,000	'	'
Shares withheld to satisfy employees' minimum tax obligation on the vested restricted stock units	94,477	'	'
Amount withheld to satisfy employees' minimum tax obligation on the vested restricted stock units	400,000	'	'
Restricted Stock Awards [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Issued	0	0	'
Outstanding balance	0	'	'
Maximum [Member] | Restricted Stock Awards and Restricted Stock Units [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Vesting period	'4 years	'	'
Employee Stock Purchase Plan [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock-based compensation expense	$200,000	$100,000	'
Purchase price as a percentage of the market value of the common stock over a specified period	85.00%	'	'
Maximum increase in the number of shares reserved for issuance on the first day of each of the Company's fiscal years	1.00%	'	'
Shares of common stock available for future issuance	460,008	'	'

Equity_Incentive_Plans_Summary1

Equity Incentive Plans - Summary of RSU Activity (Detail) (Restricted Stock Units [Member], USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Restricted Stock Units [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Balance at beginning of period	1,599,720	'
Granted, Number of Restricted Stock Units Outstanding	980,021	503,227
Released, Number of Restricted Stock Units Outstanding	-294,716	'
Forfeited, Number of Restricted Stock Units Outstanding	-93,471	'
Balance at end of period	2,191,554	'
Balance at beginning of period, Weighted Average Grant Date Fair Value	$4.43	'
Granted, Weighted Average Grant Date Fair Value	$4.32	'
Released, Weighted Average Grant Date Fair Value	$5.22	'
Forfeited, Weighted Average Grant Date Fair Value	$3.71	'
Balance at end of period, Weighted Average Grant Date Fair Value	$4.27	'
Balance at beginning of period, Aggregate Intrinsic Value	$6,895	'
Balance at end of period, Aggregate Intrinsic Value	$9,884	'

Information_about_Geographic_A2

Information about Geographic Areas - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2013
	Segment
Segment Reporting [Abstract]	'
Number of business activities	1

Information_about_Geographic_A3

Information about Geographic Areas - Schedule of Revenues and Long-lived Assets by Geographic Area (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Revenue	$20,600	$24,735	'
Long-lived assets	2,455	'	2,451
United States [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Revenue	9,501	14,072	'
Long-lived assets	1,374	'	1,390
United Kingdom [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Revenue	5,110	4,146	'
Asia Pacific [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Revenue	2,279	2,723	'
Rest of EMEA [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Revenue	2,223	2,488	'
Rest of Americas [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Revenue	1,487	1,306	'
India [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Long-lived assets	1,077	'	1,055
Japan [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Long-lived assets	$4	'	$6

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]	'	'
Provision for income taxes	$112	$138

RelatedParty_Transactions_Addi

Related-Party Transactions - Additional Information (Detail) (USD $)	12 Months Ended		3 Months Ended
	Dec. 31, 2011	Dec. 31, 2011	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
		Private Company Co-Founded by Dr. Vaduvur Bharghavan [Member]	Reseller [Member]	Reseller [Member]	Reseller [Member]
			Japan [Member]	Japan [Member]	Japan [Member]
Related Party Transaction [Line Items]	'	'	'	'	'
Amount invested in a company co-founded by Dr. Vaduvur Bharghavan	$1,300,000	$1,300,000	'	'	'
Revenue from related party	'	'	300,000	200,000	'
Accounts receivable from related party	'	'	$132,000	'	$5,000