Meru Networks (MERU) Inactive 10-Q1 Nov 132013 Q3 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2013	Oct. 24, 2013
Document and Entity Information	'	'
Entity Registrant Name	'MERU NETWORKS INC	'
Entity Central Index Key	'0001167294	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-13	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--12-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Smaller Reporting Company	'
Entity Common Stock, Shares Outstanding	'	22,653,000
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:	'	'
Cash and cash equivalents	$34,654	$22,855
Accounts receivable, net	10,592	15,040
Inventory	6,164	8,852
Prepaid expenses and other current assets	1,679	884
Total current assets	53,089	47,631
Property and equipment, net	2,209	2,473
Goodwill	1,658	1,658
Intangible assets, net	193	403
Other assets	1,927	2,024
TOTAL ASSETS	59,076	54,189
CURRENT LIABILITIES:	'	'
Accounts payable	2,606	3,027
Accrued liabilities	12,035	13,053
Long-term debt, current portion	3,581	3,197
Deferred revenue, current portion	13,395	12,183
Total current liabilities	31,617	31,460
Long-term debt, net of current portion	3,775	6,499
Deferred revenue, net of current portion	5,923	6,107
Other liabilities	1,128	530
Total liabilities	42,443	44,596
Commitments and contingencies (Note 10)	'	'
STOCKHOLDERS' EQUITY:	'	'
Preferred stock, $0.0005 par value - 5,000,000 shares authorized; no shares issued and outstanding as of September 30, 2013 and December 31, 2012	'	'
Common stock, $0.0005 par value -150,000,000 shares authorized; 22,616,702 and 18,463,968 shares issued and outstanding as of September 30, 2013 and December 31, 2012	11	9
Additional paid-in capital	280,443	262,887
Accumulated other comprehensive loss	-582	-298
Accumulated deficit	-263,239	-253,005
Total stockholders' equity	16,633	9,593
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$59,076	$54,189

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
CONDENSED CONSOLIDATED BALANCE SHEETS	'	'
Preferred stock, par value (in dollars per share)	$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 (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	22,616,702	18,463,968
Common stock, shares outstanding	22,616,702	18,463,968

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
REVENUES:	'	'	'	'
Products	$19,634,000	$20,910,000	$61,910,000	$57,009,000
Support and services	4,752,000	4,432,000	13,585,000	12,151,000
Ratable products and services	14,000	44,000	91,000	136,000
Total revenues	24,400,000	25,386,000	75,586,000	69,296,000
COSTS OF REVENUES:	'	'	'	'
Products	6,567,000	7,191,000	21,251,000	19,791,000
Support and services	1,853,000	1,764,000	5,517,000	4,737,000
Ratable products and services	8,000	24,000	47,000	79,000
Total costs of revenues	8,428,000	8,979,000	26,815,000	24,607,000
Gross margin	15,972,000	16,407,000	48,771,000	44,689,000
OPERATING EXPENSES:	'	'	'	'
Research and development	3,726,000	4,072,000	11,388,000	11,611,000
Sales and marketing	12,306,000	13,830,000	36,074,000	44,383,000
General and administrative	3,036,000	3,496,000	9,614,000	11,729,000
Litigation reserve	'	'	'	2,350,000
Total operating expenses	19,068,000	21,398,000	57,076,000	70,073,000
Loss from operations	-3,096,000	-4,991,000	-8,305,000	-25,384,000
Interest expense, net	-414,000	-721,000	-1,577,000	-1,010,000
Other income (expense), net	24,000	35,000	-27,000	49,000
Loss before provision for income taxes	-3,486,000	-5,677,000	-9,909,000	-26,345,000
Provision for income taxes	97,000	119,000	324,000	410,000
Net loss	-3,583,000	-5,796,000	-10,233,000	-26,755,000
Net loss per share of common stock:	'	'	'	'
Basic and diluted (in dollars per share)	($0.16)	($0.32)	($0.48)	($1.50)
Shares used in computing net loss per share of common stock:	'	'	'	'
Basic (in shares)	22,525,060	18,014,335	21,465,492	17,854,199
Diluted (in shares)	22,525,060	18,014,335	21,465,492	17,854,199
Includes stock-based compensation expense as follows:	'	'	'	'
Stock-based compensation expense	1,300,000	1,800,000	4,600,000	5,800,000
Costs of revenues	'	'	'	'
Includes stock-based compensation expense as follows:	'	'	'	'
Stock-based compensation expense	86,000	73,000	185,000	251,000
Research and development	'	'	'	'
Includes stock-based compensation expense as follows:	'	'	'	'
Stock-based compensation expense	175,000	300,000	545,000	909,000
Sales and marketing	'	'	'	'
Includes stock-based compensation expense as follows:	'	'	'	'
Stock-based compensation expense	446,000	638,000	1,565,000	2,176,000
General and administrative	'	'	'	'
Includes stock-based compensation expense as follows:	'	'	'	'
Stock-based compensation expense	$636,000	$760,000	$2,256,000	$2,456,000

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS	'	'	'	'
Net loss	($3,583)	($5,796)	($10,233)	($26,755)
Other comprehensive loss, net of tax:	'	'	'	'
Foreign currency translation adjustment	-104	89	-284	-31
Other comprehensive income (loss), net of tax	-104	89	-284	-31
Comprehensive loss	($3,687)	($5,707)	($10,517)	($26,786)

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net loss:	($10,233)	($26,755)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	1,155	968
Stock-based compensation	4,551	5,792
Accrued interest on long-term debt	673	414
Amortization of issuance costs	178	98
Provision for (recovery of) bad debt	-5	25
Changes in operating assets and liabilities:	'	'
Accounts receivable	4,452	7,608
Inventory	2,688	-3,522
Prepaid expenses and other assets	-832	-454
Accounts payable	-421	-3,146
Accrued liabilities	-987	-46
Deferred revenue	1,027	1,257
Net cash provided by (used in) operating activities	2,246	-17,761
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Purchase of property and equipment	-832	-2,343
Proceeds from maturities of short-term investments	'	5,000
Net cash provided by (used in) investing activities	-832	2,657
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from the issuance of common stock, net of offering costs	12,574	'
Proceeds from long-term debt, net of issuance costs	'	11,489
Proceeds from exercise of stock options	249	73
Proceeds from employee stock purchase plan	358	279
Taxes paid related to net share settlement of equity awards	-174	-114
Repayment of long-term debt	-2,517	-788
Net cash provided by financing activities	10,490	10,939
Effect of exchange rate changes on cash and cash equivalents	-105	3
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	11,799	-4,162
CASH AND CASH EQUIVALENTS - Beginning of period	22,855	35,259
CASH AND CASH EQUIVALENTS - End of period	34,654	31,097
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:	'	'
Cash paid for interest	825	341
Cash paid for income taxes	308	261
NONCASH INVESTING AND FINANCING ACTIVITIES:	'	'
Issuance of common stock warrants in connection with debt financing	'	$384

Business_and_Summary_of_Signif

Business and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Business and Summary of Significant Accounting Policies	'
Business and Summary of Significant Accounting Policies	'
	1. Business and Summary of Significant Accounting Policies

	Business — Meru Networks, Inc. (“Meru”) was incorporated in Delaware in January 2002. Meru and its wholly owned subsidiaries (collectively, the “Company”) develop and market a virtualized wireless Local Area Network (“LAN”) solution. The Company’s solution is built around its patented 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 principally sold through value added resellers and distributors with the assistance of the Company’s sales force, and are also sold directly by the Company.

	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, 2012, filed on March 20, 2013. The condensed consolidated balance sheet as of December 31, 2012, 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 September 30, 2013 and December 31, 2012, the Company’s results of operations for the three and nine months ended September 30, 2013 and 2012, comprehensive loss for the three and nine months ended September 30, 2013 and 2012, and its cash flows for the nine months ended September 30, 2013 and 2012. The results for the three and nine months ended September 30, 2013 are not necessarily indicative of the results to be expected for the year ending December 31, 2013. All references to September 30, 2013 or to the three and nine months ended September 30, 2013 and 2012 in the notes to the condensed consolidated financial statements are unaudited. Certain reclassifications have been made to prior period amounts to conform to the current period presentation. These reclassifications had no impact on total assets, stockholder’s equity or net loss.

	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 implicit service periods for revenue recognition, reserves for loss contingencies (including litigation settlement costs), sales returns and allowances, allowance for doubtful accounts, inventory valuation, reserve for warranty costs, valuation of deferred tax assets, and stock-based compensation expense. 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 may be unable to raise additional funds or to do so on favorable terms; the Company has a limited operating history; the Company expects to incur operating losses throughout 2013; the Company may be unable to compete in a rapidly evolving market and to respond quickly and effectively to changing market requirements; the Company may be unable to increase market awareness of its brand and products and develop and expand its sales channels; the Company competes in highly competitive markets and is subject to various competitive pressures; the Company must hire, integrate and retain qualified personnel; the Company’s investments may not generate anticipated revenues; 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; average sales prices for the Company’s products may decline; gross margins for the Company’s products and services may vary; the Company may be unable to forecast customer demand accurately in making purchase decisions; the Company relies on channel partners to generate a substantial majority of its revenues and these partners may fail to perform; 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 September 30, 2013, two distributor customers accounted for 49% of the Company’s net accounts receivable. As of December 31, 2012, three distributor customers accounted for 68% of the Company’s net accounts receivable. The Company usually does not require collateral on accounts receivable. As of September 30, 2013 and December 31, 2012, the allowance for doubtful accounts was immaterial.

	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. In addition, the Company considers major service groups, geographies, customer classifications, and other variables in determining VSOE.

	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, competitive landscapes, geographies, customer classes and distribution channels.

	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 three and nine months ended September 30, 2013 and 2012.

	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 all 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.

	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 and nine months ended September 30, 2013 and 2012.

	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 September 30, 2013, 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 product sales 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 September 30, 2013 is as follows (in thousands):

		September 30,
		2013
	Accrued warranty balance — January 1, 2013	$	870
	Warranty costs incurred	(77		)
	Provision for warranty	415
	Accrued warranty balance — September 30, 2013	$	1,208

Recently_Issued_Accounting_Pro

Recently Issued Accounting Pronouncements	9 Months Ended
Recently Issued Accounting Pronouncements	Sep. 30, 2013
Recently Issued Accounting Pronouncements	'
Recently Issued Accounting Pronouncements	'
	2. Recently Issued Accounting Pronouncements

	In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists — a consensus of the FASB Emerging Issues Task Force, which requires an entity to present an unrecognized tax benefit as a reduction to a deferred tax asset for a net operating loss (NOL) or similar tax loss or tax credit carryforward, unless the uncertain tax position is not available to reduce, or would not be used to reduce, the NOL or carryforward under the tax law in the same jurisdiction; otherwise, the unrecognized tax benefit should be presented gross as a liability. The guidance is effective prospectively for fiscal years, and interim periods beginning after December 15, 2013 for public entities. Early adoption and retrospective application are permitted. The Company will adopt this standard in the first quarter of 2014 and does not expect the adoption to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2013
Accumulated Other Comprehensive Loss	'
Accumulated Other Comprehensive Loss	'
	3. Accumulated Other Comprehensive Loss

	Changes in accumulated other comprehensive loss for the nine months ended September 30, 2013 is as follows (in thousands):

		Currency Translation
		Adjustment
	Beginning balance at January 1, 2013	$	(298	)
	Other comprehensive loss before reclassifications	(284		)
	Net current-period other comprehensive loss	(284		)
	Ending balance at September 30, 2013	$	(582	)

Inventory

Inventory	9 Months Ended
	Sep. 30, 2013
Inventory	'
Inventory	'
	4. Inventory

	Inventory as of September 30, 2013 and December 31, 2012 is as follows (in thousands):

		September 30,		December 31,
		2013		2012
	Finished goods	$	5,675	$	8,264
	Channel inventory	489		588
	Inventory	$	6,164	$	8,852

Net_Loss_Per_Share_of_Common_S

Net Loss Per Share of Common Stock	9 Months Ended
	Sep. 30, 2013
Net Loss Per Share of Common Stock	'
Net Loss Per Share of Common Stock	'
	5. 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, common stock subject to repurchase, 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 and Nine Months Ended September 30,
		2013	2012
	Stock awards and stock options to purchase common stock *	4,889,344	4,967,085
	Common stock warrants	3,192,250	3,192,250


	* Includes 209,500 and 191,581 shares, which were expected to be issued pursuant to the Company’s Employee Stock Purchase Plan as of September 30, 2013 and 2012, based on employee enrollment.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2013

Fair Value of Financial Instruments

6. 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 September 30, 2013 and December 31, 2012.

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 nine months ended September 30, 2013.

As of September 30, 2013, the Company’s fair value hierarchy for its financial assets was as follows (in thousands):

September 30, 2013

Quoted Prices in Active

Significant Other

Significant

Total

Markets for Identical

Observable

Unobservable

Instruments

(Level I)

(Level II)

(Level III)

Fair Value

Assets:

Money market funds

15,084

—

15,084

As of December 31, 2012, the Company’s fair value hierarchy for its financial assets was as follows (in thousands):

December 31, 2012

Quoted Prices in Active

Significant Other

Significant

Total

Markets for Identical

Observable

Unobservable

Instruments

(Level I)

(Level II)

(Level III)

Fair Value

Assets:

Money market funds

15,084

—

15,084

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	9 Months Ended
Goodwill and Intangible Assets	Sep. 30, 2013
Goodwill and Intangible Assets	'
Goodwill and Intangible Assets	'
	7. 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 September 30, 2013
		Estimated		Gross			Accumulated			Net
		Useful Life		Value			Amortization			Value
	Developed technology	3 years		$	630		$	(437	)	$	193
	Customer relationships	2 years		160			(160		)	—
	Total			$	790		$	(597	)	$	193

		As of December 31, 2012
		Estimated		Gross			Accumulated			Net
		Useful Life		Value			Amortization			Value
	Developed technology	3 years		$	630		$	(280	)	$	350
	Customer relationships	2 years		160			(107		)	53
	Total			$	790		$	(387	)	$	403

	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 September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Costs of products revenues	$	52		$	52		$	157		$	157
	Sales and marketing	13			20			53			60
	Total amortization expense	$	65		$	72		$	210		$	217

	As of September 30, 2013, the estimated aggregate future amortization expense in future years is as follows (in thousands):

	Fiscal Years:
	2013 (remainder)	$	53
	2014	140
	Total	$	193

Cost_Method_Investments

Cost Method Investments	9 Months Ended
Cost Method Investments	Sep. 30, 2013
Cost Method Investments	'
Cost Method Investments	'
	8. 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 September 30, 2013 and December 31, 2012. 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 and nine months ended September 30, 2013 and 2012. The Company has not elected to use the fair value method for this investment.

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2013
Borrowings	'
Borrowings	'
	9. 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 September 30, 2013, 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 additional interest expense of $0.2 million during each of the three months ended September 30, 2013 and 2012, and $0.6 million and $0.3 million during the nine months ended September 30, 2013 and 2012, respectively, 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 net interest expense related to the debt discounts of $54,000 and $76,000 during the three months ended September 30, 2013 and 2012 and $0.2 million and $98,000 during the nine months ended September 30, 2013 and 2012. As of September 30, 2013, the remaining unamortized amount of the debt discounts was $200,000, of which $154,000 was classified as a current debt discount.

	The scheduled principal payments for the Company’s long-term debt under the VLL Agreement as of September 30, 2013 are as follows (in thousands):

		Long-term Debt
	Fiscal Years:
	2013 (remainder)	$	890
	2014	3,839
	2015	2,827
	Total	7,556
	Less: unamortized discounts	(200		)
	Less: current portion	(3,581		)
	Long-term debt, net of current portion	$	3,775

	The Company had a Loan and Security Agreement with Silicon Valley Bank, dated January 29, 2007 (as amended, the “SVB Agreement”), which provided a working capital line of credit of $7.0 million based on eligible accounts receivable. On July 31, 2012, the Company renewed the line of credit for twelve months pursuant to an amendment to the SVB Agreement. This working capital line of credit under the SVB Agreement expired on July 31, 2013. As of September 30, 2013 and December 31, 2012, the total amount outstanding under the line of credit was zero.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies	'
Commitments and Contingencies	'
	10. Commitments and Contingencies

	Legal Matters

	On April 13, 2012, the Company and Extricom Ltd. (“Extricom”) entered into a settlement, license and release agreement (the “Extricom Agreement”). Pursuant to the Extricom Agreement, the Company and Extricom each agreed to:

	· Provide one another with perpetual, fully paid up, non-exclusive worldwide licenses to each of their respective patent portfolios as of the settlement date; and

	· Release one another from certain claims based on infringement or alleged infringement of certain patent rights, including dismissal of then pending litigation.

	As part of the Extricom Agreement, the Company paid Extricom $2.4 million in April 2012. In evaluating the accounting treatment for this transaction, the Company identified the following specific items the Company received from the Extricom Agreement: (1) release of claims for past infringement and (2) a license under the Extricom patents. The Company does not believe the Extricom license will provide future value as the Company does not plan to develop, manufacture or sell any products covered by the Extricom patents or to otherwise exercise the licensed rights. Since the Extricom Agreement released and avoided certain litigation for the Company, but provided no other future benefits to the Company, the Company expensed the full $2.4 million in the first quarter of the Company’s fiscal year 2012.

	Operating Leases — The Company leases office space for its headquarters in Sunnyvale, California under a noncancelable operating lease that expires in 2015. In addition, the Company leases space for a research and development facility in Bangalore, India pursuant to an operating lease that expires in 2016, which is noncancelable prior to 2014. The Company has the option to renew the lease in Bangalore, India 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:
	2013 (remainder)	$	410
	2014	1,284
	2015	237
	2016	50
	Total	$	1,981

	Other commitments as of September 30, 2013 totaled approximately $8.5 million and consisted of inventory and other non-cancelable 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 October 2010, a complaint was filed by EON Corp. IP Holdings LLC against the Company and numerous other defendants, including Cisco, Sprint, HTC and Aruba Networks, in the United States District Court for the Eastern District of Texas, Marshall Division. The complaint alleges infringement by the defendants of U.S. Patent No. 5,592,491 (“491 Patent”). The Company’s initial attempts at informally resolving the action were unsuccessful. The defendants filed a joint motion to transfer the case to the Northern District of California, and on January 9, 2012, the Texas court granted the motion to transfer. On August 13, 2012, the Company answered EON’s second amended complaint, denying the allegations, and asserting that the EON patent is not infringed and is invalid. The case is currently pending before the Honorable Jon S. Tigar. A pre-trial Markman claim construction hearing was held on May 10, 2013 and on July 8, 2013, Judge Tigar issued a Markman Order construing and determining the validity of certain claims of the ‘491 Patent. The parties are currently working to confirm dates for a mediation session. Trial has been set for October 20, 2014. While a loss is reasonably possible, the Company is unable to estimate the potential amount of any loss at this time, because the matter involves unresolved questions of fact and law, including with respect to validity and infringement, and there have been no case-dispositive motions filed. Accordingly, the Company cannot estimate the potential financial impact this action could have on the Company’s business, operating results, cash flows or financial position.

	In May 2011, Linex Technologies, Inc. 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 the 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. Opening Markman and dispositive motions are due on November 7, 2013. A court-ordered mediation session has not yet been scheduled. This case is still in its discovery stage and 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 early 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 the Company’s 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. The Company filed its answer to the complaint on October 8, 2012. The case is now pending before the Honorable Leonard P. Stark. The court has scheduled a claim construction hearing for April 11, 2014. The court has not yet set a trial date. Discovery has only just begun, 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 early 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 the Company’s 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 — Our customer agreements generally include certain provisions for indemnifying such customers against certain liabilities, including if our products infringe a third party’s intellectual property rights. From time to time, we receive requests for indemnification from our customers. We review these requests on a case-by-case basis and may choose to assume the defense of such litigation asserted against our customers. We have 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 us. To date, we have not incurred any material costs as a result of such indemnification provisions and we have not accrued any liabilities related to such obligations in the accompanying condensed consolidated financial statements.

	In addition, our 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, we have 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 us, 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.

Warrants_for_Common_Stock

Warrants for Common Stock	9 Months Ended
	Sep. 30, 2013
Warrants for Common Stock	'
Warrants for Common Stock	'
	11. 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	0.7	%
	Expected life (in years)	5
	Expected volatility	59.1	%

	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 September 30, 2013, 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 are exercisable, have exercise prices ranging from $9.78 to $11.74 and expire in 2014. During the years ended 2011 and 2010, warrants to purchase 1,265,293 and 54,764 shares were exercised utilizing a cashless exercise provision. There were no exercises in 2012 and during the nine months ended September 30, 2013. As of September 30, 2013, the remaining warrants to purchase 2,723,957 shares of common stock at a weighted average exercise price of $10.76 per share have not been exercised and were still outstanding.

Equity_Incentive_Plans

Equity Incentive Plans	9 Months Ended
Equity Incentive Plans	Sep. 30, 2013
Equity Incentive Plans	'
Equity Incentive Plans	'
	12. 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 September 30, 2013, 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 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 compensation committee of the board of directors, as specified under the Listing Rules of the Nasdaq Stock Market. As of September 30, 2013, 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 80,000 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 $1.3 million and $1.8 million during the three months ended September 30, 2013 and 2012 and was $4.6 million and $5.8 million during the nine months ended September 30, 2013 and 2012, respectively.

	Determining Fair Value of Stock Options

	The fair value of stock options granted during the three and nine months ended September 30, 2013 and 2012 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 based on the historical stock volatilities of a peer group of publicly listed companies combined with the Company’s historical data over a period equal to the expected terms of the options as the Company did not have a sufficient trading history to use the volatility of its own common stock.

	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 currently 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 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 and nine months ended September 30, 2013 and 2012:

			Three Months Ended September 30,				Nine Months Ended September 30,
			2013		2012		2013		2012
	Dividend rate		0	%	0	%	0	%	0	%
	Risk-free interest rate		1	%	0.7	%	0.7	%	0.9	%
	Expected life (in years)		4.2		4.8		4.1		4.9
	Expected volatility		72.8	%	65.6	%	71.5	%	61.7	%

	A summary of the Company’s stock award activity during the nine months ended September 30, 2013 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, 2013		1,752,468		3,515,952		$	5.07		8.2		$	396
	Additional options authorized		738,559		—		—
	Inducement shares authorized		500,000		—		—
	Options granted		(386,175	)	386,175		3.59
	Inducement restricted stock units granted		(315,000	)	—		—
	Restricted stock granted		(1,336,427	)	—		—
	Cancelled options		858,694		(858,694	)	5.97
	Restricted stock returned		314,218		—		—
	Exercised options		—		(69,073	)	3.88
	Outstanding — September 30, 2013		2,126,337		2,974,360		$	4.65		8.1		$	594
	Vested and expected to vest — September 30, 2013				2,325,044		$	4.77		7.9		$	466
	Vested — September 30, 2013				1,289,885		$	5.79		7.2		$	186

The aggregate intrinsic value of options exercised was $7,000 and $0.1 million for the three months ended September 30, 2013 and 2012 and was $86,000 and $0.1 million for the nine months ended September 30, 2013 and 2012, determined as of the date of option exercise.

Additional information regarding the Company’s stock options outstanding and vested as of September 30, 2013 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		331,738		8.5		$	1.67		106,921		$	1.67
$2.18 - $4.33		1,267,103		8.8		$	3.4		350,980		$	3.4
$4.34 - $6.50		938,486		7.8		$	4.9		427,904		$	4.9
$6.51 - $8.67		282,314		6.2		$	7.88		268,005		$	7.88
$8.68 - $21.68		154,719		6.6		$	13.77		136,075		$	13.66
		2,974,360		8.1		$	4.65		1,289,885		$	5.79

As of September 30, 2013, total compensation cost related to unvested stock-based awards granted to employees, but not yet recognized, was $8.8 million, net of estimated forfeitures. This cost will be amortized on a straight-line basis over a weighted-average remaining period of 2.5 years and will be adjusted for subsequent changes in estimated forfeitures. Future option grants increase the amount of compensation expense that will be recorded.

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.

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, (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 StockAwards 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 three months 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. In addition, the vesting of some RSUs is performance based and the vesting of those RSUs is subject to the achievement of specific performance metrics in addition to continued service.

During the nine months ended September 30, 2013, the Company issued 1,651,427 RSUs, of which 315,000 RSUs were issued from the 2013 Plan and 1,336,427 RSUs were issued from the 2010 Plan. The Company recognized stock-based compensation in the amount of $1.0 million for RSAs and RSUs awarded during each of the three months ended September 30, 2013 and 2012 and $3.0 million and $2.6 million for RSAs and RSUs awarded during the nine months ended September 30, 2013 and 2012, respectively.

A summary of the Company’s RSA activity during the nine months ended September 30, 2013 is presented below:

		Number		Weighted			Aggregate
		of Restricted		Average Grant			Intrinsic
		Stock Awards		Date Fair			Value
		Outstanding		Value			(in thousands)
Outstanding — January 1, 2013		2,400		$	13.73		$	6
Restricted stock awards granted		—		—
Restricted stock awards released		(1,200	)	13.73
Restricted stock awards forfeited		(1,200	)	13.73
Outstanding — September 30, 2013		—		$	—		$	—

A summary of the Company’s RSU activity during the nine months September 30, 2013 is presented below:

		Number		Weighted			Aggregate
		of Restricted		Average Grant			Intrinsic
		Stock Units		Date Fair			Value
		Outstanding		Value			(in thousands)
Outstanding — January 1, 2013		809,542		$	7.32		$	2,145
Restricted stock units granted		1,651,427		3.93
Restricted stock units released		(485,607	)	5.94
Restricted stock units forfeited		(269,878	)	5.9
Outstanding — September 30, 2013		1,705,484		$	4.65		$	5,577

The majority of the RSUs that vested in the nine months ended September 30, 2013 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 nine months ended September 30, 2013, 486,807 RSUs and RSAs vested with an intrinsic value of approximately $1.9 million. The Company withheld 43,140 of these shares to satisfy approximately $0.2 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 calculated the compensation expense for the ESPP using the Black-Scholes option-pricing model with the following weighted-average assumptions during the three and nine months ended September 30, 2013 and 2012:

		Three Months Ended September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
Dividend rate		0	%	0	%	0	%	0	%
Risk-free interest rate		0.1	%	0.2	%	0.1	%	0.1	%
Expected life (in years)		0.8		0.5		0.8		0.5
Expected volatility		96	%	79.9	%	96	%	70.6	%

The Company recognized compensation expense related to the ESPP in the amount of $0.1 million and $67,000 for the three months ended September 30, 2013 and 2012 and $0.4 million and $0.3 million for the nine months ended September 30, 2013 and 2012. The Company issued 189,994 shares of common stock during the nine months ended September 30, 2013. The Company had 253,055 shares of its common stock available for future issuance under the ESPP as of September 30, 2013.

Information_about_Geographic_A

Information about Geographic Areas	9 Months Ended
Information about Geographic Areas	Sep. 30, 2013
Information about Geographic Areas	'
Information about Geographic Areas	'
	13. 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 September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
	United States	$	11,373	$	13,756	$	40,547	$	35,354
	United Kingdom	5,767		5,406		14,023		14,906
	Rest of EMEA	2,896		2,939		8,435		8,085
	Asia Pacific	2,094		2,055		7,193		6,677
	Rest of Americas	2,270		1,230		5,388		4,274
	Total	$	24,400	$	25,386	$	75,586	$	69,296

	Long-Lived Assets

	The following table sets forth long-lived assets by geographic area (in thousands):

		September 30,		December 31,
		2013		2012
	United States	$	1,352	$	1,328
	India	850		1,131
	Japan	7		14
	Total	$	2,209	$	2,473

Income_Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2013
Income Taxes	'
Income Taxes	'
	14. Income Taxes

	The Company’s provision for income taxes was $0.1 million for each of the three months ended September 30, 2013 and 2012 and was $0.3 million and $0.4 million for the nine months ended September 30, 2013 and 2012, 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	9 Months Ended
Related-Party Transactions	Sep. 30, 2013
Related-Party Transactions	'
Related-Party Transactions	'
	15. 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 8 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 nine months ended September 30, 2013 and 2012. The total revenue from this related party amounted to $0.1 million and $0.2 million for the three months ended September 30, 2013, and 2012 and $0.5 million and $0.6 million for each of the nine months ended September 30, 2013 and 2012. Accounts receivable from the reseller were $63,000 and $16,000 as of September 30, 2013 and December 31, 2012.

	The Company has a distributor in Japan that was a related party by virtue of its ownership of shares of the Company’s stock in 2012. However, as of December 31, 2012, this distributor is no longer a related party due to the fact that it no longer owns shares of the Company’s stock. The total revenue from this related party amounted to $0.4 million and $1.3 million for the three and nine months ended September 30, 2012.

Business_and_Summary_of_Signif1

Business and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Business and Summary of Significant Accounting Policies	'
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, 2012, filed on March 20, 2013. The condensed consolidated balance sheet as of December 31, 2012, 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 September 30, 2013 and December 31, 2012, the Company’s results of operations for the three and nine months ended September 30, 2013 and 2012, comprehensive loss for the three and nine months ended September 30, 2013 and 2012, and its cash flows for the nine months ended September 30, 2013 and 2012. The results for the three and nine months ended September 30, 2013 are not necessarily indicative of the results to be expected for the year ending December 31, 2013. All references to September 30, 2013 or to the three and nine months ended September 30, 2013 and 2012 in the notes to the condensed consolidated financial statements are unaudited. Certain reclassifications have been made to prior period amounts to conform to the current period presentation. These reclassifications had no impact on total assets, stockholder’s equity or net loss.

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 implicit service periods for revenue recognition, reserves for loss contingencies (including litigation settlement costs), sales returns and allowances, allowance for doubtful accounts, inventory valuation, reserve for warranty costs, valuation of deferred tax assets, and stock-based compensation expense. 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 may be unable to raise additional funds or to do so on favorable terms; the Company has a limited operating history; the Company expects to incur operating losses throughout 2013; the Company may be unable to compete in a rapidly evolving market and to respond quickly and effectively to changing market requirements; the Company may be unable to increase market awareness of its brand and products and develop and expand its sales channels; the Company competes in highly competitive markets and is subject to various competitive pressures; the Company must hire, integrate and retain qualified personnel; the Company’s investments may not generate anticipated revenues; 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; average sales prices for the Company’s products may decline; gross margins for the Company’s products and services may vary; the Company may be unable to forecast customer demand accurately in making purchase decisions; the Company relies on channel partners to generate a substantial majority of its revenues and these partners may fail to perform; 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 September 30, 2013, two distributor customers accounted for 49% of the Company’s net accounts receivable. As of December 31, 2012, three distributor customers accounted for 68% of the Company’s net accounts receivable. The Company usually does not require collateral on accounts receivable. As of September 30, 2013 and December 31, 2012, the allowance for doubtful accounts was immaterial.

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. In addition, the Company considers major service groups, geographies, customer classifications, and other variables in determining VSOE.

	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, competitive landscapes, geographies, customer classes and distribution channels.

	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 three and nine months ended September 30, 2013 and 2012.

	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 all 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.

	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 and nine months ended September 30, 2013 and 2012.

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 September 30, 2013, 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 product sales 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 September 30, 2013 is as follows (in thousands):

		September 30,
		2013
	Accrued warranty balance — January 1, 2013	$	870
	Warranty costs incurred	(77		)
	Provision for warranty	415
	Accrued warranty balance — September 30, 2013	$	1,208

Business_and_Summary_of_Signif2

Business and Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2013
Business and Summary of Significant Accounting Policies	'
Schedule of accrued warranty	'
	Accrued warranty, which is included in accrued liabilities on the condensed consolidated balance sheets, as of September 30, 2013 is as follows (in thousands):

		September 30,
		2013
	Accrued warranty balance — January 1, 2013	$	870
	Warranty costs incurred	(77		)
	Provision for warranty	415
	Accrued warranty balance — September 30, 2013	$	1,208

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2013
Accumulated Other Comprehensive Loss	'
Schedule of changes in accumulated other comprehensive loss	'
	Changes in accumulated other comprehensive loss for the nine months ended September 30, 2013 is as follows (in thousands):

		Currency Translation
		Adjustment
	Beginning balance at January 1, 2013	$	(298	)
	Other comprehensive loss before reclassifications	(284		)
	Net current-period other comprehensive loss	(284		)
	Ending balance at September 30, 2013	$	(582	)

Inventory_Tables

Inventory (Tables)	9 Months Ended
	Sep. 30, 2013
Inventory	'
Schedule of inventory	'
	Inventory as of September 30, 2013 and December 31, 2012 is as follows (in thousands):

		September 30,		December 31,
		2013		2012
	Finished goods	$	5,675	$	8,264
	Channel inventory	489		588
	Inventory	$	6,164	$	8,852

Net_Loss_Per_Share_of_Common_S1

Net Loss Per Share of Common Stock (Tables)	9 Months Ended
	Sep. 30, 2013
Net Loss Per Share of Common Stock	'
Schedule of outstanding shares of common stock and common stock equivalents excluded from the computation of diluted net loss per share of common stock	'


		Three and Nine Months Ended September 30,
		2013	2012
	Stock awards and stock options to purchase common stock *	4,889,344	4,967,085
	Common stock warrants	3,192,250	3,192,250


	* Includes 209,500 and 191,581 shares, which were expected to be issued pursuant to the Company’s Employee Stock Purchase Plan as of September 30, 2013 and 2012, based on employee enrollment.

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value of Financial Instruments

Schedule of fair value of financial assets

As of September 30, 2013, the Company’s fair value hierarchy for its financial assets was as follows (in thousands):

September 30, 2013

Quoted Prices in Active

Significant Other

Significant

Total

Markets for Identical

Observable

Unobservable

Instruments

(Level I)

(Level II)

(Level III)

Fair Value

Assets:

Money market funds

15,084

—

15,084

As of December 31, 2012, the Company’s fair value hierarchy for its financial assets was as follows (in thousands):

December 31, 2012

Quoted Prices in Active

Significant Other

Significant

Total

Markets for Identical

Observable

Unobservable

Instruments

(Level I)

(Level II)

(Level III)

Fair Value

Assets:

Money market funds

15,084

—

15,084

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	9 Months Ended
Goodwill and Intangible Assets (Tables)	Sep. 30, 2013
Goodwill and Intangible Assets	'
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 September 30, 2013
		Estimated		Gross			Accumulated			Net
		Useful Life		Value			Amortization			Value
	Developed technology	3 years		$	630		$	(437	)	$	193
	Customer relationships	2 years		160			(160		)	—
	Total			$	790		$	(597	)	$	193

		As of December 31, 2012
		Estimated		Gross			Accumulated			Net
		Useful Life		Value			Amortization			Value
	Developed technology	3 years		$	630		$	(280	)	$	350
	Customer relationships	2 years		160			(107		)	53
	Total			$	790		$	(387	)	$	403
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 September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Costs of products revenues	$	52		$	52		$	157		$	157
	Sales and marketing	13			20			53			60
	Total amortization expense	$	65		$	72		$	210		$	217
Schedule of estimated aggregate future amortization expense in future years	'
	As of September 30, 2013, the estimated aggregate future amortization expense in future years is as follows (in thousands):

	Fiscal Years:
	2013 (remainder)	$	53
	2014	140
	Total	$	193

Borrowings_Tables

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2013
Borrowings	'
Schedule of principal payments for the Company's long-term debt	'
	The scheduled principal payments for the Company’s long-term debt under the VLL Agreement as of September 30, 2013 are as follows (in thousands):

		Long-term Debt
	Fiscal Years:
	2013 (remainder)	$	890
	2014	3,839
	2015	2,827
	Total	7,556
	Less: unamortized discounts	(200		)
	Less: current portion	(3,581		)
	Long-term debt, net of current portion	$	3,775

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies	'
Schedule of commitments under operating leases	'
	Commitments under these operating leases are as follows (in thousands):

		Operating Leases
	Fiscal Years:
	2013 (remainder)	$	410
	2014	1,284
	2015	237
	2016	50
	Total	$	1,981

Warrants_for_Common_Stock_Tabl

Warrants for Common Stock (Tables)	9 Months Ended
Warrants for Common Stock (Tables)	Sep. 30, 2013
Warrants for Common Stock	'
Schedule of assumptions used to determine the fair value of warrants	'


		June 2012
	Dividend rate	0	%
	Risk-free interest rate	0.7	%
	Expected life (in years)	5
	Expected volatility	59.1	%

Equity_Incentive_Plans_Tables

Equity Incentive Plans (Tables)	9 Months Ended
Equity Incentive Plans (Tables)	Sep. 30, 2013
Equity Incentive Plans	'
Schedule of weighted-average assumptions used to estimate the fair value of each employee stock option	'


		Three Months Ended September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
	Dividend rate	0	%	0	%	0	%	0	%
	Risk-free interest rate	1	%	0.7	%	0.7	%	0.9	%
	Expected life (in years)	4.2		4.8		4.1		4.9
	Expected volatility	72.8	%	65.6	%	71.5	%	61.7	%
Summary of stock award activity	'


									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, 2013	1,752,468		3,515,952		$	5.07		8.2	$	396
	Additional options authorized	738,559		—		—
	Inducement shares authorized	500,000		—		—
	Options granted	(386,175	)	386,175		3.59
	Inducement restricted stock units granted	(315,000	)	—		—
	Restricted stock granted	(1,336,427	)	—		—
	Cancelled options	858,694		(858,694	)	5.97
	Restricted stock returned	314,218		—		—
	Exercised options	—		(69,073	)	3.88
	Outstanding — September 30, 2013	2,126,337		2,974,360		$	4.65		8.1	$	594
	Vested and expected to vest — September 30, 2013			2,325,044		$	4.77		7.9	$	466
	Vested — September 30, 2013			1,289,885		$	5.79		7.2	$	186
Schedule of additional information regarding the entity's stock options outstanding and vested	'


		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	331,738		8.5		$	1.67		106,921	$	1.67
	$2.18 - $4.33	1,267,103		8.8		$	3.4		350,980	$	3.4
	$4.34 - $6.50	938,486		7.8		$	4.9		427,904	$	4.9
	$6.51 - $8.67	282,314		6.2		$	7.88		268,005	$	7.88
	$8.68 - $21.68	154,719		6.6		$	13.77		136,075	$	13.66
		2,974,360		8.1		$	4.65		1,289,885	$	5.79
Summary of RSA activity	'

		Number		Weighted			Aggregate
		of Restricted		Average Grant			Intrinsic
		Stock Awards		Date Fair			Value
		Outstanding		Value			(in thousands)
	Outstanding — January 1, 2013	2,400		$	13.73		$	6
	Restricted stock awards granted	—		—
	Restricted stock awards released	(1,200	)	13.73
	Restricted stock awards forfeited	(1,200	)	13.73
	Outstanding — September 30, 2013	—		$	—		$	—
Summary of RSU activity	'

		Number		Weighted			Aggregate
		of Restricted		Average Grant			Intrinsic
		Stock Units		Date Fair			Value
		Outstanding		Value			(in thousands)
	Outstanding — January 1, 2013	809,542		$	7.32		$	2,145
	Restricted stock units granted	1,651,427		3.93
	Restricted stock units released	(485,607	)	5.94
	Restricted stock units forfeited	(269,878	)	5.9
	Outstanding — September 30, 2013	1,705,484		$	4.65		$	5,577
Schedule of weighted-average assumptions used to calculate the compensation expense for the ESPP	'


		Three Months Ended September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
	Dividend rate	0	%	0	%	0	%	0	%
	Risk-free interest rate	0.1	%	0.2	%	0.1	%	0.1	%
	Expected life (in years)	0.8		0.5		0.8		0.5
	Expected volatility	96	%	79.9	%	96	%	70.6	%

Information_about_Geographic_A1

Information about Geographic Areas (Tables)	9 Months Ended
Information about Geographic Areas (Tables)	Sep. 30, 2013
Information about Geographic Areas	'
Schedule of revenues and long-lived assets by geographic area	'
	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 September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
	United States	$	11,373	$	13,756	$	40,547	$	35,354
	United Kingdom	5,767		5,406		14,023		14,906
	Rest of EMEA	2,896		2,939		8,435		8,085
	Asia Pacific	2,094		2,055		7,193		6,677
	Rest of Americas	2,270		1,230		5,388		4,274
	Total	$	24,400	$	25,386	$	75,586	$	69,296

	Long-Lived Assets

	The following table sets forth long-lived assets by geographic area (in thousands):

		September 30,		December 31,
		2013		2012
	United States	$	1,352	$	1,328
	India	850		1,131
	Japan	7		14
	Total	$	2,209	$	2,473

Business_and_Summary_of_Signif3

Business and Summary of Significant Accounting Policies (Details) (Accounts receivable, Concentration of credit risk, Distributor customer)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
	item	item
Accounts receivable \| Concentration of credit risk \| Distributor customer	'	'
Concentration of credit risk	'	'
Number of significant customers	2	3
Concentration risk percentage	49.00%	68.00%

Business_and_Summary_of_Signif4

Business and Summary of Significant Accounting Policies (Details 2) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Warranty	'
Accrued warranty balance at the beginning of period	$870
Warranty costs incurred	-77
Provision for warranty	415
Accrued warranty balance at the end of period	$1,208
Minimum	'
Revenue Recognition	'
Period for recognition of revenues for support services	'1 year
Maximum	'
Revenue Recognition	'
Period for recognition of revenues for support services	'5 years

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Changes in accumulated other comprehensive loss	'	'	'	'
Balance at the beginning of the period	'	'	($298)	'
Net current-period other comprehensive loss	-104	89	-284	-31
Balance at the end of the period	-582	'	-582	'
Currency Translation Adjustment	'	'	'	'
Changes in accumulated other comprehensive loss	'	'	'	'
Balance at the beginning of the period	'	'	-298	'
Other comprehensive loss before reclassifications	'	'	-284	'
Net current-period other comprehensive loss	'	'	-284	'
Balance at the end of the period	($582)	'	($582)	'

Inventory_Details

Inventory (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Inventory	'	'
Finished goods	$5,675	$8,264
Channel inventory	489	588
Inventory	$6,164	$8,852

Net_Loss_Per_Share_of_Common_S2

Net Loss Per Share of Common Stock (Details)	3 Months Ended		9 Months Ended
Net Loss Per Share of Common Stock (Details)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Stock Purchase Plan	'	'	'	'
Antidilutive securities	'	'	'	'
Shares excluded from the computation of diluted net loss per share of common stock	'	'	209,500	191,581
Stock awards and stock options to purchase common stock	'	'	'	'
Antidilutive securities	'	'	'	'
Shares excluded from the computation of diluted net loss per share of common stock	4,889,344	4,967,085	4,889,344	4,967,085
Common stock warrants	'	'	'	'
Antidilutive securities	'	'	'	'
Shares excluded from the computation of diluted net loss per share of common stock	3,192,250	3,192,250	3,192,250	3,192,250

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (Recurring, USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Quoted Prices in Active Markets for Identical Instruments (Level I)	'	'
Assets:	'	'
Money market funds	$15,084	$15,084
Total Fair Value	'	'
Assets:	'	'
Money market funds	$15,084	$15,084

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Goodwill and Intangible Assets	'	'
Goodwill	$1,658	$1,658

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets (Details 2) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Costs of products revenues

Sales and marketing

Developed technology

Customer relationships

Identifiable intangible assets

Estimated useful life

'3 years

'2 years

Gross value

$790

$630

$160

Accumulated amortization

-597

-387

-437

-280

-160

-107

Net value

193

403

193

350

Total amortization expense

210

217

157

Estimated aggregate future amortization expense

2013 (remainder)

2014

140

Net value

$193

$403

$193

$350

$53

Cost_Method_Investments_Detail

Cost Method Investments (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2013	Dec. 31, 2012
Cost Method Investments	'	'	'
Amount invested in a company co-founded by Dr. Vaduvur Bharghavan	$1.30	'	'
Investment amount included in other assets	'	$1.30	$1.30

Borrowings_Details

Borrowings (Details) (USD $)

Sep. 30, 2013

Dec. 31, 2012

Jun. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Jul. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Long-Term Debt

Line of Credit

item

Period before January 1, 2014

Period on or after January 1, 2014

Borrowings

Amount of debt financing

$12,000,000

Gross proceeds from long-term debt

11,700,000

Debt issuance costs

162,000

Fixed interest rate (as a percent)

12.00%

Number of equal monthly installments

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 agreement

2,000,000

Additional interest expense

200,000

600,000

300,000

Prepayment penalty (as a percent)

100.00%

80.00%

Number of securities that can be purchased from warrants issued (in shares)

468,293

Exercise price of warrants (in dollars per share)

$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

54,000

76,000

200,000

98,000

Current debt discount

154,000

Scheduled principal payments of long-term debt

2013 (remainder)

890,000

2014

3,839,000

2015

2,827,000

Total

7,556,000

Less: unamortized discount

-200,000

Less: current portion

-3,581,000

-3,197,000

Long-term debt, net of current portion

3,775,000

6,499,000

Line of Credit

Maximum borrowing capacity

7,000,000

Tenure of renewal

'12 months

Total amount outstanding

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	9 Months Ended		1 Months Ended	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Apr. 30, 2012	Mar. 31, 2012
	Sep. 30, 2013	Sep. 30, 2012	Extricom Ltd	Extricom Ltd
Commitments and contingencies	'	'	'	'
Amount paid under the agreement	'	'	$2,400,000	'
Amount expensed by the entity	'	2,350,000	'	2,400,000
Operating Leases	'	'	'	'
Additional number of years for which the lease can be renewed	'5 years	'	'	'
Commitments under operating leases	'	'	'	'
2013 (remainder)	410,000	'	'	'
2014	1,284,000	'	'	'
2015	237,000	'	'	'
2016	50,000	'	'	'
Total	1,981,000	'	'	'
Other commitments consisting of inventory and other non-cancelable purchase obligations	$8,500,000	'	'	'

Warrants_for_Common_Stock_Deta

Warrants for Common Stock (Details) (USD $)	1 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2012	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
	Common stock warrant issued in connection with VLL Agreement	Common stock warrant	Common stock warrant	Common stock warrant	Common stock warrant	Common stock warrant	Common stock warrant	Common stock warrant	Common stock warrant
							Minimum	Maximum	Weighted average
Warrants for Convertible Preferred Stock and Common Stock	'	'	'	'	'	'	'	'	'
Number of securities that can be purchased from warrants issued (in shares)	468,293	'	'	'	36,582	4,007,432	'	'	'
Exercise price of warrants (in dollars per share)	$2.05	'	'	'	'	'	$9.78	$11.74	$10.76
Number of warrants to purchase shares exercised (in shares)	'	0	0	1,265,293	54,764	'	'	'	'
Fair value of warrant recorded as debt discount	$384,000	'	'	'	'	'	'	'	'
Warrants outstanding (in shares)	'	2,723,957	'	'	'	'	'	'	'
Assumptions used to determine the fair value of warrants	'	'	'	'	'	'	'	'	'
Dividend rate (as a percent)	0.00%	'	'	'	'	'	'	'	'
Risk-free interest rate (as a percent)	0.70%	'	'	'	'	'	'	'	'
Expected life	'5 years	'	'	'	'	'	'	'	'
Expected volatility (as a percent)	59.10%	'	'	'	'	'	'	'	'

Equity_Incentive_Plans_Details

Equity Incentive Plans (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

1 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Jun. 06, 2013

Sep. 30, 2013

Mar. 31, 2012

Sep. 30, 2013

Stock options

2013 Plan

2010 Plan

Inducement Stock Option Plan

Service-Based Restricted Stock Unit Plan and Agreement

Performance-Based Restricted Stock Unit Plan and Agreement

CEO Inducement Plan and Agreement

Restricted Stock Unit Plans and Agreements

Dr. Bami Bastani, CEO

Stock options

Restricted stock units

Stock options

Restricted stock units

Equity incentive plans

Shares of common stock reserved for future issuance

500,000

Shares granted (in shares)

50,000

Number of restricted stock units issued and outstanding (in shares)

315,000

80,000

Maximum increase in the number of shares reserved for issuance on the first day of each of the company's fiscal years (as a percent)

4.00%

Stock-based compensation expense

$1,300,000

$1,800,000

$4,600,000

$5,800,000

Summary of Assumptions

Dividend rate (as a percent)

0.00%

Risk-free interest rate (as a percent)

1.00%

0.70%

0.90%

Expected life

'4 years 2 months 12 days

'4 years 9 months 18 days

'4 years 1 month 6 days

'4 years 10 months 24 days

Expected volatility (as a percent)

72.80%

65.60%

71.50%

61.70%

Shares Available for Grant

Outstanding at the beginning of the period (in shares)

1,752,468

185,000

Additional options authorized (in shares)

738,559

Inducement shares authorized (in shares)

500,000

Options granted (in shares)

-386,175

-600,000

Inducement restricted stock units granted (in units)

-315,000

Restricted stock granted (in shares)

-1,336,427

Cancelled options (in shares)

858,694

Restricted stock returned (in shares)

314,218

Outstanding at the end of the period (in shares)

2,126,337

185,000

Number of Stock Options Outstanding

Outstanding at the beginning of the period (in shares)

3,515,952

600,000

Options granted (in shares)

386,175

600,000

Cancelled options (in shares)

-858,694

Exercised options (in shares)

-69,073

Outstanding at the end of the period (in shares)

2,974,360

3,515,952

600,000

Vested and expected to vest at the end of the period (in shares)

2,325,044

Vested at the end of the period (in shares)

1,289,885

Weighted-Average Exercise Price

Outstanding at the beginning of the period (in dollars per share)

$5.07

Options granted (in dollars per share)

$3.59

Cancelled options (in dollars per share)

$5.97

Exercised options (in dollars per share)

$3.88

Outstanding at the end of the period (in dollars per share)

$4.65

$5.07

Vested and expected to vest at the end of the period (in dollars per share)

$4.77

Vested at the end of the period (in dollars per share)

$5.79

Weighted-Average Remaining Contractual Life

Outstanding at the end of the period

'8 years 1 month 6 days

'8 years 2 months 12 days

Vested and expected to vest at the end of the period

'7 years 10 months 24 days

Vested at the end of the period

'7 years 2 months 12 days

Aggregate Intrinsic Value

Outstanding at the end of the period (in dollars)

594,000

396,000

Vested and expected to vest at the end of the period (in dollars)

466,000

Vested at the end of the period (in dollars)

186,000

Equity incentive plan, additional disclosures

Aggregate intrinsic value of options exercised (in dollars)

$7,000

$100,000

$86,000

$100,000

Equity_Incentive_Plans_Details1

Equity Incentive Plans (Details 2) (USD $)	9 Months Ended		0 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Mar. 04, 2013	Feb. 27, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
	Sep. 30, 2013	Dec. 31, 2012	Underwriting Agreement	Underwriting Agreement	Exercise prices $0.91 - $2.17	Exercise prices $2.18 - $4.33	Exercise prices $4.34 - $6.50	Exercise prices $6.51 - $8.67	Exercise prices $8.68 - $21.68
Additional information regarding the entity's stock options outstanding and vested	'	'	'	'	'	'	'	'	'
Exercise price, low end of the range (in dollars per share)	'	'	'	'	$0.91	$2.18	$4.34	$6.51	$8.68
Exercise price, high end of the range (in dollars per share)	'	'	'	'	$2.17	$4.33	$6.50	$8.67	$21.68
Options Outstanding	'	'	'	'	'	'	'	'	'
Shares	2,974,360	'	'	'	331,738	1,267,103	938,486	282,314	154,719
Weighted-Average Remaining Contractual Life	'8 years 1 month 6 days	'	'	'	'8 years 6 months	'8 years 9 months 18 days	'7 years 9 months 18 days	'6 years 2 months 12 days	'6 years 7 months 6 days
Weighted-Average Exercise Price per Share (in dollars per share)	$4.65	'	'	'	$1.67	$3.40	$4.90	$7.88	$13.77
Options Vested and Exercisable	'	'	'	'	'	'	'	'	'
Shares	1,289,885	'	'	'	106,921	350,980	427,904	268,005	136,075
Weighted-Average Exercise Price per Share (in dollars per share)	$5.79	'	'	'	$1.67	$3.40	$4.90	$7.88	$13.66
Compensation cost, additional disclosure	'	'	'	'	'	'	'	'	'
Total compensation cost related to unvested stock-based awards not yet recognized	$8,800,000	'	'	'	'	'	'	'	'
Weighted-average remaining period to amortize compensation cost not yet recognized	'2 years 6 months	'	'	'	'	'	'	'	'
Sale of common stock to underwriter (in shares)	'	'	3,450,000	'	'	'	'	'	'
Number of common stock shares the Company agreed to sell due to underwriting agreement	'	'	'	3,000,000	'	'	'	'	'
Common stock, par value (in dollars per share)	$0.00	$0.00	'	$0.00	'	'	'	'	'
Common stock price per share (in dollars per share)	'	'	'	$4	'	'	'	'	'
Period granted to underwriter for purchase of additional shares	'	'	'	'30 days	'	'	'	'	'
Common stock issued to underwriters under an over-allotment option (in shares)	'	'	'	450,000	'	'	'	'	'
Proceeds from offering before underwriting discounts, commissions and offering expenses	$12,574,000	'	$12,600,000	'	'	'	'	'	'

Equity_Incentive_Plans_Details2

Equity Incentive Plans (Details 3) (USD $)

3 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Jul. 26, 2012

Aug. 23, 2012

Jul. 26, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Eligible options

New Options

Restricted stock units

Restricted stock awards

Restricted stock

2013 Plan

2010 Plan

Minimum

Maximum

Restricted stock units

Share-based compensation

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

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

960,443

Options issued in exchange (in shares)

386,175

692,682

Percentage of options vesting after the first year of service

25.00%

Remaining vesting period of options

'36 months

Exercise price (in dollars per share)

$3.40

Incremental charge due to modification

$500,000

Amortization period of incremental charge

'4 years

Vesting period

'3 months

'4 years

Stock-based compensation expense recognized

1,300,000

1,800,000

4,600,000

5,800,000

1,000,000

3,000,000

2,600,000

Number of Stock Awards Outstanding

Balance at the beginning of the period (in shares)

809,542

2,400

Granted (in shares)

1,651,427

315,000

1,336,427

Released (in shares)

-485,607

-1,200

-486,807

Forfeited (in shares)

-269,878

-1,200

Balance at the end of the period (in shares)

1,705,484

Weighted Average Grant Date Fair Value

Outstanding at the beginning of the period (in dollars per share)

$7.32

$13.73

Granted (in dollars per share)

$3.93

Released (in dollars per share)

$5.94

$13.73

Forfeited (in dollars per share)

$5.90

$13.73

Outstanding at the end of the period (in dollars per share)

$4.65

Aggregate Intrinsic Value

Outstanding at the end of the period (in dollars)

5,577,000

2,145,000

6,000

Intrinsic value of awards vested

1,900,000

Shares withheld to satisfy employees' minimum tax obligation on the vested awards

43,140

Amount withheld to satisfy employees' minimum tax obligation on the vested awards

$174,000

$114,000

$200,000

Equity_Incentive_Plans_Details3

Equity Incentive Plans (Details 4) (USD $)	3 Months Ended		9 Months Ended
Equity Incentive Plans (Details 4) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Summary of Assumptions	'	'	'	'	'
Stock-based compensation expense	$1,300,000	$1,800,000	$4,600,000	$5,800,000	'
Shares of common stock available for future issuance	2,126,337	'	2,126,337	'	1,752,468
Employee Stock Purchase Plan	'	'	'	'	'
Equity incentive plans	'	'	'	'	'
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 (as a percent)	'	'	1.00%	'	'
Summary of Assumptions	'	'	'	'	'
Dividend rate (as a percent)	0.00%	0.00%	0.00%	0.00%	'
Risk-free interest rate (as a percent)	0.10%	0.20%	0.10%	0.10%	'
Expected life	'9 months 18 days	'6 months	'9 months 18 days	'6 months	'
Expected volatility (as a percent)	96.00%	79.90%	96.00%	70.60%	'
Stock-based compensation expense	$100,000	$67,000	$400,000	$300,000	'
Issuance of common stock (in shares)	'	'	189,994	'	'
Shares of common stock available for future issuance	253,055	'	253,055	'	'

Information_about_Geographic_A2

Information about Geographic Areas (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	Sep. 30, 2013	Sep. 30, 2012	activity	Sep. 30, 2012	Dec. 31, 2012
Information about Geographic Areas	'	'	'	'	'
Number of business activities	'	'	1	'	'
Information about geographic areas	'	'	'	'	'
Revenue	$24,400	$25,386	$75,586	$69,296	'
Long-lived assets	2,209	'	2,209	'	2,473
United States	'	'	'	'	'
Information about geographic areas	'	'	'	'	'
Revenue	11,373	13,756	40,547	35,354	'
Long-lived assets	1,352	'	1,352	'	1,328
United Kingdom	'	'	'	'	'
Information about geographic areas	'	'	'	'	'
Revenue	5,767	5,406	14,023	14,906	'
Rest of EMEA	'	'	'	'	'
Information about geographic areas	'	'	'	'	'
Revenue	2,896	2,939	8,435	8,085	'
Asia Pacific	'	'	'	'	'
Information about geographic areas	'	'	'	'	'
Revenue	2,094	2,055	7,193	6,677	'
Rest of Americas	'	'	'	'	'
Information about geographic areas	'	'	'	'	'
Revenue	2,270	1,230	5,388	4,274	'
India	'	'	'	'	'
Information about geographic areas	'	'	'	'	'
Long-lived assets	850	'	850	'	1,131
Japan	'	'	'	'	'
Information about geographic areas	'	'	'	'	'
Long-lived assets	$7	'	$7	'	$14

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Taxes	'	'	'	'
Provision for income taxes	$97	$119	$324	$410

RelatedParty_Transactions_Deta

Related-Party Transactions (Details) (USD $)	12 Months Ended		3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended
	Dec. 31, 2011	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2012
		Private company co-founded by Dr. Vaduvur Bharghavan	Reseller	Reseller	Reseller	Reseller	Reseller	Distributor	Distributor
			Japan	Japan	Japan	Japan	Japan
Related-party transactions	'	'	'	'	'	'	'	'	'
Amount invested in a company co-founded by Dr. Vaduvur Bharghavan	$1,300,000	$1,300,000	'	'	'	'	'	'	'
Revenue from related party	'	'	100,000	200,000	500,000	600,000	'	400,000	1,300,000
Accounts receivable from related party	'	'	$63,000	'	$63,000	'	$16,000	'	'