Cyan (CYNI) 10-K 27 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Mar. 23, 2015	Jun. 30, 2014
Document Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	CYNI
Entity Registrant Name	CYAN INC
Entity Central Index Key	1391636
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		48,281,375
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$86.60

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$47,740	$32,509
Restricted cash	4,165	0
Marketable securities	0	31,639
Accounts receivable (net of allowance for doubtful accounts of $227 and $147 at December 31, 2014 and 2013)	23,511	14,558
Short-term lease receivable	0	201
Inventories	12,362	20,746
Deferred costs	1,317	8,286
Prepaid expenses and other	3,079	1,378
Total current assets	92,174	109,317
Long-term restricted cash	7,868	0
Long-term lease receivable	0	403
Property and equipment, net	11,896	11,155
Other assets	3,737	645
Total assets	115,675	121,520
Current liabilities:
Accounts payable	12,058	8,474
Accrued liabilities	6,775	3,786
Accrued compensation	4,146	4,895
Term loan, current portion	0	1,604
Deferred revenue	5,646	17,516
Deferred rent	181	115
Other liabilities	0	734
Total current liabilities	28,806	37,124
Convertible debt, net of discount	18,498	0
Derivative and warrant liabilities	36,280	0
Term loan, non-current portion	0	3,396
Deferred revenue	1,845	1,577
Deferred rent	302	486
Total liabilities	85,731	42,583
Commitments and contingencies (Note 5)
Stockholders’ equity (deficit):
Preferred stock, $0.0001 par value, 20,000,000 shares authorized and no shares issued or outstanding as of December 31, 2014 and 2013.	0	0
Common stock, $0.0001 par value: 1,000,000,000 authorized as of December 31, 2014 and 2013; 47,305,129 and 46,536,436 shares issued and outstanding as of December 31, 2014 and December 31, 2013.	5	5
Additional paid in-capital	216,607	206,300
Accumulated other comprehensive loss	-162	-86
Accumulated deficit	-186,506	-127,282
Total stockholders’ equity (deficit)	29,944	78,937
Total liabilities and stockholders’ equity	$115,675	$121,520

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$227	$147
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	47,305,129	46,536,436
Common stock, shares outstanding	47,305,129	46,536,436

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenue	$100,483	$116,582	$95,872
Cost of revenue	58,651	68,376	57,315
Gross profit	41,832	48,206	38,557
Operating expenses:
Research and development	36,115	32,609	18,447
Sales and marketing	43,565	40,102	25,243
General and administrative	15,241	13,082	6,055
Restructuring charges	627	0	0
Total operating expenses	95,548	85,793	49,745
Loss from operations	-53,716	-37,587	-11,188
Change in fair value of derivative and warrant liabilities	-4,710	0	0
Interest expense	-486	-367	-33
Other income (expense), net	-32	-2,635	-5,340
Total other expense, net	-5,228	-3,002	-5,373
Loss before provision for income taxes	-58,944	-40,589	-16,561
Provision for income taxes	280	143	40
Net loss	($59,224)	($40,732)	($16,601)
Basic and diluted net loss per share (in dollars per share)	($1.26)	($1.32)	($6.60)
Weighted-average number of shares used in computing basic and diluted net loss per share (in shares)	46,956	30,836	2,515

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Loss (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net loss	($59,224)	($40,732)	($16,601)
Other comprehensive income (loss):
Foreign currency translation adjustments	-60	-83	8
Unrealized gains (losses) on available for sale securities and reclassification to realized gains and losses, net of tax	-16	16	0
Total other comprehensive income (loss)	-76	-67	8
Comprehensive loss	($59,300)	($40,799)	($16,593)

Consolidated_Statements_of_Red

Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) Statement (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Redeemable Convertible Preferred Stock [Member]
In Thousands, except Share data, unless otherwise specified
Beginning Balance at Dec. 31, 2011	($68,675)	$0	$1,301	($27)	($69,949)
Beginning Balance at Dec. 31, 2011						98,133
Beginning Balance, Shares at Dec. 31, 2011						33,897,005
Beginning Balance, Shares at Dec. 31, 2011		2,440,771
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock plans, shares		134,449
Issuance of common stock under employee stock plans	116		116
Unrealized gains on available for sale securities	0
Stock-based compensation	2,097		2,097
Foreign currency translation adjustment	8			8
Net loss	-16,601				-16,601
Ending Balance at Dec. 31, 2012	-83,055	0	3,514	-19	-86,550
Ending Balance, Shares at Dec. 31, 2012		2,575,220
Beginning Balance at Dec. 31, 2012						98,133
Beginning Balance, Shares at Dec. 31, 2012						33,897,005
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock plans, shares		289,479
Issuance of common stock under employee stock plans	412	0	412
Issuance of common stock upon initial public offering (IPO), net of issuance costs of $3,854, shares		8,899,022
Issuance of common stock upon initial public offering (IPO), net of issuance costs of $3,854	87,185	2	87,183
Conversion of convertible preferred stock to common stock upon IPO, shares		33,897,005				-33,897,005
Conversion of convertible preferred stock to common stock upon IPO	98,133	3	98,130			-98,133
Reclassification of preferred stock warrant liability upon IPO, shares		469,717
Reclassification of preferred stock warrant liability upon IPO	8,856		8,856
Exercise of preferred stock warrants upon IPO, shares		405,993
Exercise of preferred stock warrants upon IPO	975		975
Unrealized gains on available for sale securities	16			16
Stock-based compensation	7,230		7,230
Foreign currency translation adjustment	-83			-83
Net loss	-40,732				-40,732
Ending Balance at Dec. 31, 2013	78,937	5	206,300	-86	-127,282
Ending Balance at Dec. 31, 2013						0
Ending Balance, Shares at Dec. 31, 2013		46,536,436
Ending Balance, Shares at Dec. 31, 2013						0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock plans, shares	348,264	1,005,777
Issuance of common stock under employee stock plans	495		495
Unrealized gains on available for sale securities	-16			-16
Stock-based compensation	10,553		10,553
Payroll taxes withheld related to vested restricted stock units, shares		-237,084
Payroll taxes withheld related to vested restricted stock units	-741		-741
Foreign currency translation adjustment	-60			-60
Net loss	-59,224				-59,224
Ending Balance at Dec. 31, 2014	29,944	5	216,607	-162	-186,506
Ending Balance at Dec. 31, 2014						$0
Ending Balance, Shares at Dec. 31, 2014		47,305,129
Ending Balance, Shares at Dec. 31, 2014						0

Consolidated_Statements_of_Red1

Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Common stock issuance costs	$3,854

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net loss	($59,224)	($40,732)	($16,601)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	3,589	2,721	1,801
Provision for doubtful accounts	80	643	0
Stock-based compensation	10,553	7,249	2,097
Change in fair value of derivative and warrant liabilities	4,710	2,602	5,354
Non-cash interest expense	313	0	0
Loss on extinguishment of debt	10	0	0
Loss on disposal of assets	195	0	0
Changes in operating assets and liabilities:
Accounts receivable	-9,033	3,999	-12,674
Lease receivable	604	-604	0
Inventories	8,233	-7,733	-8,162
Deferred costs	6,969	-58	-5,924
Prepaid expenses and other assets	-1,355	-448	-586
Accounts payable	3,109	-2,846	6,483
Accrued liabilities	1,605	1,478	1,133
Accrued compensation	-739	1,152	2,337
Deferred revenue	-11,602	1,676	12,198
Deferred rent	-118	344	81
Net cash used in operating activities	-42,101	-30,557	-12,463
Investing activities
Purchases of property and equipment	-4,345	-6,111	-5,698
Purchase of available for sale securities	-14,259	-31,639	0
Purchase of other investment	0	-500	0
Maturity of available for sale securities	27,772	0	0
Sale of available for sale securities	18,126	0	0
Change in restricted cash	-12,033	0	0
Net cash used in investing activities	15,261	-38,250	-5,698
Financing activities
Proceeds from initial public offering (IPO), net of issuance costs	0	88,369	0
Proceeds from convertible debt offering	50,000	0	0
Issuance costs related to convertible debt offering	-2,558	0	0
Repayments of borrowings under term loan	-5,000	0	0
Proceeds from stock-based compensation programs	495	412	116
Repayments of revolving loan and borrowings under notes payable	0	-7,563	-45
Borrowings under revolving loan and term loan facilities	0	0	12,563
Taxed paid related to net-share settlements of restricted stock units	-741	0	0
Payments on capital leases	-40	-58	0
Net cash provided by financing activities	42,156	81,160	12,634
Effect of exchange rate changes on cash and cash equivalents	-85	-65	8
Net increase (decrease) in cash and cash equivalents	15,231	12,288	-5,519
Cash and cash equivalents at beginning of period	32,509	20,221	25,740
Cash and cash equivalents at end of period	47,740	32,509	20,221
Supplemental disclosures of cash flow information
Cash paid for interest	288	361	43
Cash paid for taxes	243	32	27
Non-cash investing and financing activities
Property and equipment included in accounts payable	27	1,183	832
Issuance of common stock warrants with convertible debt financing	4,605	0	0
Debt issuance related costs in accounts payable and other accrued liabilities	925	0	0
Deferred offering costs in accounts payable and accrued liabilities	0	0	1,537
Conversion of convertible preferred stock into common stock upon IPO	0	98,133	0
Reclassification of preferred stock warrant liability upon IPO	$0	$8,856	$0

Organization_and_Significant_A

Organization and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Organization and Significant Accounting Policies	Organization and Significant Accounting Policies
	Description of the Business — Cyan, Inc. (Cyan or the Company) was incorporated on October 25, 2006, in the state of Delaware and its principal executive offices are located in Petaluma, California. The Company has pioneered innovative, carrier-grade networking solutions that transform disparate and inefficient legacy networks into open, high-performance networks. The Company’s solutions include high-capacity, multi-layer switching and transport platforms as well as a carrier-grade software-defined networking platform and applications. The Company’s solutions enable its customers to virtualize their networks, accelerate service delivery and increase scalability and performance while reducing costs. The Company designed its solutions to provide a variety of existing and emerging premium applications including business Ethernet, wireless backhaul, broadband backhaul and cloud connectivity. The Company’s customers range from service providers to high-performance data center and large, private network operators.
	Initial Public Offering — In May 2013, the Company closed its initial public offering (IPO) whereby 8,899,022 shares of common stock were sold to the public, including 899,022 shares of common stock issued pursuant to the partial exercise of an overallotment option granted to the underwriters. The aggregate net proceeds received by the Company from the offering were $87.2 million, net of underwriting discounts and commissions and issuance expenses. Upon the closing of the IPO, all previously outstanding shares of the Company’s outstanding convertible preferred stock automatically converted into 33,897,005 shares of common stock. In addition, warrants to purchase shares of convertible preferred stock were exercised resulting in the issuance of 792,361 shares of common stock and the remaining outstanding warrants to purchase convertible preferred stock were converted into warrants to purchase 115,001 shares of common stock. In November 2013, the remaining warrants to purchase common stock were net exercised resulting in the issuance of 83,349 shares of common stock.
	Principles of Consolidation — The Company's consolidated financial statements include its accounts and the accounts of its wholly-owned subsidiaries. Intercompany transactions and balances have been eliminated.
	Fiscal Periods — The Company operates on fiscal periods ending on the last day of the respective calendar quarter.
	Use of Estimates — The preparation of financial statements in accordance with Generally Accepted Accounting Principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses for the reporting period. For the Company, these estimates include, but are not limited to, allowances for doubtful accounts, inventory valuation, excess and obsolete inventory, allowances for obligations to its contract manufacturer, useful lives assigned to long-lived assets, sales returns reserve, the fair value of stock awards, the fair value of a contingent conversion feature, a make-whole conversion adjustment, and certain interest features related to the Company's 8.0% convertible senior notes issued in December 2014 and due December 15, 2019 (the “Notes”) which are accounted for as a single compound embedded derivative (the “Compound Embedded Derivative”) and warrants associated the Notes. Notes, warranty costs, contingencies, accounting for income taxes, including the determination of the timing of the establishment or release of the Company's valuation allowance related to the Company's deferred tax asset balances and reserves for uncertain tax positions, and prior to the Company's initial public offering, the fair value of common and redeemable convertible preferred stock and related warrants. Actual results could differ from those estimates, and such differences could be material to the Company’s consolidated financial position and results of operations.
	Cash and Cash Equivalents — The Company considers all highly liquid investments with an original or remaining maturity of three months or less, when purchased, to be cash equivalents. At December 31, 2014 and 2013 cash equivalents consist primarily of money market funds, the cost of which approximates fair value.
	Credit Risk and Concentrations — Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, trade receivables and lease receivables.
	Cash and cash equivalents consist of cash and money market funds that are invested through financial institutions in the United States. Such deposits may, at times, exceed federally insured limits. The Company has not experienced any losses in such accounts.
	Available for sale marketable securities include U.S. treasury securities, U.S. government-sponsored agency securities, commercial paper, corporate bonds and municipal bonds. Investment policies have been implemented that limit the purchase of marketable securities to investment grade securities. Marketable securities that are downgraded after purchase are evaluated on a case by case basis by management to determine if they should be held or sold. Generally, the Company's marketable securities have maturity dates up to two years from the date of purchase and active markets for these securities exist.
	Management believes that the financial institutions that hold the Company’s cash, cash equivalents and marketable securities are financially sound and, accordingly, minimal credit risk exists with respect to these cash, cash equivalents and marketable securities.
	Concentrations of credit risk with respect to trade receivables exist to the full extent of amounts presented in the financial statements. The Company performs ongoing credit evaluations of its customers and generally does not require collateral from its customers to secure trade receivables. Trade receivables are derived from sales to customers located in the United States as well as those in international locations. The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The Company records a specific allowance based on an analysis of individual past-due balances, including evaluations of its customers’ financial condition. Additionally, based on its historical write-offs and collections experience, the Company records an additional allowance based on a percentage of outstanding receivables. These evaluations require significant judgment and are based on a variety of factors, including, but not limited to, current economic trends, payment history and financial review of the customer. Actual collection losses may differ from management’s estimates, and such differences could be material to the Company’s consolidated financial position and results of operations. The Company had $0.2 million and $0.1 million allowance for doubtful accounts recorded as of December 31, 2014 and 2013, respectively.
	The Company provides leasing arrangements for certain qualified end-user customers. The Company classifies these arrangements as lease receivables, which represent sales-type leases resulting from the sale of the Company’s products. Lease receivables consist of arrangements with the Company's customers, which generally have three year terms. As of December 31, 2014 and 2013 the Company had $0 million and $0.6 million of lease receivables and no allowance for credit losses as of that date.
	The Company depends on its contract manufacturer for its finished goods inventory. The Company operates under a manufacturing services agreement with its contract manufacturer pursuant to which the Company is to provide a rolling quarterly forecast indicating the Company’s monthly production requirements. While the Company seeks to maintain sufficient inventory on hand, the Company’s business and results of operations could be adversely affected by a stoppage or delay in receiving such products, the receipt of defective parts, an increase in the price of such products, or the Company’s inability to obtain lower prices from its contract manufacturer and suppliers in response to competitive pressures.
	Inventories — Inventories consisting of finished goods purchased from the contract manufacturer are stated at the lower of cost or market value, with cost being determined using standard cost, which approximates actual cost, on a first-in, first-out basis. The Company regularly monitors inventory quantities on hand and on order and records write-downs for excess and obsolete inventories as a component of cost of revenue. Write downs are recorded if the Company determines that demand for its products, potential obsolescence of technology, product life cycles, or pricing trends or forecasts indicate that the carrying value of inventory exceeds its estimated selling price. These factors are affected by market and economic conditions, technology changes, and new product introductions and require estimates that may include elements that are uncertain. Actual demand may differ from forecasted demand and may have a material effect on future gross margins. If inventory is written down, a new cost basis is established that cannot be increased in future periods.
	Foreign Currency Translation — The Company’s revenue contracts are denominated in U.S. dollars, but certain operating expenses are incurred in various foreign currencies. Generally, the functional currency of the Company’s foreign operations is the local country’s currency. For those entities where the functional currency is the local country's currency, the expenses of operations outside the U.S. are translated into U.S. dollars using average exchange rates for the period reported, while assets and liabilities of operations outside the U.S. are translated into U.S. dollars using the end-of-period exchange rates.
	Foreign currency translation adjustments not affecting net loss are included in stockholders’ deficit as a component of accumulated other comprehensive loss in the accompanying consolidated balance sheets.
	The revaluation effect of foreign currency fluctuations is recorded as foreign currency gain (loss) and included in other income (expense) in the accompanying consolidated statements of operations.
	Property and Equipment, Net — Property and equipment are stated at cost less accumulated depreciation and are depreciated on a straight-line basis over the estimated useful lives of the assets, generally three to five years. Leasehold improvements are amortized over the shorter of their estimated useful life, generally five to ten years, or the related remaining lease term. The costs of repairs and maintenance are expensed when incurred, while expenditures for refurbishments and improvements that significantly add to the productive capacity or extend the useful life of an asset are capitalized. When assets are retired or sold, the asset cost and related accumulated depreciation are eliminated, with any remaining gain or loss reflected in the accompanying consolidated statements of operations.
	Impairment of Long-Lived Assets — The Company periodically evaluates long-lived assets for impairment whenever events or changes in circumstances indicate that a potential impairment may have occurred. If such events or changes in circumstances arise, the Company compares the carrying amount of the long-lived assets to the estimated future undiscounted cash flows expected to be generated by the long-lived assets. If the estimated aggregate, undiscounted cash flows are less than the carrying amount of the long-lived assets, an impairment charge, calculated as the amount by which the carrying amount of the asset exceeds the fair value of the assets, is recorded. Through December 31, 2014 no impairment losses have been identified.
	Revenue Recognition — Revenue is recognized when all of the following criteria are met:
	•	Persuasive evidence of an arrangement exists. Customer purchase orders, along with master purchase contracts, where applicable, are generally used to determine the existence of an arrangement.
	•	Delivery has occurred. Shipping documents and customer acceptance, when applicable, are used to verify delivery.
	•	The price is fixed or determinable. The Company assesses whether the price is fixed or determinable based on the payment terms associated with the transaction and whether the sales price is subject to refund or adjustment.
	•	Collectability is reasonably assured. The Company assesses collectability based primarily on the creditworthiness of the customer as determined by credit checks and analysis, as well as the customer’s payment history.
	The Company derives revenue primarily from the sales of its hardware and software products as well as professional services. Shipping charges billed to customers are included in revenue.
	From time to time, the Company offers customers sales incentives, including discounts. Revenue is recorded net of these amounts. Customer payment terms generally range from 30 to 90 days. The Company generally does not offer extended payment terms.
	In 2013, a portion of the Company’s sales were made through multi-year lease agreements.  These lease agreements included a bargain purchase option and meet the criteria for treatment as sales-type leases. Under sales-type leases, the Company recognized revenue for its hardware products, net of post-installation product maintenance and technical support, at the net present value of the lease payment stream. The Company sought to optimize its cash flows by selling a majority of its lease receivables to third party financing organizations on a non-recourse basis.  Aside from its standard product warranty which is provided in the normal course of business, the Company has no obligation to the third party financing organizations once the lease receivables were sold.
	In general, the Company’s products and services qualify as separate units of accounting. Products are typically considered delivered upon shipment. In certain cases, the Company’s products are sold along with services, which include installation, training, remote network monitoring services, post-sales software support, software-as-a-service (SaaS) based subscriptions, and/or extended warranty services. Post-sales software support includes rights, on a when-and-if-available basis, to receive unspecified software product upgrades to embedded software or the Company’s management software; maintenance releases; and patches released during the term of the support contract. This type of transaction is considered a multiple-element arrangement. When accounting for multiple-element arrangements, GAAP requires the Company to allocate revenue to individual elements using vendor-specific objective evidence (VSOE), third-party evidence (TPE), or its best estimated selling price (BESP) of deliverables if VSOE or TPE cannot be determined.
	Multiple-element arrangements can include any combination of products and services. When allocating consideration, the Company will first do so on the basis of the deliverables’ relative selling prices, without regard to any contingent consideration, and then subsequently determine whether the revenue that may be recognized is limited based on the amount of non-contingent revenue. To the extent that the stated contractual prices agree to the Company’s estimated selling price on a standalone basis, the allocation of the consideration is based on stated contractual prices. However, if the stated contractual price for any deliverable is outside a narrow range of the estimated selling price on a standalone basis, the allocation is adjusted using the “relative-selling-price method.” Generally, the individual products and services meet the criteria for separate units of accounting and the Company recognizes revenue for each element upon delivery of the element.
	The Company has not yet established VSOE for all deliverables in its arrangements with multiple elements. When VSOE cannot be established, the Company attempts to establish the selling price of each element based upon TPE by evaluating the pricing of similar and interchangeable competitor products or services in standalone arrangements. However, as the Company’s products contain a significant element of proprietary technology and offer substantially different features and functionality from competitors, the Company has not been able to obtain comparable standalone pricing information with respect to competitors’ products. Therefore, the Company has historically not been able to obtain reliable evidence of TPE.
	When the Company is unable to establish a selling price using VSOE or TPE, the Company uses BESP. The objective of BESP is to determine the price at which the Company would transact a sale if the element was sold on a standalone basis.
	The Company determines BESP for an element by considering multiple factors, including, but not limited to, geographies, market conditions, competitive landscape, internal costs, gross margin objectives, characteristics of targeted customers, and pricing practices. The determination of BESP is made through consultation with and formal approval by the Company’s management, taking into consideration the go-to-market strategy. The Company regularly reviews VSOE, TPE, and BESP and has a process for the establishment and updating of these estimates.
	Post-sales software support revenue and extended warranty services revenue are deferred and recognized ratably over the period during which the services are to be performed. Installation and training service revenues are recognized upon delivery or completion of performance. These service arrangements are typically short-term in nature and are largely completed shortly after delivery of the product.
	The Company also delivers software-defined networking solutions to customers most frequently on a term license basis, with terms typically ranging from 12 to 36 months. While term-based licenses make up the majority of related revenues, the Company occasionally licenses software to customers on a perpetual basis with on-going support and maintenance services. Revenue from software that functions together with the tangible hardware elements to deliver the tangible products’ essential functionality is generally recognized upon shipment assuming all other revenue recognition criteria are met.  Revenue from application software and related software elements which are not considered essential to the functionality of hardware is accounted for in accordance with software industry guidance, and therefore is recognized ratably over the longest service period for post-contract customer support (PCS) and professional services as the Company has not established VSOE for software or the related software elements.
	In instances where substantive acceptance provisions are specified in the customer agreement, revenue is deferred until all acceptance criteria have been met. The Company’s arrangements generally do not include any provisions for cancellation, termination or refunds that would materially impact revenue recognition.
	The Company enters into arrangements with certain of its customers who receive government supported loans and grants from the U.S. Department of Agriculture’s Rural Utility Service (RUS) to finance capital spending. Under the terms of an RUS equipment contract that includes installation services, the customer does not take possession and control and the title does not pass until formal acceptance is obtained from the customer. Under this type of arrangement, the Company does not recognize revenue until it has received formal acceptance from the customer and all other revenue recognition criteria have been met.
	When the Company’s products have been delivered but the product revenue associated with the arrangement has been deferred as a result of not meeting the revenue recognition criteria, the related product costs are also deferred and included in deferred costs in the accompanying consolidated balance sheets.
	Advertising Costs — Advertising costs, which are expensed and included in sales and marketing expense when incurred, were $0.3 million, $0.3 million and $0.2 million for the years ended December 31, 2014, 2013 and 2012.
	Cost of Revenue — Cost of revenue primarily consists of product manufacturing costs incurred with the Company’s contract manufacturer. Cost of revenue also includes third-party manufacturing and supply chain logistics costs, provisions for excess and obsolete inventory, warranty, hosting costs, certain allocated costs for facilities, depreciation and other expenses associated with logistics and quality control. Additionally, it includes salaries, benefits and stock-based compensation for personnel directly involved with manufacturing installation, maintenance and support services and the provision of the Company’s service offerings.
	Research and Development — Research and development costs primarily include salaries and other personnel-related expenses, contractor fees, facility costs, supplies, and depreciation of equipment associated with the design and development of new products prior to the establishment of their technological feasibility. Such costs are charged to research and development expense as incurred.
	Development costs related to software incorporated in the Company’s products incurred subsequent to the establishment of technological feasibility and prior to the product being released would be capitalized and amortized over the estimated useful lives of the related products. Technological feasibility is established upon completion of a working model. Through December 31, 2014 all software development costs have been charged to research and development expense in the accompanying consolidated statements of operations.
	Warranties — The Company generally offers limited warranties for its hardware products for periods of one to ten years. The Company recognizes estimated costs related to warranty activities as a component of cost of revenue upon product shipment. The estimates are based upon historical product failure rates and historical costs incurred in correcting product failures. The recorded amount is adjusted from time to time for specifically identified warranty exposures. Actual warranty expenses are charged against the Company’s estimated warranty liability when incurred. Factors that affect the Company’s liability include the number of installed units, historical and anticipated rates of warranty claims and the cost per claim.
	Additionally, the Company offers separately priced extended warranty contracts for coverage beyond the standard warranty period. The Company expenses all warranty costs as incurred related to such extended warranty contracts.
	Income Taxes — The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the temporary differences between the financial reporting and tax basis of assets and liabilities using enacted tax rates in effect for the years in which the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax laws is recognized in the consolidated statement of operations in the period that includes the enactment date. Valuation allowances are established when necessary to reduce deferred income tax assets to the amounts more-likely-than-not expected to be realized.
	As part of the process of preparing the consolidated financial statements, the Company is required to estimate income tax expense and uncertain tax positions in each of the tax jurisdictions in which the Company operates. This process involves estimating current income tax expense together with assessing temporary differences in the treatment of items for tax purposes versus financial accounting purposes that may create net deferred tax assets and liabilities. The Company relies on estimates and assumptions in preparing its income tax provision.
	The Company is subject to periodic audits by the Internal Revenue Service and other taxing authorities. The Company recognizes the tax benefit of an uncertain tax position only if it is more-likely-than-not that the position is sustainable upon examination by the taxing authority based on the technical merits. The tax benefit recognized is measured as the largest amount of benefit which is greater than 50 percent likely to be realized upon settlement with the taxing authority. The Company recognizes interest accrued and penalties related to unrecognized tax benefits in the income tax provision.
	Stock–Based Compensation — The Company measures and recognizes stock-based compensation expense in the financial statements for all share-based payment awards made to employees and directors based on the estimated fair values on the date of grant using the Black-Scholes option-pricing model.
	Prior to the Company's initial public offering in May 2013, the fair values of the common stock underlying share-based payment awards was determined by the board of directors, with input from management and a third-party valuation specialist. In the absence of a publicly traded market for the Company's common stock, the board of directors determined the fair value of the common stock in accordance with the guidelines outlined in the American Institute of Certified Public Accountants Practice Guide, Valuation of Privately-Held-Company Equity Securities Issued as Compensation.
	The Company’s determination of the fair value of a share based payment award on the date of grant using the Black-Scholes option pricing model is affected by assumptions regarding a number of subjective variables. These variables include the Company’s expected stock price volatility over the expected term of the awards, risk-free interest rates and expected dividends. The expected term represents the period that the award is expected to be outstanding. The expected term of stock options was estimated based on the simplified method that takes into consideration the vesting and contractual terms. Volatility is estimated based on the average of the historical volatilities of the common stock of the Company’s peer group in the industry in which the Company does business, with characteristics similar to those of the Company. The Company uses the U.S. Treasury yield for its risk-free interest rate and a dividend yield of zero, as it does not issue dividends.
	In addition to assumptions used in the Black-Scholes option pricing model, the Company must also estimate a forfeiture rate to calculate the stock-based compensation of its awards. The estimated forfeiture rate is based on an analysis of actual forfeitures and will continue to be evaluated based on actual forfeiture experience, analysis of employee turnover behavior and other factors. Further, to the extent the Company’s actual forfeiture rate is different from this estimate, which could be material, stock-based compensation is adjusted accordingly.
	New Accounting Pronouncements — In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (ASU 2014-09), which provides guidance for revenue recognition. ASU 2014-09 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance.  Additionally, it supersedes some cost guidance included in Subtopic 605-35, Revenue Recognition-Construction-Type and Production-Type Contracts, and creates new Subtopic 340-40, Other Assets and Deferred Costs-Contracts with Customers. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the previous guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 requires retrospective application by either a “full retrospective” adoption in which the standard is applied to all of the periods presented or a “modified retrospective” adoption for fiscal years beginning after December 15, 2016. The standard will be effective for the Company in the first quarter of fiscal 2017. Early adoption is not permitted. The Company has not selected a transition method and is currently assessing the potential impact on its financial statements from adopting this new guidance.
	In August 2014 the FASB issued ASU 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. The ASU is intended to define management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern and to provide related footnote disclosures. For all entities, the ASU is effective for annual periods ending after December 15, 2016 and interim periods within annual periods beginning after December 15, 2016. The standard will be effective for the Company in the first quarter of fiscal 2017. Early adoption is permitted. The Company is currently assessing the potential impact on its financial statements from adopting this new guidance.

Fair_Value_Disclosure

Fair Value Disclosure	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Disclosure	Fair Value Disclosure
	Assets and liabilities recorded at fair value in the consolidated financial statements are categorized based upon the level of judgment associated with the inputs used to measure their fair value. The Company categorizes its financial instruments into a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements).
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Hierarchical levels that are directly related to the amount of subjectivity associated with the inputs to the valuation of these assets or liabilities are as follows:
	Level 1:    Inputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date.
	Level 2:    Inputs (other than quoted market prices included in Level 1) are either directly or indirectly observable for the asset or liability through correlation with market data at the measurement date and for the duration of the instrument’s anticipated life.
	Level 3:    Inputs reflect management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration is given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model.
	Cash Equivalents
	Where quoted prices are available in an active market, cash equivalents are classified within Level 1 of the valuation hierarchy. Cash equivalents classified in Level 1 at December 31, 2014 and December 31, 2013 include money market funds. The valuation of these instruments is determined using a market approach and is based upon unadjusted quoted prices for identical assets in active markets.
	Marketable Securities
	Available for sale marketable securities are carried at fair value, with any unrealized gains and losses, net of tax, reported as a separate component of stockholders’ equity. Marketable securities consist of U.S treasury securities, U.S. government-sponsored agency securities, municipal bonds, corporate bonds and commercial paper. The Company held no marketable securities as of December 31, 2014.
	The fair value of the Company's marketable securities is determined as the exit price in the principal market in which it would transact. Level 1 instruments are valued based on quoted market prices in active markets and include U.S treasury securities. Level 2 instruments are valued based on quoted prices in markets that are not active, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency and include U.S. government-sponsored agency securities, municipal bonds, corporate bonds and commercial paper. Level 3 instruments are valued based on unobservable inputs that are supported by little or no market activity and reflect the Company's own assumptions in measuring fair value. As of December 31, 2013, the Company had no marketable securities classified within Level 3 of the fair value hierarchy.
	Preferred Stock Warrant Liability
	Prior to the Company's IPO in May 2013, the Company estimated the fair value of preferred stock warrants at the respective balance sheet dates using the Black-Scholes option-pricing model based on the fair value of the underlying redeemable convertible preferred stock at the valuation measurement date, the remaining contractual term of the warrant, risk-free rates, expected dividends and the expected volatility of the price of the underlying redeemable convertible preferred stock. Because this model includes significant unobservable inputs, preferred stock warrant liabilities were classified within Level 3 of the valuation hierarchy.
	The company performed the final re-measurement of the convertible preferred stock warrant liability in connection with the completion of its IPO in May 2013 at which time the warrants remaining outstanding became exercisable for common stock, and reclassified the warrant liability from other current liabilities to additional paid-in capital.
	Derivative Liabilities
	In December 2014, the Company issued $50 million aggregate principal amount of 8.0% convertible senior notes due December 15, 2019 (the “Notes”). The Notes include a conversion option, including contingent conversion, a make-whole conversion adjustment, and certain interest features which are accounted for as a single compound embedded derivative (the “Compound Embedded Derivative”). The fair value of the Compound Embedded Derivative was determined based on a binomial lattice model. The liability is classified within Level 3 as the volatility assumption was based on the weighting of observable and implied volatilities and the estimated weighting and implied volatility are unobservable inputs used to value the Compound Embedded Derivative.
	In December 2014, the Company issued detachable warrants, in conjunction with issuing the Notes. The fair value of each warrant is estimated by utilizing a Black-Scholes option-pricing model. The liability is classified within Level 3 as the volatility assumption was based on the weighting of observable and implied volatilities and the estimated weighting and implied volatility are unobservable inputs used to value the Compound Embedded Derivative.
	Fair Value Hierarchy
	The following tables set forth by level, within the fair value hierarchy, the Company’s assets and liabilities at fair value as of December 31, 2014 (in thousands):
			Level 1			Level 2			Level 3			Total
	Assets:
	Cash Equivalents:
	Money Market Funds		$	4,110		$	—		$	—		$	4,110
	Liabilities:
	Derivative Liabilities		$	—		$	—		$	36,280		$	36,280
	The following tables set forth by level, within the fair value hierarchy, the Company’s assets and liabilities at fair value as of December 31, 2013 (in thousands):
			Level 1			Level 2			Level 3			Total
	Assets:
	Cash Equivalents:
	Money Market Funds		$	13,452		$	—		$	—		$	13,452
	Marketable Securities:
	Commercial paper		$	—		$	19,687		$	—		$	19,687
	Corporate bonds		—			4,857			—			4,857
	Municipal bonds		—			1,026			—			1,026
	U.S. government-sponsored agency securities		—			2,031			—			2,031
	U.S. treasury securities		4,038			—			—			4,038
	Total marketable securities		$	4,038		$	27,601		$	—		$	31,639
	There were no transfers of assets or liabilities measured at fair value between levels within the fair value hierarchy during the years ended December 31, 2014 and 2013.
	The following table summarizes the changes in liabilities classified in Level 3 for the year ended December 31, 2014. Gains and losses reported in this table include changes in fair value that are attributable to both observable and unobservable inputs (in thousands):
			Year Ended December 31, 2014
	Beginning balance		$	—
	Issuance of derivative liabilities and warrants with Notes		$	31,570
	Change in fair value of derivative liabilities		4,710
	Ending balance		$	36,280
	The following table shows the Company’s available-for-sale securities amortized cost, gross unrealized gains, gross unrealized losses and fair value as of December 31, 2013 (in thousands):
		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
	Marketable securities:
	Commercial paper	$	19,683		$	5		$	1		$	19,687
	Corporate bonds	4,854			4			1			4,857
	Municipal bonds	1,027			—			1			1,026
	U.S. government-sponsored agency securities	2,029			2			—			2,031
	U.S. treasury securities	4,030			8			—			4,038
	Total marketable securities	$	31,623		$	19		$	3		$	31,639
	The Company held no marketable securities at December 31, 2014. The unrealized gains and losses at December 31, 2013 reflected in the table above were reversed, or reclassified as realized, as the securities matured or were sold.
	When held, the Company regularly reviewed its marketable securities portfolio to identify and evaluate instruments for indications of possible impairment.
	As of December 31, 2013 no marketable securities were in a continuous unrealized loss position for more than twelve months. The gross unrealized loss was primarily due to changes in interest rates. The gross unrealized loss on all available-for-sale marketable securities as of December 31, 2013 were considered temporary in nature. Factors considered in determining whether a loss is temporary include, but are not limited to, the length of time and extent to which fair value has been less than the cost basis and the financial condition and near-term prospects of the investee.
	The Company evaluated its marketable securities portfolio as of December 31, 2013 and has determined that none of its marketable securities were impaired.

Balance_Sheet_Components

Balance Sheet Components	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance Sheet Components	Balance Sheet Components
	Cash and Cash Equivalents
	Cash and cash equivalents consisted of the following (in thousands):
		December 31, 2014			December 31, 2013
	Cash	$	43,630		$	19,057
	Money market funds	4,110			13,452
	Total cash and cash equivalents	$	47,740		$	32,509
	Restricted cash related to the Notes is held at a depository institution.
	Allowance for Doubtful Accounts
	The table below presents the changes in the allowance for doubtful accounts for the years ended December 31, 2014 and 2013 (in thousands):
		Year Ended December 31, 2014			Year Ended December 31, 2013
	Opening balance	$	147		$	—
	Provision for doubtful accounts	80			643
	Write offs	—			(496		)
	Closing balance	$	227		$	147
	Prior to the year ended December 31, 2013, the Company had recorded no provision for doubtful accounts or accounts receivable write offs.
	Lease Receivables
	The Company held no lease receivables at December 31, 2014. At December 31, 2013, lease receivables consisted of the following (in thousands):
		December 31, 2013
	Net minimum lease payments to be received	$	639
	Less unearned interest income portion	35
	Total lease receivable	604
	Less short-term lease receivable	201
	Long-term lease receivable	$	403
	In the three months ended December 31, 2013 the Company sold $9.2 million of its lease receivables to a third party financing organization at par value for total cash proceeds of $9.2 million. The Company sold the remaining balance of $0.6 million in the three months ended March 31, 2014. Pursuant to these sales, the Company retained no substantial risk of default by the lessee nor provided any guarantee of residual value of the underlying leased equipment, except for standard product warranty that is provided in the normal course of business. Consequently, the Company met the requirements for de-recognition of the related lease receivables.
	Inventory
	Inventories consisted of finished goods purchased from the contract manufacturer and are stated at the lower of cost (on a first-in, first-out basis) or market value. Inventory consisted of the following (in thousands):
		December 31, 2014			December 31, 2013
	Raw materials	$	1,202		$	748
	Finished goods	11,160			19,998
	Total Inventory	$	12,362		$	20,746
	During the year ended December 31, 2014 and 2013, the Company recorded a write-down for excess and obsolete inventory of $1.2 million and $1.0 million, respectively. These write-downs were included as a component of cost of revenue in the year in which it was recorded.
	Property and Equipment, Net
	Property and equipment, net consisted of the following (in thousands):
		December 31, 2014			December 31, 2013
	Lab equipment and tooling	$	18,303		$	14,743
	Software	628			667
	Leasehold improvements	1,569			1,595
	Furniture and fixtures	987			974
	Computer equipment	720			979
	Property and equipment, gross	22,207			18,958
	Less accumulated depreciation and amortization	(10,311		)	(7,803		)
	Property and equipment, net	$	11,896		$	11,155
	For the years ended December 31, 2014, 2013 and 2012, depreciation and amortization expense on property and equipment was $3.6 million, $2.7 million and $1.8 million.
	Accrued Liabilities
	Accrued liabilities consisted of the following (in thousands):
		December 31, 2014			December 31, 2013
	Inventory-in-transit	$	1,516		$	344
	Warranty reserve (1)	2,564			1,374
	Sales returns reserve (2)	370			198
	Professional fees	1,137			862
	Sales and use taxes	201			497
	Other	987			511
	Total accrued liabilities	$	6,775		$	3,786
	-1	The table below presents the changes in warranty reserve for the years ended December 31, 2014 ,2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Beginning balance	$	1,374		$	1,266		$	783
	Charge to cost of sales	1,388			1,553			1,106
	Incremental warranty recoverable from component manufacturer	1,567			—			—
	Costs incurred	(1,765		)	(1,445		)	(623		)
	Closing balance	$	2,564		$	1,374		$	1,266
	During the three months ended June 30, 2014, the Company and a component manufacturer reached an agreement whereby the component manufacturer agreed to reimburse the Company for certain costs, up to an agreed maximum, associated with replacing defective products sold to customers. As of December 31, 2014, $1.2 million remains recoverable from this component manufacturer. This amount is classified within prepaid expenses and other on the consolidated balance sheets.
	(2) The table below presents the changes in the sales returns reserve for the years ended December 31, 2014 and 2013 (in thousands):
	Year Ended December 31, 2014			Year Ended December 31, 2013
Opening balance	$	198		$	—
Provision for sales returns	386			910
Sales returns	(214		)	(712		)
Closing balance	$	370		$	198
Prior to the year ended December 31, 2013 the Company had recorded no sales returns reserve or sales returns.

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	Debt
	Loan and Security Agreement
	On December 21, 2012, the Company entered into a Loan and Security Agreement with Silicon Valley Bank (“SVB”). The agreement provided for a revolving loan facility of up to $10.0 million and a term loan facility of up to $5.0 million, for a total loan facility of up to $15.0 million. As of December 31, 2013, the Company had outstanding principal of $5.0 million as term loans and zero as revolving loans. As of December 31, 2013 the Company was in compliance with all covenants. The Company repaid the outstanding balance under the SVB credit facility and terminated the agreement in December 2014.
	Convertible Debt
	On December 12, 2014, the Company issued $50.0 million aggregate principal amount of 8.0% Convertible Senior Secured Notes due December 15, 2019 (the “Notes”) and related warrants to purchase up to an aggregate 11.25 million shares of the Company’s common stock, par value $0.0001 per share (the “Warrants”), in a private placement to qualified institutional buyers and accredited investors.
	Aggregate offering expenses in connection with the transaction, including the placement agent's fee of $2.3 million, were $3.5 million, resulting in net proceeds of $46.5 million. $12.0 million of the offering proceeds were deposited into an escrow account which the Company will use to pay the first six scheduled semi-annual interest payments on the Notes.
	The Company issued the Notes under an Indenture, dated December 12, 2014 (the “Indenture”), between the Company and U.S. Bank National Association, as Trustee and Collateral Agent. The Notes provide 8.0% interest per annum, payable semi-annually in arrears on June 15 and December 15 of each year, with interest beginning to accrue from December 12, 2014. The Notes will mature on December 15, 2019, unless earlier converted, redeemed or repurchased by the Company. The Notes are convertible into the Company’s common stock as described below.
	The Notes are secured by a first-priority lien, subject only to certain permitted liens and certain excluded assets, on substantially all of the Company’s and the subsidiary guarantors’ assets, whether now owned or hereafter acquired, including license agreements, general intangibles, accounts instruments, investment property, intellectual property and any proceeds of the foregoing. The guarantees of each subsidiary guarantor will be a senior secured obligation of such subsidiary guarantor and will have the same ranking with respect to indebtedness of such subsidiary guarantor as the Notes will have with respect to the Company’s indebtedness. At December 31, 2014, there are no subsidiary guarantors.
	The Notes are the Company’s senior secured obligation and will rank senior in right of payment to any of the Company’s indebtedness that is expressly subordinated in right of payment to the Notes; will rank effectively senior to any of the Company’s unsecured indebtedness to the extent of the value of the collateral securing the Notes; will rank equal in right of payment to the Company’s existing and future liabilities that is not so subordinated to the Notes; and will rank structurally junior to all indebtedness and other liabilities (including trade payable) of the Company’s existing and future subsidiaries that do not guarantee the Notes.
	The initial conversion rate for the Notes is 409.3998 shares of common stock per $1,000 principal amount of Notes, which is equivalent to an initial conversion price of approximately $2.44 per share. Except in the case of certain specified corporate events, the Notes will not be convertible prior to January 15, 2016. Thereafter, until the close of business on June 15, 2019, the Notes will only be convertible under certain circumstances. On and after June 15, 2019, the Notes may be converted at any time prior to maturity. Unless and until the Company obtains stockholder approval to issue additional shares, it will be required (i) to settle Notes purchased by existing stockholders and officers and any other Notes settled on the same date solely in cash and (ii) to settle all conversions of Notes (other than those purchased by existing stockholders and officers and only if settled on a date different from the date of settlement of the Notes purchased by existing stockholders and officers) by paying cash in an amount of at least the principal amount of Notes converted and any combination of cash or shares of common stock for the conversion value in excess of the principal amount, if any, subject to a share cap. Upon conversion, in certain circumstances, the Company will also make an interest make-whole payment.
	The Company may not redeem the Notes prior to December 20, 2017. On or after December 20, 2017, the Company may redeem the Notes at a redemption price equal to the principal amount of the Notes to be redeemed, plus accrued and unpaid interest, to, but excluding, the redemption date if the last reported sale price of its common stock for at least 20 trading days (whether or not consecutive) during the 30 consecutive trading day period ending within three trading days prior to the date notice of redemption is delivered is at least 140% of the conversion price of the Notes on each applicable trading day.
	In the event that the Company undergoes a fundamental change, the holders may require the Company to purchase for cash all or any portion of the Notes at a purchase price equal to the principal amount of the Notes to be purchased plus accrued and unpaid interest to, but excluding, the fundamental change purchase date. The Company will also increase the conversion rate, in certain circumstances, if a holder elects to convert Notes in connection with a fundamental change or a redemption of the Notes.
	In addition to the Notes, the Company also issued warrants to purchase 225 shares of the Company's common stock for each $1,000 principal amount of Notes issued, resulting in issuing warrants exercisable for an aggregate of 11.25 million shares of common stock. The exercise price per share of common stock purchasable upon exercise of the Warrants is $3.62 per share of common stock. The exercise price is subject to appropriate anti-dilution adjustment in the event of certain stock dividends and distributions, stock splits, stock combinations, reclassifications or similar events affecting the Company’s common stock and also upon any distributions of assets, including cash, stock or other property to the Company’s stockholders.
	The warrants are exercisable at any time on and after January 15, 2016 and expire on December 15, 2017. The warrants will be exercisable, at the option of each holder, in whole or in part by delivering to the Company a duly executed exercise notice and either by payment in full in immediately available funds for the number of shares of common stock purchased upon such exercise or through a cashless exercise, in which case the holder would receive upon such exercise the net number of shares of common stock determined according to the formula set forth in the warrant. No fractional shares of common stock will be issued in connection with the exercise of a warrant. In lieu of fractional shares, the Company will pay the holder an amount in cash equal to the fractional amount multiplied by the exercise price. Notwithstanding the foregoing, unless and until the Company has obtained the requisite stockholder approvals, the Company will be required to cash settle any exercises of the warrants according to the net value formula set forth in the warrants.
	The conversion option and certain interest rate features, including contingent conversion and the make-whole interest, are embedded derivatives. These features are accounted for as a single compound embedded derivative (the “Compound Embedded Derivative”). The conversion option and warrants are not subject to the equity scope exception since explicit net cash settlement is required prior to receipt of approval of the shareholders to settle in shares. As such the Compound Embedded Derivative and warrants are accounted for at fair value with changes in fair value recorded in the Company’s consolidated statement of operations.
	The fair value of the Compound Embedded Derivative was computed using a Binomial Lattice approach of a similar note with and without the Compound Embedded Derivative. The Warrants were valued using the Black-Scholes Option-pricing model.
	The initial discounted value of the Notes of $18.4 million (after allocation of proceeds to the warrants and bifurcation of the Compound Embedded Derivative) is accreted to its $50.0 million principal amount over the term of the Notes under the effective interest rate method. The aggregate amount of issuance costs is deferred and amortized to interest expense under the effective interest method over the term of the Notes. The effective interest rate is 48.9%.
	The table below summarizes the issuance of the Notes as reflected in the balance sheet at December 31, 2014 (in thousands):
		December 31, 2014
	Gross Proceeds	$	50,000
	Initial value of Compound Embedded Derivative reported as debt discount	(26,965		)
	Initial value of common stock warrants reported as debt discount	(4,605		)
	Amortization of debt discount	68
	Ending balance	$	18,498
	At December 31, 2014, the balance of unamortized debt issuance costs was $3.4 million.

Convertible_Debt

Convertible Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Convertible Debt	Debt
	Loan and Security Agreement
	On December 21, 2012, the Company entered into a Loan and Security Agreement with Silicon Valley Bank (“SVB”). The agreement provided for a revolving loan facility of up to $10.0 million and a term loan facility of up to $5.0 million, for a total loan facility of up to $15.0 million. As of December 31, 2013, the Company had outstanding principal of $5.0 million as term loans and zero as revolving loans. As of December 31, 2013 the Company was in compliance with all covenants. The Company repaid the outstanding balance under the SVB credit facility and terminated the agreement in December 2014.
	Convertible Debt
	On December 12, 2014, the Company issued $50.0 million aggregate principal amount of 8.0% Convertible Senior Secured Notes due December 15, 2019 (the “Notes”) and related warrants to purchase up to an aggregate 11.25 million shares of the Company’s common stock, par value $0.0001 per share (the “Warrants”), in a private placement to qualified institutional buyers and accredited investors.
	Aggregate offering expenses in connection with the transaction, including the placement agent's fee of $2.3 million, were $3.5 million, resulting in net proceeds of $46.5 million. $12.0 million of the offering proceeds were deposited into an escrow account which the Company will use to pay the first six scheduled semi-annual interest payments on the Notes.
	The Company issued the Notes under an Indenture, dated December 12, 2014 (the “Indenture”), between the Company and U.S. Bank National Association, as Trustee and Collateral Agent. The Notes provide 8.0% interest per annum, payable semi-annually in arrears on June 15 and December 15 of each year, with interest beginning to accrue from December 12, 2014. The Notes will mature on December 15, 2019, unless earlier converted, redeemed or repurchased by the Company. The Notes are convertible into the Company’s common stock as described below.
	The Notes are secured by a first-priority lien, subject only to certain permitted liens and certain excluded assets, on substantially all of the Company’s and the subsidiary guarantors’ assets, whether now owned or hereafter acquired, including license agreements, general intangibles, accounts instruments, investment property, intellectual property and any proceeds of the foregoing. The guarantees of each subsidiary guarantor will be a senior secured obligation of such subsidiary guarantor and will have the same ranking with respect to indebtedness of such subsidiary guarantor as the Notes will have with respect to the Company’s indebtedness. At December 31, 2014, there are no subsidiary guarantors.
	The Notes are the Company’s senior secured obligation and will rank senior in right of payment to any of the Company’s indebtedness that is expressly subordinated in right of payment to the Notes; will rank effectively senior to any of the Company’s unsecured indebtedness to the extent of the value of the collateral securing the Notes; will rank equal in right of payment to the Company’s existing and future liabilities that is not so subordinated to the Notes; and will rank structurally junior to all indebtedness and other liabilities (including trade payable) of the Company’s existing and future subsidiaries that do not guarantee the Notes.
	The initial conversion rate for the Notes is 409.3998 shares of common stock per $1,000 principal amount of Notes, which is equivalent to an initial conversion price of approximately $2.44 per share. Except in the case of certain specified corporate events, the Notes will not be convertible prior to January 15, 2016. Thereafter, until the close of business on June 15, 2019, the Notes will only be convertible under certain circumstances. On and after June 15, 2019, the Notes may be converted at any time prior to maturity. Unless and until the Company obtains stockholder approval to issue additional shares, it will be required (i) to settle Notes purchased by existing stockholders and officers and any other Notes settled on the same date solely in cash and (ii) to settle all conversions of Notes (other than those purchased by existing stockholders and officers and only if settled on a date different from the date of settlement of the Notes purchased by existing stockholders and officers) by paying cash in an amount of at least the principal amount of Notes converted and any combination of cash or shares of common stock for the conversion value in excess of the principal amount, if any, subject to a share cap. Upon conversion, in certain circumstances, the Company will also make an interest make-whole payment.
	The Company may not redeem the Notes prior to December 20, 2017. On or after December 20, 2017, the Company may redeem the Notes at a redemption price equal to the principal amount of the Notes to be redeemed, plus accrued and unpaid interest, to, but excluding, the redemption date if the last reported sale price of its common stock for at least 20 trading days (whether or not consecutive) during the 30 consecutive trading day period ending within three trading days prior to the date notice of redemption is delivered is at least 140% of the conversion price of the Notes on each applicable trading day.
	In the event that the Company undergoes a fundamental change, the holders may require the Company to purchase for cash all or any portion of the Notes at a purchase price equal to the principal amount of the Notes to be purchased plus accrued and unpaid interest to, but excluding, the fundamental change purchase date. The Company will also increase the conversion rate, in certain circumstances, if a holder elects to convert Notes in connection with a fundamental change or a redemption of the Notes.
	In addition to the Notes, the Company also issued warrants to purchase 225 shares of the Company's common stock for each $1,000 principal amount of Notes issued, resulting in issuing warrants exercisable for an aggregate of 11.25 million shares of common stock. The exercise price per share of common stock purchasable upon exercise of the Warrants is $3.62 per share of common stock. The exercise price is subject to appropriate anti-dilution adjustment in the event of certain stock dividends and distributions, stock splits, stock combinations, reclassifications or similar events affecting the Company’s common stock and also upon any distributions of assets, including cash, stock or other property to the Company’s stockholders.
	The warrants are exercisable at any time on and after January 15, 2016 and expire on December 15, 2017. The warrants will be exercisable, at the option of each holder, in whole or in part by delivering to the Company a duly executed exercise notice and either by payment in full in immediately available funds for the number of shares of common stock purchased upon such exercise or through a cashless exercise, in which case the holder would receive upon such exercise the net number of shares of common stock determined according to the formula set forth in the warrant. No fractional shares of common stock will be issued in connection with the exercise of a warrant. In lieu of fractional shares, the Company will pay the holder an amount in cash equal to the fractional amount multiplied by the exercise price. Notwithstanding the foregoing, unless and until the Company has obtained the requisite stockholder approvals, the Company will be required to cash settle any exercises of the warrants according to the net value formula set forth in the warrants.
	The conversion option and certain interest rate features, including contingent conversion and the make-whole interest, are embedded derivatives. These features are accounted for as a single compound embedded derivative (the “Compound Embedded Derivative”). The conversion option and warrants are not subject to the equity scope exception since explicit net cash settlement is required prior to receipt of approval of the shareholders to settle in shares. As such the Compound Embedded Derivative and warrants are accounted for at fair value with changes in fair value recorded in the Company’s consolidated statement of operations.
	The fair value of the Compound Embedded Derivative was computed using a Binomial Lattice approach of a similar note with and without the Compound Embedded Derivative. The Warrants were valued using the Black-Scholes Option-pricing model.
	The initial discounted value of the Notes of $18.4 million (after allocation of proceeds to the warrants and bifurcation of the Compound Embedded Derivative) is accreted to its $50.0 million principal amount over the term of the Notes under the effective interest rate method. The aggregate amount of issuance costs is deferred and amortized to interest expense under the effective interest method over the term of the Notes. The effective interest rate is 48.9%.
	The table below summarizes the issuance of the Notes as reflected in the balance sheet at December 31, 2014 (in thousands):
		December 31, 2014
	Gross Proceeds	$	50,000
	Initial value of Compound Embedded Derivative reported as debt discount	(26,965		)
	Initial value of common stock warrants reported as debt discount	(4,605		)
	Amortization of debt discount	68
	Ending balance	$	18,498
	At December 31, 2014, the balance of unamortized debt issuance costs was $3.4 million.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Facility Lease
	In April 2007 the Company entered into a lease for the Company's headquarters facility in Petaluma, California. As amended to date, the 2007 lease provides for the lease of 18,895 square feet and expires in 2025. As of December 31, 2014, the Company's total remaining obligations under the 2007 lease were $6.0 million. In July 2013, the Company entered into a lease for an additional 20,005 square feet of space in Petaluma, California, increasing by a further 18,773 square feet in 2016. The 2013 lease expires concurrently with the 2007 lease in 2025. Total remaining obligations under the 2013 lease are $11.5 million with payments starting in 2015. The Company has an option to extend the term of both leases for an additional five-year period.
	In relation to these lease agreements, an executive officer, who is also a member of the Company’s board of directors, owns approximately 40% of the limited liability company from which the Company is leasing the office premises. As of December 31, 2014 and December 31, 2013 no amounts were included in accounts payable or accrued expenses under these agreements.
	As of December 31, 2014 and December 31, 2013 total deferred rent was $0.5 million and $0.6 million. For the years ended December 31, 2014, 2013 and 2012 rent expense was $1.1 million, $0.8 million and $0.5 million.
	Future minimum annual obligations under non-cancellable lease agreements as of December 31, 2014 are as follows (in thousands):
	Year ending December 31:
	2015	1,294
	2016	1,449
	2017	1,768
	2018	1,804
	2019	1,799
	Thereafter	9,950
	Total	$	18,064
	Contingencies
	From time to time, The Company may be involved in various legal proceedings arising from the normal course of business. On April 1, 2014 a purported stockholder class action lawsuit was filed in the Superior Court of California, County of San Francisco, against the Company, the members of the Company's Board of Directors, the Company's former Chief Financial Officer and the underwriters of the Company's IPO.  On April 30, 2014 a substantially similar lawsuit was filed in the same court against the same defendants. The two cases have been consolidated under the caption Beaver County Employees Retirement Fund, et al. v. Cyan, Inc. et al., Case No. CGC-14-539008. The consolidated complaint alleges violations of federal securities laws on behalf of a purported class consisting of purchasers of the Company's common stock pursuant or traceable to the registration statement and prospectus for the Company's IPO, and seek unspecified compensatory damages and other relief.  In July 2014, the defendants filed a demurrer to (motion to dismiss) the consolidated complaint. On October 22, 2014, the court overruled the demurrer and allowed the case to proceed. The Company intends to defend the litigation vigorously. Based on information currently available, the Company has determined that the amount of any possible loss or range of possible loss is not reasonably estimable.
	Guarantees
	The Company from time to time enters into certain types of contracts that contingently require it to indemnify various parties against claims from third parties. These contracts primarily relate to (i) certain real estate leases, under which the Company may be required to indemnify property owners for environmental and other liabilities, and other claims arising from the Company’s use of the applicable premises; (ii) certain agreements with the Company’s officers, directors, and employees, under which the Company may be required to indemnify such persons for liabilities arising out of their relationship with the Company; (iii) contracts under which the Company may be required to indemnify customers against third-party claims that a Company product infringes a patent, copyright, or other intellectual property right; and (iv) procurement or license agreements, under which the Company may be required to indemnify licensors or vendors for certain claims that may be brought against them arising from the Company’s acts or omissions with respect to the supplied products or technology.
	Generally, a maximum obligation under these contracts is not explicitly stated. Because the obligated amounts associated with these types of agreements are not explicitly stated, the overall maximum amount of the obligation cannot be reasonably estimated. Historically, the Company has not been required to make payments under these obligations, and no liabilities have been recorded for these obligations in the Company’s consolidated balance sheet.
	Contract Manufacturer
	As of December 31, 2014 and December 31, 2013 the Company has commitments to its contract manufacturer of $9.7 million and $7.9 million. These commitments include raw materials, work in progress and scheduled future orders. Should the Company be required to pay under this guarantee, the Company has the right to obtain and liquidate the related inventory to recover amounts paid under the guarantee.

Redeemable_Convertible_Preferr

Redeemable Convertible Preferred Stock and Warrants	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Redeemable Convertible Preferred Stock and Warrants	Redeemable Convertible Preferred Stock and Warrants
	On various dates throughout 2007, 2008 and 2009, the Company issued warrants to purchase 12,806 shares of the Company’s Series A Preferred Stock and 102,195 shares of the Company’s Series B Preferred Stock at exercise prices of $1.30 and $2.45 per share. These warrants were exercisable on various dates throughout 2013, 2014 and 2015.
	Upon closing of the IPO, warrants to purchase 894,596 shares of convertible preferred stock were net exercised resulting in the issuance of 792,361 shares of common stock. Warrants to purchase 115,001 shares of convertible preferred stock were converted into warrants to purchase common stock at the original exercise price per share. In November 2013, the remaining warrants to purchase common stock were net exercised resulting in the issuance of 83,349 shares of common stock.
	Prior to the closing of the IPO, the Company re-measured the fair value of the preferred stock warrants at each balance sheet date. The fair value of the outstanding warrant was classified within current liabilities on the consolidated balance sheets, and any changes in fair value were recognized as a component of other income (expenses), net in the consolidated statements of operations.
	Upon the closing of the IPO, the preferred stock warrant liability was reclassified from current liabilities to stockholders’ equity and the Company will no longer record any mark-to-market changes in the fair value of the remaining outstanding common stock warrants. The Company performed the final re-measurement of the warrant in connection with the completion of the IPO in May 2013.
	The fair value of the outstanding preferred stock warrants was determined using the Black-Scholes-Merton option-pricing model. The fair value of the preferred stock warrant was estimated using the following assumptions for the periods presented below:
		Year Ended December 31,
		2013			2012
	Expected term (years)	0.48-3.24			0.80-3.49
	Volatility	55	%		55	%
	Risk-free interest rate	0.22-0.68%			0.25-0.36%
	Dividend yield	—			—
	The change in the fair value of the convertible preferred stock warrant liability during the periods presented is summarized below (in thousands):
		Year Ended December 31,
		2013				2012
	Opening balance	$	6,254			$	900
	Increase (decrease) in fair value	2,602				5,354
	Reclassification of warrant liability to additional paid-in capital	(8,856		)		—
	Closing balance	$	—			$	6,254
	Upon the closing of the IPO in May 2013, all outstanding shares of convertible preferred stock were converted into shares of common stock on a one-for-one basis.

Common_Stock

Common Stock	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Common Stock	Common Stock
	Initial Public Offering
	In May 2013, the Company completed its initial public offering of its common stock to the public whereby 8,899,022 shares of common stock were sold by the Company, including 899,022 shares of common stock issued upon the partial exercise of the overallotment option granted to the underwriters. The public offering price of the shares sold in the offering was $11.00 per share.
	The total gross proceeds from the offering to the Company were $97.9 million. After deducting underwriters’ discounts and commissions and offering expenses, the aggregate net proceeds received by the Company totaled $87.2 million. Immediately prior to the closing of the IPO, all shares of the Company’s outstanding redeemable convertible preferred stock automatically converted into 33,897,005 shares of common stock. On December 31, 2014 the Company had 47,305,129 shares of common stock issued and outstanding.
	Change in Authorized Stock
	In March 2013, the Company’s board of directors and stockholders approved an amended and restated certificate of incorporation that became effective in connection with the completion of the IPO. Upon completion of the IPO, the authorized common stock was 1,000,000,000 shares and authorized undesignated preferred stock was 20,000,000 shares.
	Stock-Based Compensation Awards
	In 2006, the board of directors adopted the 2006 Stock Incentive Plan (2006 Plan). The 2006 Plan provided for the granting of incentive stock options and nonstatutory options to employees, officers, directors, and consultants of the Company. Generally, stock options granted under the 2006 Plan had terms of 10 years and vested over a period of four years. The 2006 Plan was terminated upon the adoption of the 2013 Equity Incentive Plan (2013 Plan) at the time of the Company’s IPO. Options outstanding under the 2006 Plan were unaffected by the termination of the plan. The shares of common stock reserved for issuance under the 2006 Stock Plan at the termination of the 2006 Plan/adoption of the 2013 were added to the initial reserve under the 2013 Plan. In addition, any shares of common stock reserved for issuance upon exercise of any options issued under the 2006 Plan that are forfeited, canceled or terminated (other than by exercise) subsequent to adoption of the 2013 Plan, up to an aggregate of 11,400,000 shares, roll over from the 2006 Plan to the 2013 Plan.
	In March 2013, the Company’s board of directors and stockholders approved the 2013 Plan. The 2013 Plan provides for the issuance of stock options, restricted stock and restricted stock units (RSUs) and other compensatory equity award types. Through December 31, 2014, the Company had issued only stock options and RSUs (performance and time-based) under the 2013 Plan.
	A total of 3,600,000 shares of common stock were initially reserved for future issuance under the 2013 Plan. An additional 204,730 shares rolled over from the 2006 Plan to the 2013 Plan at the time of the initial public offering. Through December 31, 2014, an aggregate of 1,378,050 shares were added to the 2013 Plan as a result of the termination of options originally issued under the 2006 Plan. The 2013 Plan also provides for an automatic annual increase in shares reserved for issuance under the 2013 Plan on January 1 of each year in amount equal to the least of (i) 5,000,000 shares, (ii) four and one half percent (4.5%) of the outstanding shares on the last day of the immediately preceding fiscal year or (iii) such number of shares determined by the Board. On January 1, 2014, an additional 2,094,194 shares of common stock were reserved for future issuance under the 2013 Plan in accordance with the annual increase provision of the plan.
	The following table shows the outstanding award balances and shares available for future issuance under the equity incentive plans at December 31, 2014:
		At December 31, 2014
	Options outstanding under 2006 Plan	10,234,590
	Options outstanding under 2013 Plan	1,097,039
	RSUs outstanding under 2013 Plan	3,067,728
	Shares reserved for future issuance under 2013 Plan	1,877,240
	Restricted Stock Units
	In the years ended December 31, 2014 and 2013 the Compensation Committee of the Board of Directors awarded RSUs to employees. The RSUs generally vest quarterly over a four year period. The stock-based compensation expense related to RSUs is recognized on a ratable basis over the requisite service period of the grant. The fair value of RSUs is determined using the fair value of the Company’s common stock on the date of grant.
	In the year ended December 31, 2014 the Compensation Committee of the Board of Directors awarded RSUs and performance based RSUs (PBRSUs) to members of the executive team. The performance based awards were subject to performance-based requirements as well as additional time based vesting requirements. The fair value of RSUs and PBRSUs is determined using the fair value of the Company’s common stock on the date of grant. The performance requirements related to the 2014 PBRSU grants were not met and the PBRSUs lapsed with no shares being issuable on December 31, 2014.
	The following table shows a summary of RSU activity, which includes PBRSUs, for the year ended December 31, 2014:
		Shares			Weighted-Average Grant Date Fair Value
	Unvested as of December 31, 2013	42,500			$	11
	Granted	4,784,704			$	3.48
	Vested	(662,195	)		$	4.49
	Forfeited	(1,097,281	)		$	3.88
	Unvested as of December 31, 2014	3,067,728
	The aggregate intrinsic value of RSUs outstanding was $9.9 million as of December 31, 2014. The Company recorded stock-based compensation expense related to RSUs of $3.3 million for the year ended December 31, 2014. As of December 31, 2014, there was $9.0 million of total unrecognized compensation expense related to RSUs, which is expected to be recognized over a weighted-average period of 1.1 years.
	Employee Stock Options
	In the years ended December 31, 2014 and 2013, the Compensation Committee of the Board of Directors awarded options to employees. Stock options generally have a term of 10 years and vest over a period of four years.
	A summary of the activity and changes during the year ended December 31, 2014 and a summary of information related to options exercisable and vested and expected to vest are presented below:
		Number of			Weighted				Weighted		Aggregate
		Shares			Average				Average		Intrinsic
		Outstanding			Exercise				Remaining		Value (in
					Price				Contractual		thousands)
									Life (Years)
	Balance at December 31, 2013	12,957,942			$	4.33			7.78		$	27,629
	Options granted	1,050,105			$	3.87
	Options exercised	(348,264	)		$	1.38
	Options forfeited	(1,518,154	)		$	7.38
	Balance at December 31, 2014	12,141,629			$	3.99			6.57		$	3,499
	Options vested and expected to vest - December 31, 2014	12,055,621			$	3.99			6.56		$	3,497
	Options exercisable - December 31, 2014	7,816,201			$	3.27			5.81		$	3,483
	The fair value of options granted to employees during the years ended December 31, 2014, 2013 and 2012 was $1.7 million, $18.4 million and $13.3 million. The Company determined the fair value of each option grant on the date of grant using the Black-Scholes option-pricing model using the following factors:
			Year Ended December 31,
			2014			2013			2012
	Expected term (years)		6.08			6.08			6.08
	Volatility		41-44%			46-55%			55	%
	Risk-free interest rate		1.49-1.95%			0.70-1.75%			0.62-1.02%
	Dividend yield		—			—			—
	The weighted-average fair value per share of options granted was $1.60, $4.99 and $2.15 for the years ended December 31, 2014, 2013 and 2012.  The intrinsic value of employee options exercised for the years ended December 31, 2014, 2013 and 2012 was $0.7 million, $1.5 million and $0.3 million.
	The following table summarizes the allocation of stock-based compensation in the accompanying consolidated statements of operations (in thousands):
			Year ended December 31,
			2014				2013				2012
	Cost of revenue		$	378			$	160			$	57
	Research and development		3,800				2,348				745
	Sales and marketing		3,701				2,165				656
	General and administrative		2,674				2,576				639
	Total stock-based compensation		$	10,553			$	7,249			$	2,097
	At December 31, 2014, the total unamortized stock-based compensation expense of $12.4 million, is to be recognized over a weighted-average period of 2.2 years.

Net_Loss_Per_Share

Net Loss Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share
	The following table presents the calculation of basic and diluted net loss per share (in thousands, except per share data:
		Year ended December 31,
		2014				2013			2012
	Net loss	$	(59,224	)		$	(40,732	)	$	(16,601	)
	Weighted-average shares used to compute basic and diluted net loss per share	46,956				30,836			2,515
	Basic and diluted net loss per share	$	(1.26	)		$	(1.32	)	$	(6.60	)
	The following securities were excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would have been anti-dilutive for the periods presented (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Redeemable convertible preferred stock	—			—			33,897
	Employee stock options	12,142			12,958			10,213
	Restricted stock units	3,149			43			—
	Convertible preferred stock warrants	—			—			1,010
	Shares underlying the Notes	20,470			—			—
	Common stock warrants	11,250			—			—
	Total	47,011			13,001			45,120

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The following table presents domestic and foreign components of loss before provision for income taxes (in thousands):
		Year Ended December 31,
		2014				2013				2012
	United States	$	(44,385	)		$	(39,068	)		$	(16,725	)
	Foreign	(14,559		)		(1,521		)		164
	Total	$	(58,944	)		$	(40,589	)		$	(16,561	)
	The components of the provision for income taxes are as follows (in thousands):
		Year Ended December 31,
		2014				2013				2012
	Current:
	Federal	$	—			$	—			$	—
	State	18				20				6
	Foreign	251				156				34
	Total current	269				176				40
	Deferred:
	Federal	—				—				—
	State	—				—				—
	Foreign	11				(33		)		—
	Total deferred	11				(33		)		—
	Total provision	$	280			$	143			$	40
	The following table presents a reconciliation of the statutory federal rate and the Company’s effective tax rate for the periods presented:
		Year Ended December 31,
		2014			2013			2012
	Federal income tax at statutory rate	34	%		34	%		34	%
	State income tax, net of federal benefit	2			2			5.2
	Foreign taxes at less than statutory rate	(8.9	)		(1.6	)		0.1
	Intercompany transactions	—			(21.4	)		—
	Nondeductible stock-based compensation	(1.9	)		(2.9	)		(3.0	)
	Nondeductible warrant/derivative fair value adjustment	(2.7	)		(2.2	)		(11.0	)
	Other permanent differences	0.1			(0.4	)		—
	Tax credits generated in current year	1.9			4.1			—
	Valuation allowance change	(24.0	)		(12.0	)		(25.5	)
	Total	0.5	%		(0.4	)%		(0.2	)%
	As a result of the Company’s history of net operating losses, the domestic provision for income taxes relates to accruals for state minimum and capital base income taxes and the foreign provision for income taxes are associated with non-U.S. operations.
	The Company had unrecorded excess stock option tax benefits of $0.4 million and $0.2 million as of December 31, 2014 and 2013. These amounts will be credited to additional paid-in capital when such amounts reduce cash taxes payable.
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The following table presents significant components of the Company’s deferred tax assets (in thousands):
		December 31,
		2014				2013
	Deferred tax assets:
	Deferred revenue	$	1,046			$	2,417
	Accrued expenses and reserves	7,292				4,319
	Loss carryforwards	37,118				27,687
	Tax credit carryforwards	7,767				5,870
	Contribution carryforwards	1				1
	Gross deferred tax assets	53,224				40,294
	Valuation allowance	(53,061		)		(38,937		)
	Net deferred tax assets	163				1,357
	Deferred tax liabilities:
	Basis difference for fixed assets	(145		)		(1,326		)
	Total deferred tax liabilities	(145		)		(1,326		)
	Net deferred tax assets	$	18			$	31
	A valuation allowance is provided when it is more likely than not that the deferred tax assets will not be realized. The Company established a full valuation allowance to offset domestic net deferred tax assets as of December 31, 2014 and 2013 due to the uncertainty of realizing future tax benefits from its net operating loss (“NOL”) carryforwards and other deferred tax assets. The valuation allowance increased by $14.1 million and $4.9 million during the years ended December 31, 2014 and 2013.
	As of December 31, 2014, the Company had $108.1 million of federal and $84.1 million of state net operating loss carryforwards and $5.9 million of federal and $6.6 million of California research tax credit carryforwards available to reduce future taxable income. These net operating loss carryforwards begin to expire in 2026 for U.S. federal income tax and 2015 for state income tax purposes, and the research tax credit carryforwards begin to expire in 2027 for federal purposes, but do not expire for California purposes.
	Under Section 382 of the Tax Reform Act of 1986 and similar state provisions, the amounts of benefits from NOL and tax credit carryforwards may be impaired or limited on an annual basis in the event that the Company has a cumulative ownership change of more than 50%, as defined, over a three-year period. The annual limitation may result in the expiration of the NOL and tax credit carryforwards before utilization. The impact of any limitation that may be imposed due to current or future issuances of equity securities, including issuances with respect to acquisitions, has not been determined.
	The Company has not provided for U.S. taxes on its foreign earnings, which are intended to be indefinitely reinvested outside the U.S.  As of December 31, 2014 the Company had cumulative undistributed earnings of foreign subsidiaries of $0.6 million, which are intended to be reinvested outside the U.S and for which no U.S. income or foreign withholding taxes have been recorded. Determination of the amount of unrecognized deferred tax liability with respect to such earnings is not practicable. The additional taxes on the earnings of foreign subsidiaries, if remitted, would be partially offset by U.S. tax credits for foreign taxes already paid.
	The Company has total unrecognized tax benefits as of December 31, 2014, 2013 and 2012 of $7.4 million, $6.6 million and $1.4 million. No amount of the unrecognized tax benefits, if recognized, would reduce the Company’s annual effective tax rate because the benefits are in the form of deferred tax assets for which a full valuation allowance has been recorded. The Company does not anticipate a significant change to its unrecognized tax benefits over the next twelve months. The following table reflects changes in the unrecognized tax benefits (in thousands):
		December 31,
		2014				2013				2012
	Unrecognized tax benefits as of the beginning of the year	$	6,626			$	1,444			$	1,212
	Increase related to prior year tax provisions	—				202				—
	Decrease related to prior year tax provisions	749				—				—
	Increase related to current year tax provisions	—				4,980				232
	Unrecognized tax benefits as of the end of the year	$	7,375			$	6,626			$	1,444
The Company recognizes interest accrued and penalties related to unrecognized tax benefits in the income tax provision. As of December 31, 2014 and 2013, the Company accrued no interest and penalties in the statement of financial position. Total interest and penalties included in the statements of operations for the years ended December 31, 2014, 2013 and 2012 are each zero. The Company does not expect the amount of existing unrecognized tax benefits to change significantly within the next 12 months.
The Company files income tax returns in the United States, various states and certain foreign jurisdictions. The tax periods 2006 through 2013 remain open in most jurisdictions. The Company is not currently under examination by income tax authorities in federal, state or other foreign jurisdiction.

Employee_Benefit_Plan

Employee Benefit Plan	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plan	Employee Benefit Plan
	The Company provides a defined contribution savings plan under Section 401(k) of the Internal Revenue Code. This plan covers substantially all employees who meet minimum age and service requirements and allows participants to defer a portion of their annual compensation on a pre-tax basis. Company contributions to the plan may be made at the discretion of the board of directors. There were no employer contributions under this plan for the years ended December 31, 2014, 2013 or 2012.

Concentration

Concentration	12 Months Ended
	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Concentration	Concentration
	Customers with a receivables balance of 10% or greater of the total receivables, which includes accounts receivable and lease receivables, and customers with revenue of 10% or greater of the total revenue are as follows:
		Year Ended December 31,						As of December 31,
		2014		2013		2012		2014		2013
		Percentage of Revenue						Percentage of Receivables
	Windstream	29	%	39	%	45	%	59	%	*
	Colt Technology Services Ltd. and its affiliated entity KVH Company, Ltd.	11	%	*		*		*		*
	TDS	*		11	%	*		*		*
	*Represents less than 10%

Segment_Information

Segment Information	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Information	Segment Information
	The Company considers operating segments to be components of the Company in which separate financial information is available and is evaluated regularly by the Company’s chief operating decision maker in deciding how to allocate resources and in assessing performance. The chief operating decision maker ("CODM") for the Company is the Chief Executive Officer.
	The Company operates as a single operating segment. This reflects the fact that the Company's CODM evaluates the Company’s financial information and resources, and assesses the performance of these resources on a consolidated basis. Since the Company operates as one operating segment, all required financial segment is included in the consolidated financial statements.
	Revenue information by location is presented below (in thousands):
		Year Ended December 31,
		2014		2013		2012
	United States	$	78,608	$	106,341	$	91,078
	Other	21,875		10,241		4,794
	Total revenue	$	100,483	$	116,582	$	95,872
	Property and equipment, net by location is presented below (in thousands):
		December 31, 2014		December 31, 2013
	United States	$	11,623	$	10,977
	Other	273		178
	Total property and equipment, net	$	11,896	$	11,155

Related_Parties

Related Parties	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Parties	Related Parties
	A venture capital firm that is a greater than 10% stockholder of the Company is a subsidiary of the financial institution that managed the Company's portfolio of marketable securities. The managing partner of this particular venture capital firm is also a member of the Company's board of directors.
	Certain parties affiliated with the Company purchased $17.0 million in aggregate principal amount of Notes and related Warrants. Mark Floyd, chief executive officer of the Company and chairman of the Company’s board of directors (the “Board”) purchased $2.0 million in aggregate principal amount of Notes and related Warrants, Michael Hatfield, president of the Company and a member of the Board purchased $4.0 million in aggregate principal amount of Notes and related Warrants, and affiliated funds of Norwest Venture Partners, with whom Promod Haque, a member of the Board, is affiliated, purchased $11.0 million in aggregate principal amount of Notes and related Warrants.

Organization_and_Significant_A1

Organization and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Description of the Business	Description of the Business — Cyan, Inc. (Cyan or the Company) was incorporated on October 25, 2006, in the state of Delaware and its principal executive offices are located in Petaluma, California. The Company has pioneered innovative, carrier-grade networking solutions that transform disparate and inefficient legacy networks into open, high-performance networks. The Company’s solutions include high-capacity, multi-layer switching and transport platforms as well as a carrier-grade software-defined networking platform and applications. The Company’s solutions enable its customers to virtualize their networks, accelerate service delivery and increase scalability and performance while reducing costs. The Company designed its solutions to provide a variety of existing and emerging premium applications including business Ethernet, wireless backhaul, broadband backhaul and cloud connectivity. The Company’s customers range from service providers to high-performance data center and large, private network operators.
Initial Public Offering	Initial Public Offering — In May 2013, the Company closed its initial public offering (IPO) whereby 8,899,022 shares of common stock were sold to the public, including 899,022 shares of common stock issued pursuant to the partial exercise of an overallotment option granted to the underwriters. The aggregate net proceeds received by the Company from the offering were $87.2 million, net of underwriting discounts and commissions and issuance expenses. Upon the closing of the IPO, all previously outstanding shares of the Company’s outstanding convertible preferred stock automatically converted into 33,897,005 shares of common stock. In addition, warrants to purchase shares of convertible preferred stock were exercised resulting in the issuance of 792,361 shares of common stock and the remaining outstanding warrants to purchase convertible preferred stock were converted into warrants to purchase 115,001 shares of common stock. In November 2013, the remaining warrants to purchase common stock were net exercised resulting in the issuance of 83,349 shares of common stock.
Principles of Consolidation	Principles of Consolidation — The Company's consolidated financial statements include its accounts and the accounts of its wholly-owned subsidiaries. Intercompany transactions and balances have been eliminated.
Fiscal Periods	Fiscal Periods — The Company operates on fiscal periods ending on the last day of the respective calendar quarter.
Use of Estimates	Use of Estimates — The preparation of financial statements in accordance with Generally Accepted Accounting Principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses for the reporting period. For the Company, these estimates include, but are not limited to, allowances for doubtful accounts, inventory valuation, excess and obsolete inventory, allowances for obligations to its contract manufacturer, useful lives assigned to long-lived assets, sales returns reserve, the fair value of stock awards, the fair value of a contingent conversion feature, a make-whole conversion adjustment, and certain interest features related to the Company's 8.0% convertible senior notes issued in December 2014 and due December 15, 2019 (the “Notes”) which are accounted for as a single compound embedded derivative (the “Compound Embedded Derivative”) and warrants associated the Notes. Notes, warranty costs, contingencies, accounting for income taxes, including the determination of the timing of the establishment or release of the Company's valuation allowance related to the Company's deferred tax asset balances and reserves for uncertain tax positions, and prior to the Company's initial public offering, the fair value of common and redeemable convertible preferred stock and related warrants. Actual results could differ from those estimates, and such differences could be material to the Company’s consolidated financial position and results of operations.
Cash and Cash Equivalents	Cash and Cash Equivalents — The Company considers all highly liquid investments with an original or remaining maturity of three months or less, when purchased, to be cash equivalents. At December 31, 2014 and 2013 cash equivalents consist primarily of money market funds, the cost of which approximates fair value.
Credit Risk and Concentrations	Credit Risk and Concentrations — Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, trade receivables and lease receivables.
	Cash and cash equivalents consist of cash and money market funds that are invested through financial institutions in the United States. Such deposits may, at times, exceed federally insured limits. The Company has not experienced any losses in such accounts.
	Available for sale marketable securities include U.S. treasury securities, U.S. government-sponsored agency securities, commercial paper, corporate bonds and municipal bonds. Investment policies have been implemented that limit the purchase of marketable securities to investment grade securities. Marketable securities that are downgraded after purchase are evaluated on a case by case basis by management to determine if they should be held or sold. Generally, the Company's marketable securities have maturity dates up to two years from the date of purchase and active markets for these securities exist.
	Management believes that the financial institutions that hold the Company’s cash, cash equivalents and marketable securities are financially sound and, accordingly, minimal credit risk exists with respect to these cash, cash equivalents and marketable securities.
	Concentrations of credit risk with respect to trade receivables exist to the full extent of amounts presented in the financial statements. The Company performs ongoing credit evaluations of its customers and generally does not require collateral from its customers to secure trade receivables. Trade receivables are derived from sales to customers located in the United States as well as those in international locations. The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The Company records a specific allowance based on an analysis of individual past-due balances, including evaluations of its customers’ financial condition. Additionally, based on its historical write-offs and collections experience, the Company records an additional allowance based on a percentage of outstanding receivables. These evaluations require significant judgment and are based on a variety of factors, including, but not limited to, current economic trends, payment history and financial review of the customer. Actual collection losses may differ from management’s estimates, and such differences could be material to the Company’s consolidated financial position and results of operations. The Company had $0.2 million and $0.1 million allowance for doubtful accounts recorded as of December 31, 2014 and 2013, respectively.
	The Company provides leasing arrangements for certain qualified end-user customers. The Company classifies these arrangements as lease receivables, which represent sales-type leases resulting from the sale of the Company’s products. Lease receivables consist of arrangements with the Company's customers, which generally have three year terms. As of December 31, 2014 and 2013 the Company had $0 million and $0.6 million of lease receivables and no allowance for credit losses as of that date.
	The Company depends on its contract manufacturer for its finished goods inventory. The Company operates under a manufacturing services agreement with its contract manufacturer pursuant to which the Company is to provide a rolling quarterly forecast indicating the Company’s monthly production requirements. While the Company seeks to maintain sufficient inventory on hand, the Company’s business and results of operations could be adversely affected by a stoppage or delay in receiving such products, the receipt of defective parts, an increase in the price of such products, or the Company’s inability to obtain lower prices from its contract manufacturer and suppliers in response to competitive pressures.
Inventories	Inventories — Inventories consisting of finished goods purchased from the contract manufacturer are stated at the lower of cost or market value, with cost being determined using standard cost, which approximates actual cost, on a first-in, first-out basis. The Company regularly monitors inventory quantities on hand and on order and records write-downs for excess and obsolete inventories as a component of cost of revenue. Write downs are recorded if the Company determines that demand for its products, potential obsolescence of technology, product life cycles, or pricing trends or forecasts indicate that the carrying value of inventory exceeds its estimated selling price. These factors are affected by market and economic conditions, technology changes, and new product introductions and require estimates that may include elements that are uncertain. Actual demand may differ from forecasted demand and may have a material effect on future gross margins. If inventory is written down, a new cost basis is established that cannot be increased in future periods.
Foreign Currency Translation	Foreign Currency Translation — The Company’s revenue contracts are denominated in U.S. dollars, but certain operating expenses are incurred in various foreign currencies. Generally, the functional currency of the Company’s foreign operations is the local country’s currency. For those entities where the functional currency is the local country's currency, the expenses of operations outside the U.S. are translated into U.S. dollars using average exchange rates for the period reported, while assets and liabilities of operations outside the U.S. are translated into U.S. dollars using the end-of-period exchange rates.
	Foreign currency translation adjustments not affecting net loss are included in stockholders’ deficit as a component of accumulated other comprehensive loss in the accompanying consolidated balance sheets.
	The revaluation effect of foreign currency fluctuations is recorded as foreign currency gain (loss) and included in other income (expense) in the accompanying consolidated statements of operations.
Property and Equipment, Net	Property and Equipment, Net — Property and equipment are stated at cost less accumulated depreciation and are depreciated on a straight-line basis over the estimated useful lives of the assets, generally three to five years. Leasehold improvements are amortized over the shorter of their estimated useful life, generally five to ten years, or the related remaining lease term. The costs of repairs and maintenance are expensed when incurred, while expenditures for refurbishments and improvements that significantly add to the productive capacity or extend the useful life of an asset are capitalized. When assets are retired or sold, the asset cost and related accumulated depreciation are eliminated, with any remaining gain or loss reflected in the accompanying consolidated statements of operations.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets — The Company periodically evaluates long-lived assets for impairment whenever events or changes in circumstances indicate that a potential impairment may have occurred. If such events or changes in circumstances arise, the Company compares the carrying amount of the long-lived assets to the estimated future undiscounted cash flows expected to be generated by the long-lived assets. If the estimated aggregate, undiscounted cash flows are less than the carrying amount of the long-lived assets, an impairment charge, calculated as the amount by which the carrying amount of the asset exceeds the fair value of the assets, is recorded. Through December 31, 2014 no impairment losses have been identified.
Revenue Recognition	Revenue Recognition — Revenue is recognized when all of the following criteria are met:
	•	Persuasive evidence of an arrangement exists. Customer purchase orders, along with master purchase contracts, where applicable, are generally used to determine the existence of an arrangement.
	•	Delivery has occurred. Shipping documents and customer acceptance, when applicable, are used to verify delivery.
	•	The price is fixed or determinable. The Company assesses whether the price is fixed or determinable based on the payment terms associated with the transaction and whether the sales price is subject to refund or adjustment.
	•	Collectability is reasonably assured. The Company assesses collectability based primarily on the creditworthiness of the customer as determined by credit checks and analysis, as well as the customer’s payment history.
	The Company derives revenue primarily from the sales of its hardware and software products as well as professional services. Shipping charges billed to customers are included in revenue.
	From time to time, the Company offers customers sales incentives, including discounts. Revenue is recorded net of these amounts. Customer payment terms generally range from 30 to 90 days. The Company generally does not offer extended payment terms.
	In 2013, a portion of the Company’s sales were made through multi-year lease agreements.  These lease agreements included a bargain purchase option and meet the criteria for treatment as sales-type leases. Under sales-type leases, the Company recognized revenue for its hardware products, net of post-installation product maintenance and technical support, at the net present value of the lease payment stream. The Company sought to optimize its cash flows by selling a majority of its lease receivables to third party financing organizations on a non-recourse basis.  Aside from its standard product warranty which is provided in the normal course of business, the Company has no obligation to the third party financing organizations once the lease receivables were sold.
	In general, the Company’s products and services qualify as separate units of accounting. Products are typically considered delivered upon shipment. In certain cases, the Company’s products are sold along with services, which include installation, training, remote network monitoring services, post-sales software support, software-as-a-service (SaaS) based subscriptions, and/or extended warranty services. Post-sales software support includes rights, on a when-and-if-available basis, to receive unspecified software product upgrades to embedded software or the Company’s management software; maintenance releases; and patches released during the term of the support contract. This type of transaction is considered a multiple-element arrangement. When accounting for multiple-element arrangements, GAAP requires the Company to allocate revenue to individual elements using vendor-specific objective evidence (VSOE), third-party evidence (TPE), or its best estimated selling price (BESP) of deliverables if VSOE or TPE cannot be determined.
	Multiple-element arrangements can include any combination of products and services. When allocating consideration, the Company will first do so on the basis of the deliverables’ relative selling prices, without regard to any contingent consideration, and then subsequently determine whether the revenue that may be recognized is limited based on the amount of non-contingent revenue. To the extent that the stated contractual prices agree to the Company’s estimated selling price on a standalone basis, the allocation of the consideration is based on stated contractual prices. However, if the stated contractual price for any deliverable is outside a narrow range of the estimated selling price on a standalone basis, the allocation is adjusted using the “relative-selling-price method.” Generally, the individual products and services meet the criteria for separate units of accounting and the Company recognizes revenue for each element upon delivery of the element.
	The Company has not yet established VSOE for all deliverables in its arrangements with multiple elements. When VSOE cannot be established, the Company attempts to establish the selling price of each element based upon TPE by evaluating the pricing of similar and interchangeable competitor products or services in standalone arrangements. However, as the Company’s products contain a significant element of proprietary technology and offer substantially different features and functionality from competitors, the Company has not been able to obtain comparable standalone pricing information with respect to competitors’ products. Therefore, the Company has historically not been able to obtain reliable evidence of TPE.
	When the Company is unable to establish a selling price using VSOE or TPE, the Company uses BESP. The objective of BESP is to determine the price at which the Company would transact a sale if the element was sold on a standalone basis.
	The Company determines BESP for an element by considering multiple factors, including, but not limited to, geographies, market conditions, competitive landscape, internal costs, gross margin objectives, characteristics of targeted customers, and pricing practices. The determination of BESP is made through consultation with and formal approval by the Company’s management, taking into consideration the go-to-market strategy. The Company regularly reviews VSOE, TPE, and BESP and has a process for the establishment and updating of these estimates.
	Post-sales software support revenue and extended warranty services revenue are deferred and recognized ratably over the period during which the services are to be performed. Installation and training service revenues are recognized upon delivery or completion of performance. These service arrangements are typically short-term in nature and are largely completed shortly after delivery of the product.
	The Company also delivers software-defined networking solutions to customers most frequently on a term license basis, with terms typically ranging from 12 to 36 months. While term-based licenses make up the majority of related revenues, the Company occasionally licenses software to customers on a perpetual basis with on-going support and maintenance services. Revenue from software that functions together with the tangible hardware elements to deliver the tangible products’ essential functionality is generally recognized upon shipment assuming all other revenue recognition criteria are met.  Revenue from application software and related software elements which are not considered essential to the functionality of hardware is accounted for in accordance with software industry guidance, and therefore is recognized ratably over the longest service period for post-contract customer support (PCS) and professional services as the Company has not established VSOE for software or the related software elements.
	In instances where substantive acceptance provisions are specified in the customer agreement, revenue is deferred until all acceptance criteria have been met. The Company’s arrangements generally do not include any provisions for cancellation, termination or refunds that would materially impact revenue recognition.
	The Company enters into arrangements with certain of its customers who receive government supported loans and grants from the U.S. Department of Agriculture’s Rural Utility Service (RUS) to finance capital spending. Under the terms of an RUS equipment contract that includes installation services, the customer does not take possession and control and the title does not pass until formal acceptance is obtained from the customer. Under this type of arrangement, the Company does not recognize revenue until it has received formal acceptance from the customer and all other revenue recognition criteria have been met.
	When the Company’s products have been delivered but the product revenue associated with the arrangement has been deferred as a result of not meeting the revenue recognition criteria, the related product costs are also deferred and included in deferred costs in the accompanying consolidated balance sheets.
Advertising Costs	Advertising Costs — Advertising costs, which are expensed and included in sales and marketing expense when incurred
Cost of Revenue	Cost of Revenue — Cost of revenue primarily consists of product manufacturing costs incurred with the Company’s contract manufacturer. Cost of revenue also includes third-party manufacturing and supply chain logistics costs, provisions for excess and obsolete inventory, warranty, hosting costs, certain allocated costs for facilities, depreciation and other expenses associated with logistics and quality control. Additionally, it includes salaries, benefits and stock-based compensation for personnel directly involved with manufacturing installation, maintenance and support services and the provision of the Company’s service offerings.
Research and Development	Research and Development — Research and development costs primarily include salaries and other personnel-related expenses, contractor fees, facility costs, supplies, and depreciation of equipment associated with the design and development of new products prior to the establishment of their technological feasibility. Such costs are charged to research and development expense as incurred.
	Development costs related to software incorporated in the Company’s products incurred subsequent to the establishment of technological feasibility and prior to the product being released would be capitalized and amortized over the estimated useful lives of the related products. Technological feasibility is established upon completion of a working model.
Warranties	Warranties — The Company generally offers limited warranties for its hardware products for periods of one to ten years. The Company recognizes estimated costs related to warranty activities as a component of cost of revenue upon product shipment. The estimates are based upon historical product failure rates and historical costs incurred in correcting product failures. The recorded amount is adjusted from time to time for specifically identified warranty exposures. Actual warranty expenses are charged against the Company’s estimated warranty liability when incurred. Factors that affect the Company’s liability include the number of installed units, historical and anticipated rates of warranty claims and the cost per claim.
	Additionally, the Company offers separately priced extended warranty contracts for coverage beyond the standard warranty period. The Company expenses all warranty costs as incurred related to such extended warranty contracts.
Income Taxes	Income Taxes — The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the temporary differences between the financial reporting and tax basis of assets and liabilities using enacted tax rates in effect for the years in which the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax laws is recognized in the consolidated statement of operations in the period that includes the enactment date. Valuation allowances are established when necessary to reduce deferred income tax assets to the amounts more-likely-than-not expected to be realized.
	As part of the process of preparing the consolidated financial statements, the Company is required to estimate income tax expense and uncertain tax positions in each of the tax jurisdictions in which the Company operates. This process involves estimating current income tax expense together with assessing temporary differences in the treatment of items for tax purposes versus financial accounting purposes that may create net deferred tax assets and liabilities. The Company relies on estimates and assumptions in preparing its income tax provision.
	The Company is subject to periodic audits by the Internal Revenue Service and other taxing authorities. The Company recognizes the tax benefit of an uncertain tax position only if it is more-likely-than-not that the position is sustainable upon examination by the taxing authority based on the technical merits. The tax benefit recognized is measured as the largest amount of benefit which is greater than 50 percent likely to be realized upon settlement with the taxing authority. The Company recognizes interest accrued and penalties related to unrecognized tax benefits in the income tax provision.
Stock–Based Compensation	Stock–Based Compensation — The Company measures and recognizes stock-based compensation expense in the financial statements for all share-based payment awards made to employees and directors based on the estimated fair values on the date of grant using the Black-Scholes option-pricing model.
	Prior to the Company's initial public offering in May 2013, the fair values of the common stock underlying share-based payment awards was determined by the board of directors, with input from management and a third-party valuation specialist. In the absence of a publicly traded market for the Company's common stock, the board of directors determined the fair value of the common stock in accordance with the guidelines outlined in the American Institute of Certified Public Accountants Practice Guide, Valuation of Privately-Held-Company Equity Securities Issued as Compensation.
	The Company’s determination of the fair value of a share based payment award on the date of grant using the Black-Scholes option pricing model is affected by assumptions regarding a number of subjective variables. These variables include the Company’s expected stock price volatility over the expected term of the awards, risk-free interest rates and expected dividends. The expected term represents the period that the award is expected to be outstanding. The expected term of stock options was estimated based on the simplified method that takes into consideration the vesting and contractual terms. Volatility is estimated based on the average of the historical volatilities of the common stock of the Company’s peer group in the industry in which the Company does business, with characteristics similar to those of the Company. The Company uses the U.S. Treasury yield for its risk-free interest rate and a dividend yield of zero, as it does not issue dividends.
	In addition to assumptions used in the Black-Scholes option pricing model, the Company must also estimate a forfeiture rate to calculate the stock-based compensation of its awards. The estimated forfeiture rate is based on an analysis of actual forfeitures and will continue to be evaluated based on actual forfeiture experience, analysis of employee turnover behavior and other factors. Further, to the extent the Company’s actual forfeiture rate is different from this estimate, which could be material, stock-based compensation is adjusted accordingly.
New Accounting Pronouncements	New Accounting Pronouncements — In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (ASU 2014-09), which provides guidance for revenue recognition. ASU 2014-09 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance.  Additionally, it supersedes some cost guidance included in Subtopic 605-35, Revenue Recognition-Construction-Type and Production-Type Contracts, and creates new Subtopic 340-40, Other Assets and Deferred Costs-Contracts with Customers. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the previous guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 requires retrospective application by either a “full retrospective” adoption in which the standard is applied to all of the periods presented or a “modified retrospective” adoption for fiscal years beginning after December 15, 2016. The standard will be effective for the Company in the first quarter of fiscal 2017. Early adoption is not permitted. The Company has not selected a transition method and is currently assessing the potential impact on its financial statements from adopting this new guidance.
	In August 2014 the FASB issued ASU 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. The ASU is intended to define management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern and to provide related footnote disclosures. For all entities, the ASU is effective for annual periods ending after December 15, 2016 and interim periods within annual periods beginning after December 15, 2016. The standard will be effective for the Company in the first quarter of fiscal 2017. Early adoption is permitted. The Company is currently assessing the potential impact on its financial statements from adopting this new guidance.

Fair_Value_Disclosure_Tables

Fair Value Disclosure (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurement on Company's Assets and Liabilities	The following tables set forth by level, within the fair value hierarchy, the Company’s assets and liabilities at fair value as of December 31, 2014 (in thousands):
			Level 1			Level 2			Level 3			Total
	Assets:
	Cash Equivalents:
	Money Market Funds		$	4,110		$	—		$	—		$	4,110
	Liabilities:
	Derivative Liabilities		$	—		$	—		$	36,280		$	36,280
	The following tables set forth by level, within the fair value hierarchy, the Company’s assets and liabilities at fair value as of December 31, 2013 (in thousands):
			Level 1			Level 2			Level 3			Total
	Assets:
	Cash Equivalents:
	Money Market Funds		$	13,452		$	—		$	—		$	13,452
	Marketable Securities:
	Commercial paper		$	—		$	19,687		$	—		$	19,687
	Corporate bonds		—			4,857			—			4,857
	Municipal bonds		—			1,026			—			1,026
	U.S. government-sponsored agency securities		—			2,031			—			2,031
	U.S. treasury securities		4,038			—			—			4,038
	Total marketable securities		$	4,038		$	27,601		$	—		$	31,639
Fair Value Liabilities Classified in Level 3	The following table summarizes the changes in liabilities classified in Level 3 for the year ended December 31, 2014. Gains and losses reported in this table include changes in fair value that are attributable to both observable and unobservable inputs (in thousands):
			Year Ended December 31, 2014
	Beginning balance		$	—
	Issuance of derivative liabilities and warrants with Notes		$	31,570
	Change in fair value of derivative liabilities		4,710
	Ending balance		$	36,280
Available-for-sale Securities	The following table shows the Company’s available-for-sale securities amortized cost, gross unrealized gains, gross unrealized losses and fair value as of December 31, 2013 (in thousands):
		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
	Marketable securities:
	Commercial paper	$	19,683		$	5		$	1		$	19,687
	Corporate bonds	4,854			4			1			4,857
	Municipal bonds	1,027			—			1			1,026
	U.S. government-sponsored agency securities	2,029			2			—			2,031
	U.S. treasury securities	4,030			8			—			4,038
	Total marketable securities	$	31,623		$	19		$	3		$	31,639

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Cash and Cash Equivalents	Cash and cash equivalents consisted of the following (in thousands):
		December 31, 2014			December 31, 2013
	Cash	$	43,630		$	19,057
	Money market funds	4,110			13,452
	Total cash and cash equivalents	$	47,740		$	32,509
Schedule of Allowance for Doubtful Accounts	The table below presents the changes in the allowance for doubtful accounts for the years ended December 31, 2014 and 2013 (in thousands):
		Year Ended December 31, 2014			Year Ended December 31, 2013
	Opening balance	$	147		$	—
	Provision for doubtful accounts	80			643
	Write offs	—			(496		)
	Closing balance	$	227		$	147
Schedule of Future Minimum Lease Payments for Capital Leases	At December 31, 2013, lease receivables consisted of the following (in thousands):
		December 31, 2013
	Net minimum lease payments to be received	$	639
	Less unearned interest income portion	35
	Total lease receivable	604
	Less short-term lease receivable	201
	Long-term lease receivable	$	403
Schedule of Inventories	Inventories consisted of finished goods purchased from the contract manufacturer and are stated at the lower of cost (on a first-in, first-out basis) or market value. Inventory consisted of the following (in thousands):
		December 31, 2014			December 31, 2013
	Raw materials	$	1,202		$	748
	Finished goods	11,160			19,998
	Total Inventory	$	12,362		$	20,746
Schedule of Property and Equipment, Net	Property and equipment, net consisted of the following (in thousands):
		December 31, 2014			December 31, 2013
	Lab equipment and tooling	$	18,303		$	14,743
	Software	628			667
	Leasehold improvements	1,569			1,595
	Furniture and fixtures	987			974
	Computer equipment	720			979
	Property and equipment, gross	22,207			18,958
	Less accumulated depreciation and amortization	(10,311		)	(7,803		)
	Property and equipment, net	$	11,896		$	11,155
Schedule of Accrued Liabilities	Accrued liabilities consisted of the following (in thousands):
		December 31, 2014			December 31, 2013
	Inventory-in-transit	$	1,516		$	344
	Warranty reserve (1)	2,564			1,374
	Sales returns reserve (2)	370			198
	Professional fees	1,137			862
	Sales and use taxes	201			497
	Other	987			511
	Total accrued liabilities	$	6,775		$	3,786
	-1	The table below presents the changes in warranty reserve for the years ended December 31, 2014 ,2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Beginning balance	$	1,374		$	1,266		$	783
	Charge to cost of sales	1,388			1,553			1,106
	Incremental warranty recoverable from component manufacturer	1,567			—			—
	Costs incurred	(1,765		)	(1,445		)	(623		)
	Closing balance	$	2,564		$	1,374		$	1,266
	During the three months ended June 30, 2014, the Company and a component manufacturer reached an agreement whereby the component manufacturer agreed to reimburse the Company for certain costs, up to an agreed maximum, associated with replacing defective products sold to customers. As of December 31, 2014, $1.2 million remains recoverable from this component manufacturer. This amount is classified within prepaid expenses and other on the consolidated balance sheets.
	(2) The table below presents the changes in the sales returns reserve for the years ended December 31, 2014 and 2013 (in thousands):
		Year Ended December 31, 2014			Year Ended December 31, 2013
	Opening balance	$	198		$	—
	Provision for sales returns	386			910
	Sales returns	(214		)	(712		)
	Closing balance	$	370		$	198

Convertible_Debt_Tables

Convertible Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Convertible Debt	The table below summarizes the issuance of the Notes as reflected in the balance sheet at December 31, 2014 (in thousands):
		December 31, 2014
	Gross Proceeds	$	50,000
	Initial value of Compound Embedded Derivative reported as debt discount	(26,965		)
	Initial value of common stock warrants reported as debt discount	(4,605		)
	Amortization of debt discount	68
	Ending balance	$	18,498

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Annual Obligations under Non-Cancellable Lease Agreements	Future minimum annual obligations under non-cancellable lease agreements as of December 31, 2014 are as follows (in thousands):
	Year ending December 31:
	2015	1,294
	2016	1,449
	2017	1,768
	2018	1,804
	2019	1,799
	Thereafter	9,950
	Total	$	18,064

Redeemable_Convertible_Preferr1

Redeemable Convertible Preferred Stock and Warrants (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Assumptions Used to Estimate Fair Value of Preferred Stock Warrant	The fair value of the outstanding preferred stock warrants was determined using the Black-Scholes-Merton option-pricing model. The fair value of the preferred stock warrant was estimated using the following assumptions for the periods presented below:
		Year Ended December 31,
		2013			2012
	Expected term (years)	0.48-3.24			0.80-3.49
	Volatility	55	%		55	%
	Risk-free interest rate	0.22-0.68%			0.25-0.36%
	Dividend yield	—			—
Change in the Fair Value of the Convertible Preferred Stock Warrant Liability	The change in the fair value of the convertible preferred stock warrant liability during the periods presented is summarized below (in thousands):
		Year Ended December 31,
		2013				2012
	Opening balance	$	6,254			$	900
	Increase (decrease) in fair value	2,602				5,354
	Reclassification of warrant liability to additional paid-in capital	(8,856		)		—
	Closing balance	$	—			$	6,254

Common_Stock_Tables

Common Stock (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	The following table shows the outstanding award balances and shares available for future issuance under the equity incentive plans at December 31, 2014:
		At December 31, 2014
	Options outstanding under 2006 Plan	10,234,590
	Options outstanding under 2013 Plan	1,097,039
	RSUs outstanding under 2013 Plan	3,067,728
	Shares reserved for future issuance under 2013 Plan	1,877,240
Nonvested Restricted Stock Shares Activity	The following table shows a summary of RSU activity, which includes PBRSUs, for the year ended December 31, 2014:
		Shares			Weighted-Average Grant Date Fair Value
	Unvested as of December 31, 2013	42,500			$	11
	Granted	4,784,704			$	3.48
	Vested	(662,195	)		$	4.49
	Forfeited	(1,097,281	)		$	3.88
	Unvested as of December 31, 2014	3,067,728
Allocation of Stock-Based Compensation Expense to Statements of Operations	A summary of the activity and changes during the year ended December 31, 2014 and a summary of information related to options exercisable and vested and expected to vest are presented below:
		Number of			Weighted				Weighted		Aggregate
		Shares			Average				Average		Intrinsic
		Outstanding			Exercise				Remaining		Value (in
					Price				Contractual		thousands)
									Life (Years)
	Balance at December 31, 2013	12,957,942			$	4.33			7.78		$	27,629
	Options granted	1,050,105			$	3.87
	Options exercised	(348,264	)		$	1.38
	Options forfeited	(1,518,154	)		$	7.38
	Balance at December 31, 2014	12,141,629			$	3.99			6.57		$	3,499
	Options vested and expected to vest - December 31, 2014	12,055,621			$	3.99			6.56		$	3,497
	Options exercisable - December 31, 2014	7,816,201			$	3.27			5.81		$	3,483
Black-Scholes-Merton Option-Pricing Model	The Company determined the fair value of each option grant on the date of grant using the Black-Scholes option-pricing model using the following factors:
			Year Ended December 31,
			2014			2013			2012
	Expected term (years)		6.08			6.08			6.08
	Volatility		41-44%			46-55%			55	%
	Risk-free interest rate		1.49-1.95%			0.70-1.75%			0.62-1.02%
	Dividend yield		—			—			—
Summary of Stock Options Activity	The following table summarizes the allocation of stock-based compensation in the accompanying consolidated statements of operations (in thousands):
			Year ended December 31,
			2014				2013				2012
	Cost of revenue		$	378			$	160			$	57
	Research and development		3,800				2,348				745
	Sales and marketing		3,701				2,165				656
	General and administrative		2,674				2,576				639
	Total stock-based compensation		$	10,553			$	7,249			$	2,097

Net_Loss_Per_Share_Tables

Net Loss Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Net Loss Per Share	The following table presents the calculation of basic and diluted net loss per share (in thousands, except per share data:
		Year ended December 31,
		2014				2013			2012
	Net loss	$	(59,224	)		$	(40,732	)	$	(16,601	)
	Weighted-average shares used to compute basic and diluted net loss per share	46,956				30,836			2,515
	Basic and diluted net loss per share	$	(1.26	)		$	(1.32	)	$	(6.60	)
Securities Excluded from Calculation of Diluted Net Loss Per Share	The following securities were excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would have been anti-dilutive for the periods presented (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Redeemable convertible preferred stock	—			—			33,897
	Employee stock options	12,142			12,958			10,213
	Restricted stock units	3,149			43			—
	Convertible preferred stock warrants	—			—			1,010
	Shares underlying the Notes	20,470			—			—
	Common stock warrants	11,250			—			—
	Total	47,011			13,001			45,120

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	The following table presents domestic and foreign components of loss before provision for income taxes (in thousands):
		Year Ended December 31,
		2014				2013				2012
	United States	$	(44,385	)		$	(39,068	)		$	(16,725	)
	Foreign	(14,559		)		(1,521		)		164
	Total	$	(58,944	)		$	(40,589	)		$	(16,561	)
Schedule of Components of Income Tax Expense (Benefit)	The components of the provision for income taxes are as follows (in thousands):
		Year Ended December 31,
		2014				2013				2012
	Current:
	Federal	$	—			$	—			$	—
	State	18				20				6
	Foreign	251				156				34
	Total current	269				176				40
	Deferred:
	Federal	—				—				—
	State	—				—				—
	Foreign	11				(33		)		—
	Total deferred	11				(33		)		—
	Total provision	$	280			$	143			$	40
Schedule of Effective Income Tax Rate Reconciliation	The following table presents a reconciliation of the statutory federal rate and the Company’s effective tax rate for the periods presented:
		Year Ended December 31,
		2014			2013			2012
	Federal income tax at statutory rate	34	%		34	%		34	%
	State income tax, net of federal benefit	2			2			5.2
	Foreign taxes at less than statutory rate	(8.9	)		(1.6	)		0.1
	Intercompany transactions	—			(21.4	)		—
	Nondeductible stock-based compensation	(1.9	)		(2.9	)		(3.0	)
	Nondeductible warrant/derivative fair value adjustment	(2.7	)		(2.2	)		(11.0	)
	Other permanent differences	0.1			(0.4	)		—
	Tax credits generated in current year	1.9			4.1			—
	Valuation allowance change	(24.0	)		(12.0	)		(25.5	)
	Total	0.5	%		(0.4	)%		(0.2	)%
Schedule of Deferred Tax Assets and Liabilities	The following table presents significant components of the Company’s deferred tax assets (in thousands):
		December 31,
		2014				2013
	Deferred tax assets:
	Deferred revenue	$	1,046			$	2,417
	Accrued expenses and reserves	7,292				4,319
	Loss carryforwards	37,118				27,687
	Tax credit carryforwards	7,767				5,870
	Contribution carryforwards	1				1
	Gross deferred tax assets	53,224				40,294
	Valuation allowance	(53,061		)		(38,937		)
	Net deferred tax assets	163				1,357
	Deferred tax liabilities:
	Basis difference for fixed assets	(145		)		(1,326		)
	Total deferred tax liabilities	(145		)		(1,326		)
	Net deferred tax assets	$	18			$	31
Schedule of Unrecognized Tax Benefits Roll Forward	The following table reflects changes in the unrecognized tax benefits (in thousands):
		December 31,
		2014				2013				2012
	Unrecognized tax benefits as of the beginning of the year	$	6,626			$	1,444			$	1,212
	Increase related to prior year tax provisions	—				202				—
	Decrease related to prior year tax provisions	749				—				—
	Increase related to current year tax provisions	—				4,980				232
	Unrecognized tax benefits as of the end of the year	$	7,375			$	6,626			$	1,444

Concentration_Tables

Concentration (Tables)	12 Months Ended
	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Customers With 10% or Greater of Total Accounts Receivable and Net Revenue	Customers with a receivables balance of 10% or greater of the total receivables, which includes accounts receivable and lease receivables, and customers with revenue of 10% or greater of the total revenue are as follows:
		Year Ended December 31,						As of December 31,
		2014		2013		2012		2014		2013
		Percentage of Revenue						Percentage of Receivables
	Windstream	29	%	39	%	45	%	59	%	*
	Colt Technology Services Ltd. and its affiliated entity KVH Company, Ltd.	11	%	*		*		*		*
	TDS	*		11	%	*		*		*
	*Represents less than 10%

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule of Revenue and Property and Equipment, net , by Geographical Areas	Revenue information by location is presented below (in thousands):
		Year Ended December 31,
		2014		2013		2012
	United States	$	78,608	$	106,341	$	91,078
	Other	21,875		10,241		4,794
	Total revenue	$	100,483	$	116,582	$	95,872
	Property and equipment, net by location is presented below (in thousands):
		December 31, 2014		December 31, 2013
	United States	$	11,623	$	10,977
	Other	273		178
	Total property and equipment, net	$	11,896	$	11,155

Organization_and_Significant_A2

Organization and Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended			1 Months Ended
	31-May-13	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Nov. 30, 2013	Dec. 12, 2014
Conversion of Stock [Line Items]
Aggregate net proceeds from offering, net of underwriting discounts and commissions	$87,200,000	$0	$88,369,000	$0
Allowance for doubtful accounts		227,000	147,000
Total lease receivable		0	604,000
Allowance for credit losses		0	0
Advertising costs		300,000	300,000	200,000
Warranty period description		The Company generally offers limited warranties for its hardware products for periods of one to ten years.
Threshold recognizes tax benefit		50.00%
Minimum warranty term		1 year
Maximum warranty term		10 years
Dividend yield		0.00%
Common Stock [Member]
Conversion of Stock [Line Items]
Initial public offering common stock sold to public, shares			8,899,022
Outstanding warrants to purchase convertible preferred stock converted into shares of common stock, shares					83,349
Warrant [Member]
Conversion of Stock [Line Items]
Dividend yield		0.00%	0.00%
IPO [Member]
Conversion of Stock [Line Items]
Initial public offering common stock sold to public, shares	8,899,022
Overallotment option granted to the underwriters, shares	899,022
Aggregate net proceeds from offering, net of underwriting discounts and commissions	$87,200,000
IPO [Member] | Preferred Stock [Member]
Conversion of Stock [Line Items]
Conversion of stock, shares converted	33,897,005
IPO [Member] | Common Stock [Member]
Conversion of Stock [Line Items]
Outstanding warrants to purchase convertible preferred stock converted into shares of common stock, shares	792,361
IPO [Member] | Warrant [Member] | Warrants To Purchase Convertible Preferred Stock Converted To Warrants To Purchase Common Stock [Member]
Conversion of Stock [Line Items]
Conversion of stock, shares converted	115,001
Minimum [Member]
Conversion of Stock [Line Items]
Payment terms to customers		30 days
Software license term		12 months
Maximum [Member]
Conversion of Stock [Line Items]
Payment terms to customers		90 days
Software license term		36 months
Property and Equipment [Member] | Minimum [Member]
Conversion of Stock [Line Items]
Property and equipment, useful life		3 years
Property and Equipment [Member] | Maximum [Member]
Conversion of Stock [Line Items]
Property and equipment, useful life		5 years
Leasehold Improvements [Member] | Minimum [Member]
Conversion of Stock [Line Items]
Property and equipment, useful life		5 years
Leasehold Improvements [Member] | Maximum [Member]
Conversion of Stock [Line Items]
Property and equipment, useful life		10 years
Convertible Debt [Member] | 8.0% Convertible Senior Notes, Mature 2019 [Member]
Conversion of Stock [Line Items]
Stated interest rate (percent)		8.00%				8.00%

Fair_Value_Disclosure_Addition

Fair Value Disclosure - Additional Information (Details) (USD $)	Dec. 12, 2014	Dec. 31, 2013	Dec. 31, 2014
		position
Debt Instrument [Line Items]
Aggregate principal amount	$50,000,000
Marketable securities in a continuous unrealized loss position for more than twelve months		0
8.0% Convertible Senior Notes, Mature 2019 [Member] | Convertible Debt [Member]
Debt Instrument [Line Items]
Aggregate principal amount	$50,000,000		$50,000,000
Stated interest rate (percent)	8.00%		8.00%

Fair_Value_Disclosure_Fair_Val

Fair Value Disclosure - Fair Value Measurement on Company's Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	$31,639
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	19,687
Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	4,857
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	1,026
US Government-Sponsored Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	2,031
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	4,038
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		31,639
Recurring [Member] | Derivative Financial Instruments, Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	36,280
Recurring [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		19,687
Recurring [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		4,857
Recurring [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		1,026
Recurring [Member] | US Government-Sponsored Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		2,031
Recurring [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		4,038
Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents	4,110	13,452
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		4,038
Recurring [Member] | Level 1 [Member] | Derivative Financial Instruments, Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	0
Recurring [Member] | Level 1 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 1 [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 1 [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 1 [Member] | US Government-Sponsored Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 1 [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		4,038
Recurring [Member] | Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents	4,110	13,452
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		27,601
Recurring [Member] | Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	0
Recurring [Member] | Level 2 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		19,687
Recurring [Member] | Level 2 [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		4,857
Recurring [Member] | Level 2 [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		1,026
Recurring [Member] | Level 2 [Member] | US Government-Sponsored Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		2,031
Recurring [Member] | Level 2 [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 2 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents	0	0
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	36,280
Recurring [Member] | Level 3 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 3 [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 3 [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 3 [Member] | US Government-Sponsored Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 3 [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities		0
Recurring [Member] | Level 3 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents	$0	$0

Fair_Value_Disclosure_Fair_Val1

Fair Value Disclosure - Fair Value Liabilities Classified in Level 3 (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$0
Issuance of derivative liabilities and warrants with Notes	31,570
Change in fair value of derivative liabilities	4,710
Ending balance	$36,280

Fair_Value_Disclosure_Amortize

Fair Value Disclosure - Amortized Cost Reconciliation (Details) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$31,623
Gross Unrealized Gains	19
Gross Unrealized Losses	3
Fair Value	31,639
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	19,683
Gross Unrealized Gains	5
Gross Unrealized Losses	1
Fair Value	19,687
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,854
Gross Unrealized Gains	4
Gross Unrealized Losses	1
Fair Value	4,857
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,027
Gross Unrealized Gains	0
Gross Unrealized Losses	1
Fair Value	1,026
US Government-Sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,029
Gross Unrealized Gains	2
Gross Unrealized Losses	0
Fair Value	2,031
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,030
Gross Unrealized Gains	8
Gross Unrealized Losses	0
Fair Value	$4,038

Balance_Sheet_Components_Addit

Balance Sheet Components - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Lease receivables sold	$600,000	$9,200,000
Cash proceeds from sale of lease receivables		9,200,000
Inventory write-down			1,200,000	1,000,000
Depreciation and amortization expense			$3,589,000	$2,721,000	$1,801,000

Balance_Sheet_Components_Sched

Balance Sheet Components - Schedule of Cash and Cash Equivalents (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash	$43,630	$19,057
Money market funds	4,110	13,452
Total cash and cash equivalents	$47,740	$32,509	$20,221	$25,740

Balance_Sheet_Components_Allow

Balance Sheet Components - Allowance for Doubtful Accounts Receivable (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Opening balance	$147,000	$0
Provision for doubtful accounts	80,000	643,000	0
Write offs	0	-496,000	0
Closing balance	$227,000	$147,000	$0

Balance_Sheet_Components_Capit

Balance Sheet Components - Capital lease receivables (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net minimum lease payments to be received		$639
Less unearned interest income portion		35
Total lease receivable	0	604
Less short-term lease receivable	0	201
Long-term lease receivable	$0	$403

Balance_Sheet_Components_Sched1

Balance Sheet Components - Schedule of Inventories (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$1,202	$748
Finished goods	11,160	19,998
Total Inventory	$12,362	$20,746

Balance_Sheet_Components_Sched2

Balance Sheet Components - Schedule of Property and Equipment, Net (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$22,207	$18,958
Less accumulated depreciation and amortization	-10,311	-7,803
Property and equipment, net	11,896	11,155
Lab Equipment and Tooling [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,303	14,743
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	628	667
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,569	1,595
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	987	974
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$720	$979

Balance_Sheet_Components_Sched3

Balance Sheet Components - Schedule of Accrued Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Inventory-in-transit	$1,516	$344
Warranty reserve	2,564	1,374	1,266	783
Sales returns reserve	370	198
Professional fees	1,137	862
Sales and use taxes	201	497
Other	987	511
Total accrued liabilities	$6,775	$3,786

Balance_Sheet_Components_Sched4

Balance Sheet Components - Schedule of Activity Related to Warranties (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$1,374,000	$1,266,000	$783,000
Charge to cost of sales	1,388,000	1,553,000	1,106,000
Incremental warranty recoverable from component manufacturer	1,567,000	0	0
Costs incurred	-1,765,000	-1,445,000	-623,000
Closing balance	2,564,000	1,374,000	1,266,000
Other receivable related to warranty liability recoverable from a component manufacturer	$1,200,000

Balance_Sheet_Components_Allow1

Balance Sheet Components - Allowance for Sales Returns (Details) (Allowance for Sales Returns [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Opening balance	$198,000	$0
Provision for sales returns	386,000	910,000
Sales returns	-214,000	-712,000	0
Closing balance	$370,000	$198,000	$0

Debt_Additional_Information_De

Debt - Additional Information (Detail) (Loan and Security Agreement [Member], Silicon Valley Bank [Member], USD $)	Dec. 31, 2013	Dec. 21, 2012
Debt Instrument [Line Items]
Loan facility, maximum borrowing capacity		$15,000,000
Revolving loans [Member]
Debt Instrument [Line Items]
Loan facility, maximum borrowing capacity		10,000,000
Loan facility, amount outstanding	0
Term loan [Member]
Debt Instrument [Line Items]
Loan facility, maximum borrowing capacity		5,000,000
Loan facility, amount outstanding	$5,000,000

Convertible_Debt_Narrative_Det

Convertible Debt (Narrative) (Details) (USD $)	0 Months Ended
	Dec. 12, 2014	Dec. 31, 2014	Dec. 31, 2013
	D
Debt Instrument [Line Items]
Aggregate principal amount	$50,000,000
Common stock, par value		$0.00	$0.00
Discounted amount on debt issuance	3,400,000
Convertible Debt [Member] | 8.0% Convertible Senior Notes, Mature 2019 [Member]
Debt Instrument [Line Items]
Aggregate principal amount	50,000,000	50,000,000
Stated interest rate (percent)	8.00%	8.00%
Aggregate shares of common stock called by warrants	11,250,000
Underwriters' fee	2,300,000
Debt issuance cost	3,500,000
Proceeds from debt, net of issuance costs	46,500,000
Escrow deposits to pay for the first six schedule payments	12,000,000
Notes conversion ratio	0.4093998
Conversion price per share	$2.44
Debt redemption threshold trading days	20
Debt redemption threshold consecutive trading days	30 days
Debt redemption threshold trading days prior to redemption notification	3 days
Debt redemption, threshold percentage of stock price trigger	140.00%
Number of shares of common stock for each $1000 principal amount of Notes	225
Exercise price of warrants	3.62
Discounted amount on debt issuance	$18,400,000
Effective interest rate of debt instrument	48.90%

Convertible_Debt_Details

Convertible Debt (Details) (USD $)	1 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 12, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Gross Proceeds		$50,000
Initial value of Compound Embedded Derivative reported as debt discount	-26,965
Initial value of common stock warrants reported as debt discount	-4,605
Amortization of debt discount	68
Ending balance	$18,498		$0

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014	Jul. 31, 2013
	case				sqft
Property Subject to or Available for Operating Lease [Line Items]
Remaining lease obligations	$18,064,000
Percentage of interest in limited liability company from which the Company is leasing building	40.00%
Accounts payable, related parties	0	0
Accrued expense, related parties	0	0
Total deferred rent		600,000		500,000
Rent expense	1,100,000	800,000	500,000
Number of pending cases	2
Commitments to contract manufacturer	9,700,000	7,900,000
Petaluma, CA [Member]
Property Subject to or Available for Operating Lease [Line Items]
Office premises for lease	18,895
Remaining lease obligations	6,000,000
Total base rent payable	$11,500,000
Renewal term	5 years
Petaluma, CA [Member] | Term 1 [Member] | Property Subject to Operating Lease [Member]
Property Subject to or Available for Operating Lease [Line Items]
Area of commercial building leased					20,005
Petaluma, CA [Member] | Term 2 [Member] | Property Subject to Operating Lease [Member]
Property Subject to or Available for Operating Lease [Line Items]
Additional area to be leased					18,773

Commitments_and_Contingencies_2

Commitments and Contingencies - Future Minimum Annual Obligations under Non-Cancellable Lease Agreements (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Commitments and Contingencies Disclosure [Abstract]
2015	$1,294
2016	1,449
2017	1,768
2018	1,804
2019	1,799
Thereafter	9,950
Total	$18,064

Redeemable_Convertible_Preferr2

Redeemable Convertible Preferred Stock and Warrants - Additional Information (Detail)	1 Months Ended
	Nov. 30, 2013	31-May-13	Dec. 31, 2014
Series A Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Aggregate shares of common stock called by warrants			12,806
Exercise price of warrants			1.3
Series B Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Aggregate shares of common stock called by warrants			102,195
Exercise price of warrants			2.45
Convertible preferred stock warrants [Member]
Class of Warrant or Right [Line Items]
Class of warrants exercised		894,596
Common Stock [Member]
Class of Warrant or Right [Line Items]
Outstanding warrants to purchase convertible preferred stock converted into shares of common stock, shares	83,349
IPO [Member] | Common Stock [Member]
Class of Warrant or Right [Line Items]
Outstanding warrants to purchase convertible preferred stock converted into shares of common stock, shares		792,361
Warrants To Purchase Convertible Preferred Stock Converted To Warrants To Purchase Common Stock [Member] | IPO [Member] | Warrant [Member]
Class of Warrant or Right [Line Items]
Conversion of stock, shares converted		115,001

Redeemable_Convertible_Preferr3

Redeemable Convertible Preferred Stock and Warrants - Assumptions Used to Estimate Fair Value of Preferred Stock Warrant (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Dividend yield	0.00%
Warrant [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Volatility	55.00%	55.00%
Dividend yield	0.00%	0.00%
Minimum [Member] | Warrant [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Expected term (years)	5 months 23 days	9 months 18 days
Risk-free interest rate	0.22%	0.25%
Maximum [Member] | Warrant [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Expected term (years)	3 years 2 months 27 days	3 years 5 months 27 days
Risk-free interest rate	0.68%	0.36%

Redeemable_Convertible_Preferr4

Redeemable Convertible Preferred Stock and Warrants - Change in the Fair Value of the Convertible Preferred Stock Warrant Liability (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Warrants and Rights Outstanding [Roll Forward]
Opening balance	$0	$6,254	$900
Increase (decrease) in fair value	4,710	2,602	5,354
Reclassification of warrant liability to additional paid-in capital		-8,856	0
Closing balance		$0	$6,254

Common_Stock_Additional_Inform

Common Stock - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended			0 Months Ended	1 Months Ended
	31-May-13	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 02, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net proceeds after deducting underwriters' discounts and commissions and offering expenses	$87,200,000	$0	$88,369,000	$0
Common stock, shares outstanding		47,305,129	46,536,436
Common stock, shares issued		47,305,129	46,536,436
Common stock shares authorized		1,000,000,000	1,000,000,000
Preferred stock shares authorized		20,000,000	20,000,000
Options outstanding		12,141,629	12,957,942
Employee stock-based compensation		10,553,000	7,249,000	2,097,000
Period for recognition		2 years 2 months 12 days
Fair value of options granted		1,700,000	18,400,000	13,300,000
Weighted-average fair value of options granted		$1.60	$4.99	$2.15
Intrinsic value of employee options exercised		700,000	1,500,000	300,000
Unamortized stock-based compensation expense		12,400,000
2006 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding		10,234,590
2013 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant						11,400,000
Number of shares authorized						3,600,000
Additional shares of common stock reserved for future issuance		1,378,050			2,094,194	204,730
Minimum number of additional shares to be authorized		5,000,000
Percentage of outstanding stock, maximum		4.50%
Options outstanding		1,097,039
RSUs outstanding under 2013 Plan		3,067,728
Shares reserved for future issuance under 2013 Plan		1,877,240
IPO [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Initial public offering common stock sold to public, shares	8,899,022
Common stock shares sold as result of underwriters exercise of over allotment option, shares	899,022
Public offering price per share	$11
Gross proceeds from offering to the Company	97,900,000
Net proceeds after deducting underwriters' discounts and commissions and offering expenses	87,200,000
Preferred Stock [Member] | IPO [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion of stock, shares converted	33,897,005
Employee stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, expiration term		10 years
Stock options, vesting term		4 years
Employee stock options [Member] | 2006 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, expiration term				10 years
Stock options, vesting term				4 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, vesting term				4 years
Aggregate intrinsic value		9,900,000
Employee stock-based compensation		3,300,000
Unrecognized compensation expense		$9,000,000
Period for recognition		1 year 1 month 6 days

Common_Stock_Nonvested_Restric

Common Stock - Nonvested Restricted Stock Shares Activity (Details) (Restricted Stock Units (RSUs) [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock Units (RSUs) [Member]
Shares
Unvested as of December 31, 2013	42,500
Granted	4,784,704
Vested	-662,195
Forfeited	-1,097,281
Unvested as of December 31, 2014	3,067,728
Weighted-Average Grant Date Fair Value
Unvested as of December 31, 2013		$11
Granted	$3.48
Vested	$4.49
Forfeited	$3.88

Common_Stock_Summary_of_Stock_

Common Stock - Summary of Stock Options Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares Outstanding, Beginning of period	12,957,942
Number of Shares Outstanding, Options granted	1,050,105
Number of Shares Outstanding, Options exercised	-348,264
Number of Shares Outstanding, Options forfeited	-1,518,154
Number of Shares Outstanding, End of period	12,141,629	12,957,942
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Beginning of period	$4.33
Weighted Average Exercise Price, Options granted	$3.87
Weighted Average Exercise Price, Options exercised	$1.38
Weighted Average Exercise Price, Options forfeited	$7.38
Weighted Average Exercise Price, End of period	$3.99	$4.33
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Number of Shares Outstanding, Options vested and expected to vest, End of period	12,055,621
Weighted Average Exercise Price, Options vested and expected to vest, End of period	$3.99
Weighted Average Remaining Contractual Life (Years), Options vested and expected to vest	6 years 6 months 22 days
Aggregate Intrinsic Value, Options vested and expected to vest, end of period	$3,497
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Life (Years)	6 years 6 months 26 days	7 years 9 months 10 days
Aggregate Intrinsic Value	3,499	27,629
Number of Shares Outstanding, Options exercisable, End of period	7,816,201
Weighted Average Exercise Price, Options exercisable, End of period	$3.27
Weighted Average Remaining Contractual Life (Years), Options exercisable	5 years 9 months 22 days
Aggregate Intrinsic Value, Options exercisable, end of period	$3,483

Common_Stock_BlackScholesMerto

Common Stock - Black-Scholes-Merton Option-Pricing Model (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	6 years 0 months 29 days	6 years 0 months 29 days	6 years 0 months 29 days
Volatility			55.00%
Dividend yield	0.00%	0.00%	0.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	41.00%	46.00%
Risk-free interest rate	1.49%	0.70%	0.62%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	44.00%	55.00%
Risk-free interest rate	1.95%	1.75%	1.02%

Common_Stock_Allocation_of_Sto

Common Stock - Allocation of Stock-Based Compensation Expense to Statements of Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Employee stock-based compensation	$10,553	$7,249	$2,097
Cost of revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Employee stock-based compensation	378	160	57
Research and development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Employee stock-based compensation	3,800	2,348	745
Sales and marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Employee stock-based compensation	3,701	2,165	656
General and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Employee stock-based compensation	$2,674	$2,576	$639

Net_Loss_Per_Share_Calculation

Net Loss Per Share - Calculation of Basic and Diluted Net Loss Per Share (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net loss	($59,224)	($40,732)	($16,601)
Weighted-average shares used to compute basic and diluted net loss per share (in shares)	46,956	30,836	2,515
Basic and diluted net loss per share (in dollars per share)	($1.26)	($1.32)	($6.60)

Net_Loss_Per_Share_Securities_

Net Loss Per Share - Securities were excluded from Calculation of Diluted Net Loss Per Share (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities were excluded from calculation of diluted net loss per share	47,011	13,001	45,120
Redeemable convertible preferred stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities were excluded from calculation of diluted net loss per share	0	0	33,897
Employee stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities were excluded from calculation of diluted net loss per share	12,142	12,958	10,213
Restricted stock units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities were excluded from calculation of diluted net loss per share	3,149	43	0
Convertible preferred stock warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities were excluded from calculation of diluted net loss per share	0	0	1,010
Shares underlying the Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities were excluded from calculation of diluted net loss per share	20,470	0	0
Common stock warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities were excluded from calculation of diluted net loss per share	11,250	0	0

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Unrecognized tax benefits, stock options	$400,000	$200,000
Unrecognized tax benefits	7,375,000	6,626,000	1,444,000	1,212,000
Unrecognized tax benefits that would impact effective tax rate	0
Interest and penalties accrued on any unrecognized tax benefits	0	0	0
Undistributed earnings of foreign subsidiaries	600,000
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	108,100,000
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	5,900,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	84,100,000
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member] | California [Member]
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	6,600,000
Valuation Allowance of Deferred Tax Assets [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance change	$14,100,000	$4,900,000

Income_Taxes_Income_before_Inc

Income Taxes - Income before Income Tax, Domestic and Foreign (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
United States	($44,385)	($39,068)	($16,725)
Foreign	-14,559	-1,521	164
Loss before provision for income taxes	($58,944)	($40,589)	($16,561)

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Tax Expense (Benefit) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$0	$0	$0
State	18	20	6
Foreign	251	156	34
Total current	269	176	40
Deferred:
Federal	0	0	0
State	0	0	0
Foreign	11	-33	0
Total deferred	11	-33	0
Total provision	$280	$143	$40

Income_Taxes_Effective_Income_

Income Taxes - Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal income tax at statutory rate	34.00%	34.00%	34.00%
State income tax, net of federal benefit	2.00%	2.00%	5.20%
Foreign taxes at less than statutory rate	-8.90%	-1.60%	0.10%
Intercompany transactions	0.00%	-21.40%	0.00%
Nondeductible stock-based compensation	-1.90%	-2.90%	-3.00%
Nondeductible warrant/derivative fair value adjustment	-2.70%	-2.20%	-11.00%
Other permanent differences	0.10%	-0.40%	0.00%
Tax credits generated in current year	1.90%	4.10%	0.00%
Valuation allowance change	-24.00%	-12.00%	-25.50%
Total	0.50%	-0.40%	-0.20%

Income_Taxes_Components_of_Def

Income Taxes - Components of Deferred Tax Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]
Deferred revenue	$1,046	$2,417
Accrued expenses and reserves	7,292	4,319
Loss carryforwards	37,118	27,687
Tax credit carryforwards	7,767	5,870
Contribution carryforwards	1	1
Gross deferred tax assets	53,224	40,294
Valuation allowance	-53,061	-38,937
Net deferred tax assets	163	1,357
Basis difference for fixed assets	-145	-1,326
Total deferred tax liabilities	-145	-1,326
Net deferred tax assets	$18	$31

Income_Taxes_Unrecognized_Tax_

Income Taxes - Unrecognized Tax Benefits (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits as of the beginning of the year	$6,626	$1,444	$1,212
Increase related to prior year tax provisions	0	202	0
Decrease related to prior year tax provisions	749	0	0
Increase related to current year tax provisions	0	4,980	232
Unrecognized tax benefits as of the end of the year	$7,375	$6,626	$1,444

Employee_Benefit_Plan_Addition

Employee Benefit Plan - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Employer contribution in the defined contribution plan	$0	$0	$0

Concentration_Customers_With_1

Concentration - Customers With 10% or Greater of Total Accounts Receivable and Net Revenue (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Percentage of Revenue [Member] | Windstream [Member]
Concentration Risk [Line Items]
Concentration risk percentage	29.00%	39.00%	45.00%
Percentage of Revenue [Member] | Colt Technology Services Ltd. and its affiliated entity KVH Company, Ltd. [Member]
Concentration Risk [Line Items]
Concentration risk percentage	11.00%
Percentage of Revenue [Member] | TDS [Member]
Concentration Risk [Line Items]
Concentration risk percentage		11.00%
Percentage of Accounts Receivable [Member] | Windstream [Member]
Concentration Risk [Line Items]
Concentration risk percentage	59.00%

Segment_Information_Additional

Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
	Segment
Segment Reporting [Abstract]
Number of operating segment	1
Number of reporting segment	1

Segment_Information_Revenues_D

Segment Information - Revenues (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$100,483	$116,582	$95,872
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	78,608	106,341	91,078
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$21,875	$10,241	$4,794

Segment_Information_Property_a

Segment Information - Property and Equipment (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$11,896	$11,155
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	11,623	10,977
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$273	$178

Related_Parties_Details

Related Parties (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2014
Related Party Transactions [Abstract]
Ownership percentage by third party, greater than	10.00%
Related Party Transaction [Line Items]
Notes payable, related parties		$17
Chief Executive Officer [Member]
Related Party Transaction [Line Items]
Notes payable, related parties		2
President [Member]
Related Party Transaction [Line Items]
Notes payable, related parties		4
Entity Affiliated with a Member of the Board [Member]
Related Party Transaction [Line Items]
Notes payable, related parties		$11