Aspen Aerogels (ASPN) 10-K 2 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Mar. 01, 2017	Jun. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	ASPN
Entity Registrant Name	ASPEN AEROGELS INC
Entity Central Index Key	1,145,986
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		23,369,838
Entity Public Float			$ 98.3

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 18,086	$ 32,804
Accounts receivable, net of allowances of $93 and $89	17,535	20,624
Inventories	12,868	6,532
Prepaid expenses and other current assets	1,697	1,687
Total current assets	50,186	61,647
Property, plant and equipment, net	84,394	78,322
Other long-term assets	89	105
Total assets	134,669	140,074
Current liabilities:
Capital leases, current portion	35	67
Accounts payable	13,065	10,684
Accrued expenses	3,987	5,568
Deferred revenue	1,043	681
Other current liabilities	154	409
Total current liabilities	18,130	17,409
Capital leases, excluding current portion	4	40
Other long-term liabilities	971	151
Total liabilities	19,105	17,600
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.00001 par value; 5,000,000 shares authorized, no shares issued or outstanding at December 31, 2016 and 2015
Common stock, $0.00001 par value; 125,000,000 shares authorized, 23,369,838 shares issued and outstanding at December 31, 2016; 23,184,852 shares issued and outstanding at December 31, 2015	0	0
Additional paid-in capital	533,088	527,975
Accumulated deficit	(417,524)	(405,501)
Total stockholders’ equity	115,564	122,474
Total liabilities and stockholders’ equity	$ 134,669	$ 140,074

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 93	$ 89
Preferred stock, par value	$ 0.00001	$ 0.00001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, shares authorized	125,000,000	125,000,000
Common stock, shares issued	23,369,838	23,184,852
Common stock, shares outstanding	23,369,838	23,184,852

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue:
Product	$ 115,490	$ 120,532	$ 99,259
Research services	2,248	1,986	3,140
Total revenue	117,738	122,518	102,399
Cost of revenue:
Product	93,123	96,865	83,677
Research services	1,304	1,005	1,642
Gross profit	23,311	24,648	17,080
Operating expenses:
Research and development	5,306	5,253	5,980
Sales and marketing	11,810	10,562	10,290
General and administrative	17,415	15,068	16,853
Total operating expenses	34,531	30,883	33,123
Loss from operations	(11,220)	(6,235)	(16,043)
Other expense, net:
Financing costs	(656)		(47)
Interest expense, net	(147)	(182)	(50,281)
Total other expense, net	(803)	(182)	(50,281)
Net loss	$ (12,023)	$ (6,417)	$ (66,324)
Net loss per share:
Basic and diluted	$ (0.52)	$ (0.28)	$ (5.37)
Weighted-average common shares outstanding:
Basic and diluted	23,139,807	22,986,931	12,349,456

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	IPO [Member]	Common Stock 0.00001 Par Value [Member]	Common Stock 0.00001 Par Value [Member]IPO [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]IPO [Member]	Accumulated Deficit [Member]	Series C Convertible Preferred Stock 0.00001 Par Value [Member]	Series B Convertible Preferred Stock 0.00001 Par Value [Member]	Series A Convertible Preferred Stock 0.00001 Par Value [Member]
Beginning balance at Dec. 31, 2013	$ (61,966)				$ 270,794		$ (332,760)
Beginning balance, shares at Dec. 31, 2013			3,137					20,000	1,601,053	5,284,347
Net loss	(66,324)						(66,324)
Issuance of stock	3	$ 74,712			3	$ 74,712
Issuance of stock, shares			31	7,500,000
Stock compensation expense	8,781				8,781
Net cashless exercise of Series C warrants, shares								86,997,362
Conversion of convertible preferred stock to common stock, shares			115,982					(87,017,362)	(1,601,053)	(5,284,347)
Conversion of convertible debt to common stock	168,510				168,510
Conversion of convertible debt to common stock, shares			15,319,034
Issuance of Restricted Stock, shares			61,816
Forfeiture of Restricted Stock, shares			(7,727)
Ending balance at Dec. 31, 2014	123,716				522,800		(399,084)
Ending balance, shares at Dec. 31, 2014			22,992,273
Net loss	(6,417)						(6,417)
Stock compensation expense	5,413				5,413
Issuance of Restricted Stock, shares			132,130
Vesting of restricted stock units	(238)				(238)
Vesting of restricted stock units, shares			60,449
Ending balance at Dec. 31, 2015	122,474				527,975		(405,501)
Ending balance, shares at Dec. 31, 2015			23,184,852
Net loss	(12,023)						(12,023)
Stock compensation expense	5,313				5,313
Issuance of Restricted Stock, shares			75,152
Vesting of restricted stock units	(200)				(200)
Vesting of restricted stock units, shares			109,834
Ending balance at Dec. 31, 2016	$ 115,564				$ 533,088		$ (417,524)
Ending balance, shares at Dec. 31, 2016			23,369,838

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net loss	$ (12,023)	$ (6,417)	$ (66,324)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	9,853	9,887	10,183
Loss on disposal of assets			119
Financing and debt issuance costs	656		47
Accretion of debt to fair value			50,011
Stock compensation expense	5,313	5,413	8,781
Other		(139)	(31)
Changes in operating assets and liabilities:
Accounts receivable	3,089	(2,644)	838
Inventories	(6,336)	(1,635)	1,995
Prepaid expenses and other assets	(19)	(881)	(129)
Accounts payable	105	1,517	687
Accrued expenses	(2,178)	(227)	774
Deferred revenue	362	333	(303)
Other liabilities	600	152
Net cash (used in) provided by operating activities	(578)	5,359	6,648
Cash flows from investing activities:
Capital expenditures	(13,216)	(21,956)	(13,241)
Purchase of marketable securities		(2,500)
Maturity and sale of marketable securities		2,500
Net cash used in investing activities	(13,216)	(21,956)	(13,241)
Cash flows from financing activities:
Borrowings under line of credit			4,500
Repayments under line of credit			(5,500)
Repayment of borrowings under long-term debt			(18,849)
Financing costs	(656)		(47)
Proceeds from initial public offering			74,712
Repayment of obligations under capital lease	(68)	(80)	(80)
Payments made for employee restricted stock minimum tax withholdings	(200)	(238)
Proceeds from issuance of common stock			2
Net cash (used in) provided by financing activities	(924)	(318)	54,738
Net (decrease) increase in cash	(14,718)	(16,915)	48,145
Cash and cash equivalents at beginning of period	32,804	49,719	1,574
Cash and cash equivalents at end of period	18,086	32,804	49,719
Supplemental disclosures of cash flow information:
Interest paid	196	198	223
Income taxes paid	0	0	0
Supplemental disclosures of non-cash activities:
Conversion of convertible and senior convertible notes to common stock			168,510
Changes in accrued capital expenditures	$ 2,116	(5,332)	6,401
Capitalized interest			34
Capital lease		$ 21	$ 5

Description of Business

Description of Business	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Description of Business	(1) Description of Business Nature of Business Aspen Aerogels, Inc. (the Company) is an aerogel technology company that designs, develops and manufactures innovative, high-performance aerogel insulation used primarily in the energy infrastructure and building materials markets. The Company also conducts research and development related to aerogel technology supported by funding from several agencies of the U.S. government and other institutions in the form of research and development contracts. The Company maintains its corporate offices in Northborough, Massachusetts. The Company has three wholly owned subsidiaries: Aspen Aerogels Rhode Island, LLC, Aspen Aerogels Germany, GmbH and Aspen Aerogels Georgia, LLC . On June 18, 2014, the Company completed an initial public offering (IPO) of 7,500,000 shares of its common stock at a public offering price of $11.00 per share. The Company received net proceeds of $74.7 million after deducting underwriting discounts and commissions of $4.3 million and offering expenses of approximately $3.5 million. Upon the closing of the offering, all of the Company’s then-outstanding (i) warrants to purchase Series C preferred stock, (the “Series C warrants”) were subject to an automatic net cashless exercise, (ii) convertible preferred stock (including the shares of Series C preferred stock issued upon the automatic net cashless exercise of Series C warrants) automatically converted into 115,982 shares of common stock, and (iii) convertible notes automatically converted into 15,319,034 shares of common stock.

Summary of Basis of Presentatio

Summary of Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary of Basis of Presentation and Significant Accounting Policies	(2) Summary of Basis of Presentation and Significant Accounting Policies Principles of Consolidation The accompanying consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP), include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Use of Estimates The preparation of the consolidated financial statements requires the Company to make a number of estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates and assumptions include allowances for doubtful accounts, sales returns and allowances, product warranty costs, inventory valuation, the carrying amount of property and equipment, stock-based compensation and deferred income taxes. The Company evaluates its estimates and assumptions on an on-going basis using historical experience and other factors, including the current economic environment, which are believed to be reasonable under the circumstances. Management adjusts such estimates and assumptions when facts and circumstances dictate. Illiquid credit markets, volatile equity markets and declines in business investment increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in these estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods. Cash & Cash Equivalents Cash equivalents include short-term, highly liquid instruments, which consist of money market accounts. All cash and cash equivalents are maintained with major financial institutions in North America. Deposits with these financial institutions may exceed the amount of insurance provided on such deposits; however, these deposits typically may be redeemed upon demand and, therefore, bear minimal risk. Marketable Securities Marketable securities consisted primarily of marketable debt securities which are classified as available-for-sale and are carried at fair value. The Company held no marketable securities as of December 31, 2016 or 2015. During the year ended December 31, 2015, the Company purchased $2.5 million of marketable securities which matured during the same period. The unrealized gains and losses on available-for-sale securities are recorded in accumulated other comprehensive income (loss). The Company considers all highly liquid investments with maturities of 90 days or less at the time of purchase to be cash equivalents, and investments with maturities of greater than 90 days at the time of purchase to be marketable securities. When a marketable security incurs a significant unrealized loss for a sustained period of time, the Company will review the instrument to determine if it is other-than-temporarily impaired. If it is determined that an instrument is other-than-temporarily impaired, the Company will record the unrealized loss in the consolidated statement of operations. Accumulated Other Comprehensive Income (Loss) Accumulated other comprehensive income (loss) consisted of changes in the fair market value of available-for-sale securities. As of December 31, 2016 and 2015, the Company held no marketable securities. Fair Value of Financial Instruments Fair value is an exit price that represents the amount that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants. Accordingly, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. The Company discloses the manner in which fair value is determined for assets and liabilities based on a three-tiered fair value hierarchy. The hierarchy ranks the quality and reliability of the information used to determine the fair values. The three levels of inputs described in the standard are: Level 1: Quoted prices in active markets for identical assets or liabilities. Level 2: Observable inputs, other than Level 1 prices, for the assets or liabilities, either directly or indirectly, for substantially the full term of the assets or liabilities. Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Under the Fair Value Option Subsections of Financial Accounting Standards Board (FASB) ASC Subtopic 825-10, Financial Instruments — Overall At December 31, 2016 and 2015, no financial assets or liabilities were measured at fair value. During the year ended December 31, 2014 (prior to the completion of the Company’s IPO on June 18, 2014), the Company valued its then outstanding debt instruments utilizing Level 3 inputs. During the year ended December 31, 2015, the Company purchased $2.5 million of marketable securities which matured during the same period. During this period, the instruments were valued utilizing Level 1 inputs. As of December 31, 2016 and December 31, 2015, the Company held no marketable securities. Concentration of Credit Risk Financial instruments, which potentially expose the Company to concentrations of credit risk, consist principally of accounts receivable. The Company’s customers are primarily insulation distributors, insulation contractors, insulation fabricators and select end-users located throughout the world. The Company performs ongoing credit evaluations of its customers’ financial condition and generally requires no collateral to secure accounts receivable. The Company maintains an allowance for doubtful accounts based on its assessment of the collectability of accounts receivable. The Company reviews the allowance for doubtful accounts quarterly. The Company has not experienced any meaningful non-payment or write-offs of accounts receivable. Accordingly, the allowance for doubtful accounts was zero at December 31, 2016 and 2015. The Company does not have any off-balance-sheet credit exposure related to its customers. For the year ended December 31, 2016, two customers represented 25% and 15% of total revenue, respectively. For the year ended December 31, 2015, two customers represented 14% and 12% of total revenue, respectively. For the year ended December 31, 2014, two customers represented 13% and 12% of total revenue, respectively. At December 31, 2016, the Company had three customers that accounted for 31%, 17% and 10% of accounts receivable, respectively. At December 31, 2015, the Company had three customers that accounted for 17%, 14% and 13% of accounts receivable, respectively. Inventories Inventory consists of finished products and raw materials. Inventories are carried at lower of cost, determined using the first-in, first-out (FIFO) method, or market. Cost includes materials, labor and manufacturing overhead. Manufacturing overhead is allocated to the costs of conversion based on normal capacity of the Company’s production facility. Abnormal freight, handling costs and material waste is expensed in the period it occurs. The Company periodically reviews its inventories and makes provisions as necessary for estimated excess, obsolete or damaged goods to ensure values approximate the lower of cost or market. The amount of any such provision is equal to the difference between the cost of inventory and the estimated market value based upon assumptions about future demand, selling prices and market conditions. Property, Plant and Equipment, Net Property, plant and equipment are stated at cost. Assets held under capital leases are stated at the lesser of the present value of future minimum payments, using the Company’s incremental borrowing rate, or the fair value of the property at the inception of the lease. Expenditures for maintenance and repairs are charged to expense as incurred, whereas major betterments are capitalized as additions to property, plant and equipment. Interest expense capitalization commences at the time a capital project begins construction and concludes when the project is completed. The Company has capitalized interest costs as part of the historical cost of constructing its manufacturing facilities. The Company capitalized $0.0 million, $0.0 million and $0.1 million in interest costs related to the build-out of the East Providence facility during the years ended December 31, 2016, 2015 and 2014, respectively. Depreciation on plant and equipment is calculated on the straight-line method over the estimated useful lives of the assets. Assets related to capital leases are amortized on a straight-line basis over the shorter of the lease term or estimated useful life of the asset. Assets utilized in the Company’s operations that are taken out of service with no future use are charged to cost of sales or operating expenses, depending on the department in which the asset was utilized. Write-offs of construction in progress are charged to operating expenses upon the determination of no future use. Other Assets Other assets primarily include long-term deposits. Impairment of Long-Lived Assets Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. Recognition and measurement of a potential impairment is performed on assets grouped with other assets and liabilities at the lowest level where identifiable cash flows are largely independent of the cash flows of other assets and liabilities. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset or asset group to future undiscounted net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset or asset group exceeds its estimated undiscounted future cash flows, an impairment charge is recognized for the amount by which the carrying amount of the asset or asset group exceeds the fair value of the asset or asset group. Fair value is determined through various valuation techniques including discounted cash flow models, quoted market values and third-party independent appraisals, as considered necessary. Asset Retirement Obligations The Company records asset retirement obligations associated with its lease obligations and the retirement of tangible long-lived assets. The Company reviews legal obligations associated with the retirement of long-lived assets that result from contractual obligations or the acquisition, construction, development and/or normal use of the assets. If it is determined that a legal obligation exists, regardless of whether the obligation is conditional on a future event, the fair value of the liability for an asset retirement obligation is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. An amount equal to the fair value of the liability is also recorded as a long-term asset that is depreciated over the estimated life of the asset. The difference between the gross expected future cash outflow and its present value is accreted over the life of the related lease as an operating expense. The Company fully satisfied its asset retirement obligation during the year ended December 31, 2016. Deferred Revenue The Company records deferred revenue for product sales when (i) the Company has delivered products but other revenue recognition criteria have not been satisfied, (ii) payments have been received in advance of products being delivered, or (iii) subject to customer rebate agreements. Deferred Rent For leases that contain fixed increases in the minimum annual lease payment during the original term of the lease, the Company recognizes rental expense on a straight-line basis over the lease term, and records the difference between rent expense and the amount currently payable as deferred rent. Lease incentives for allowances for qualified leasehold improvements received from landlords are amortized on a straight-line basis over the lease term. Deferred rent is included in other long-term liabilities on the consolidated balance sheet. Revenue Recognition The Company recognizes revenue from the sale of products and performance of research and development services. Revenue is recognized when all of the following criteria are met: persuasive evidence of an arrangement exists, the price to the buyer is fixed or determinable, delivery has occurred or services have been provided, and collectability is reasonably assured. Product Revenue Product revenue is recognized upon transfer of title and risk of loss, which is upon shipment or delivery. The Company’s customary shipping terms are free on board shipping point. Sales returns are recorded based on historical sales and return information. Products that exhibit unusual sales return patterns due to quality or other manufacturing matters are specifically investigated and analyzed as part of the sales return accrual. The sales return accrual represents a reserve for products that may be returned due to quality concerns or authorized for destruction in the field. Sales return reserves are recorded at full original sales value. The Company rarely exchanges products from inventory for returned products. Sales return reserves were $0.1 million at December 31, 2016 and 2015. For initial shipments of products where the Company is unsure of meeting the customer’s specifications, the Company will defer the recognition of product revenue and related costs until written customer acceptance is obtained. Research Services Revenue The Company performs research services under contracts with various government agencies and other institutions. The Company records revenue earned on research services contracts using the percentage-of-completion method in two ways: (1) for firm-fixed-price contracts, the Company accrues that portion of the total contract price that is allocable, on the basis of the Company’s estimates of costs incurred to date to total contract costs; and (2) for cost-plus-fixed-fee contracts, the Company records revenue that is equal to total payroll cost incurred times a stated factor plus reimbursable expenses, to a stated upper limit. The primary cost is the labor effort expended in completing research, and the only deliverable, other than the labor hours expended, is reporting of research results to the customer. Because the input measure of labor hours expended is also reflective of the output measure, it is a reliable means to measure the extent of progress towards completion. Revisions in cost estimates and fees during the course of the contract are reflected in the accounting period in which the facts that require the revisions become known. Contract costs and rates used to allocate overhead to contracts are subject to audit by the respective contracting government agency. Adjustments to revenue as a result of audit are recorded in the period they become known. To date, adjustments to revenue as a result of audit have been insignificant. Warranty The Company provides warranties for its products and records the estimated cost within cost of sales in the period that the related revenue is recorded. The Company’s standard warranty period extends to one to two years from the date of shipment. The standard warranties provide that the Company’s products will be free from defects in material and workmanship, and will, under normal use, conform to the specifications for the product. Historically, warranty claims and charges have been insignificant. The Company’s products may be utilized in systems that may involve new technical demands and new configurations. As such, the Company regularly reviews and assesses whether warranty reserves shall be recorded in the period the related revenue is recorded. For the year ended December 31, 2016, the Company recorded warranty expense of $0.5 million. This specific reserve was principally related to product warranty claims for specific projects. These claims were outside of the Company’s typical experience. As of December 31, 2016, the Company had satisfied all outstanding warranty claims. Additionally, during the year ended December 31, 2016, a customer notified the Company of a specific product application issue. The customer continues to request and receive shipment of additional aerogel product and no claim has been made. The Company cannot be certain that it will not be subject to a future warranty claim. Shipping and Handling Costs Shipping and handling costs are classified as a component of cost of revenue. Customer payments of shipping and handling costs are recorded as product revenue. Stock-based Compensation The Company grants share-based awards to its employees and non-employee directors. All share-based awards granted, including grants of stock options, restricted stock and restricted stock units (RSUs), are recognized in the statement of operations based on their fair value as of the date of grant. Expense is recognized on a straight-line basis over the requisite service period for all awards with service conditions. For performance-based awards, the grant date fair value is recognized as expense when the condition is probable of being achieved, and then on a graded basis over the requisite service period. The Company uses the Black-Scholes option-pricing model to determine the fair value of service-based option awards, which requires a number of complex and subjective assumptions including fair value of the underlying security, the expected volatility of the underlying security, a risk-free interest rate and the expected term of the option. The fair value of restricted stock and RSUs is determined using the closing price of the Company’s common stock on the date of grant. All shares of restricted stock are not transferable until they vest. Restricted stock is typically issued to non-employee directors and typically vests over a one-year period from the date of issuance. RSUs are issued to employees and typically vest over a three to four year period from the date of issuance. The fair value of restricted stock and RSUs upon which vesting is solely service-based is expensed ratably over the vesting period. If the service condition underlying shares of restricted stock is not met for any reason, the shares of unvested restricted stock will be forfeited and returned to the Company. For stock options that contain a market condition, the Company uses the Monte-Carlo simulation option-pricing model to determine the fair value of market based awards. The Monte-Carlo simulation option-pricing model takes into account the same input assumptions as the Black-Scholes model; however, it also further incorporates into the fair-value determination, the possibility that the market condition may not be satisfied. Compensation costs related to awards with a market condition are recognized regardless of whether the market condition is satisfied, provided that the requisite service has been provided. Stock-based compensation expense is recognized on a straight-line basis over the requisite service period for each such award. Pursuant to the evergreen provisions of the 2014 Employee, Director and Consultant Equity Incentive Plan, the number of shares of common stock authorized for issuance under the plan automatically increased by 463,697 shares to 6,069,201 shares effective January 1, 2016. Research and Development Costs incurred in the research and development of the Company’s products include compensation and related costs, services provided by third-party contractors, materials and supplies and are classified as research and development expenses as incurred. Research and development costs directly associated with research services revenue are classified as research services in cost of revenue. Earnings per Share The Company calculates net income (loss) per common share based on the weighted-average number of common shares outstanding during each period. Potential common stock equivalents are determined using the treasury stock method. The weighted-average number of common shares included in the computation of diluted net income (loss) gives effect to all potentially dilutive common equivalent shares, including outstanding stock options, RSUs and warrants. Common equivalent shares are excluded from the computation of diluted net income (loss) per share if their effect is antidilutive. Diluted net income (loss) per share is computed using the more dilutive of (a) the two-class method, or (b) the if-converted method. The Company allocates net income (loss) first to preferred stockholders and holders of warrants to purchase preferred stock based on dividend rights and then to common stockholders, preferred stockholders and preferred warrant holders based on ownership interests. The weighted-average number of common shares included in the computation of diluted net income (loss) gives effect to all potentially dilutive common equivalent shares, including outstanding stock options, RSUs and warrants. Common equivalent shares are excluded from the computation of diluted net income (loss) per share if their effect is antidilutive. Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. The Company accounts for uncertain tax positions using a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Differences between tax positions taken in a tax return and amounts recognized in the financial statements are recorded as adjustments to income taxes payable or receivable, or adjustments to deferred taxes, or both. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company recognizes penalties and interest related to uncertain tax positions, if any, as a component of income tax expense. Segments Operating segments are identified as components of an enterprise about which separate, discrete financial information is available for evaluation by the chief operating decision maker in making decisions on how to allocate resources and assess performance. The Company’s chief operating decision maker is the Chief Executive Officer. The Company’s chief operating decision maker reviews consolidated operating results to make decisions about allocating resources and assessing performance for the entire Company. The Company views its operations and manages its business as one operating segment. Information about the Company’s revenues, based on shipment destination or research services location, is presented in the following table: Year Ended December 31, 2016 2015 2014 (In thousands) Revenue: U.S. $ 35,726 $ 44,553 $ 39,809 International 82,012 77,965 62,590 Total $ 117,738 $ 122,518 $ 102,399 Recently Issued Accounting Standards In August 2016, the (FASB) issued Accounting Standards Update (ASU) No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (FASB ASU 2016-15). This amendment addresses eight classification issues related to the statement of cash flows. For public business entities, the amendments in FASB ASU 2016-15 are effective for public business entities for annual and interim periods in fiscal years beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. The Company has not yet selected a transition method and is evaluating the effect the updated standard will have on its consolidated financial statements and related disclosures. In March 2016, the FASB issued FASB ASU No. 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (FASB ASU 2016-09). The amendment is to simplify several aspects of the accounting for share-based payment transactions including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. For public entities, the amendments in FASB ASU 2016-09 are effective for interim and annual reporting periods beginning after December 15, 2016. The Company has determined that the adoption of this standard will not have a material impact on its consolidated results of operations and financial condition. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In November 2015, the FASB issued ASU 2015-17, Income Taxes: Balance Sheet Classification of Deferred Taxes In August 2015, the FASB issued a deferral of ASU 2014-09, Revenue from Contracts with Customers The Company has not yet selected a transition method and is evaluating the effect that the updated standard will have on its consolidated financial statements and related disclosures. In July 2015, the FASB issued ASU 2015-11, which, for entities that do not measure inventory using the last-in, first-out (LIFO) or retail inventory method, changes the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value. The ASU also eliminates the requirement for these entities to consider replacement cost or net realizable value less an approximately normal profit margin when measuring inventory. Public entities are required to apply the new standard for annual reporting periods beginning after December 15, 2016 and interim periods within those fiscal periods. This standard is to be applied prospectively. Early adoption is permitted as of the beginning of an interim or annual period. The Company does not expect the adoption of this standard to have a material impact on its consolidated financial statements and related disclosures. From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies and adopted by the Company as of the specified effective date. Unless otherwise discussed, the Company believes that the impact of recently issued standards that are not yet effective will not have a material impact on its financial position or results of operations upon adoption.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Inventories	(3) Inventories Inventories consist of the following: December 31, 2016 2015 (In thousands) Raw material $ 3,511 $ 4,432 Finished goods 9,357 2,100 Total $ 12,868 $ 6,532

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Property, Plant and Equipment, Net	(4) Property, Plant and Equipment, Net Property, plant and equipment consist of the following: December 31, 2016 2015 Useful life (In thousands) Construction in progress $ 11,139 $ 5,138 — Buildings 23,901 23,884 30 years Machinery and equipment 113,659 104,658 3 — 10 years Computer equipment and software 7,679 6,888 3 years Total 156,378 140,568 Accumulated depreciation and amortization (71,984 ) (62,246 ) Property, plant and equipment, net $ 84,394 $ 78,322 Plant and equipment under capital leases included in the table above was $0.1 million at both December 31, 2016 and 2015. Depreciation expense was $9.8 million, $9.8 million and $10.1 million for the years ended December 31, 2016, 2015 and 2014, respectively. Amortization associated with assets under capital leases was less than $0.1 million for each of the years ended December 31, 2016, 2015 and 2014. Construction in progress totaled $11.1 million and $5.1 million at December 31, 2016 and 2015, respectively. Construction in progress at December 31, 2016 included engineering designs and other pre-construction costs for our planned manufacturing facility in Statesboro, Georgia of $7.2 million and other capital improvement projects at the East Providence facility. Construction in process at December 31, 2015 included engineering designs and other pre-construction costs for our planned manufacturing facility in Statesboro, Georgia of $2.3 million and other capital improvement projects at the East Providence facility.

Accrued Expenses

Accrued Expenses	12 Months Ended
	Dec. 31, 2016
Payables And Accruals [Abstract]
Accrued Expenses	(5) Accrued Expenses Accrued expenses consist of the following: December 31, 2016 2015 (In thousands) Employee compensation $ 2,796 $ 4,184 Other accrued expenses 1,191 1,384 $ 3,987 $ 5,568

Revolving Line of Credit

Revolving Line of Credit	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Revolving Line of Credit	(6) Revolving Line of Credit The Company entered into an Amended and Restated Loan and Security Agreement with Silicon Valley Bank (Loan Agreement), on August 31, 2014, which has been subsequently amended from time to time. On January 27, 2017, the Loan Agreement was amended to extend the maturity date of the facility to January 28, 2018. Under the Loan Agreement, the Company may borrow up to $20 million subject to compliance with certain covenants and borrowing base limitations. At the Company’s election, the interest rate applicable to borrowings may be based on the prime rate or LIBOR. Prime rate-based rates vary from prime rate plus 0.75% per annum to prime rate plus 1.75% per annum, while LIBOR-based rates vary from LIBOR plus 3.75% per annum to LIBOR plus 4.25% per annum. In addition, the Company is required to pay a monthly unused line fee of 0.5% per annum of the average unused portion of the facility. Obligations under the Loan Agreement are secured by a first priority security interest in all assets of the Company, including those at the East Providence facility, except for certain exclusions. At December 31, 2016 and 2015, the Company had no amounts drawn under the Loan Agreement. Under the Loan Agreement, the Company is required to comply with both non-financial and financial covenants, including minimum Adjusted EBITDA and minimum Adjusted Quick Ratio, as defined. At December 31, 2016, the Company was in compliance with all such covenants. The Company has been required to provide its landlord with letters of credit securing certain obligations. In addition, the Company has been required to provide certain customers with letters of credit securing obligations under commercial contracts. The Company had outstanding letters of credit backed by the revolving credit facility of $2.7 million at December 31, 2016 and 2015, which reduce the funds otherwise available to the Company under the Loan Agreement. Based on the available borrowing base and net of the $2.7 million of outstanding letters of credit, the amount available to the Company under the Loan Agreement at December 31, 2016 was $12.1 million.

Other Expense, Net

Other Expense, Net	12 Months Ended
	Dec. 31, 2016
Other Expense Disclosure Nonoperating [Abstract]
Other Expense, Net	(7) Other Expense, net For the year ended December 31, 2016, other expense, net of $0.8 million consisted of financing costs and interest expense. During the year, the Company engaged with a third party lender to secure a term loan to fund, in part, the construction of the planned manufacturing facility in Statesboro, Georgia. In 2016, the Company decided, at its sole discretion, to temporarily delay construction of the facility and its related financing to better align the capacity expansion with the Company’s assessment of demand for the 2018 to 2020 period. As a result, the Company recorded a $0.7 million charge for postponed financing costs. The charge included legal fees incurred by the Company itself and on behalf of the potential lender. In addition, the Company recognized interest expense of $0.1 million of commitment and legal fees associated with its Loan Agreement with Silicon Valley Bank. For the year ended December 31, 2015, other expense, net consisted primarily of commitment and legal fees associated with the Loan Agreement of $0.2 million. For the year ended December 31, 2014, the Company held debt instruments outstanding that were measured at fair value. The charge recognized as a result of the change in fair value of the debt instruments was $50.0 million for the year ended December 31, 2014. In addition, the Company incurred an aggregate of $0.3 million in interest expense associated with the Loan Agreement and for debt closing costs during the year.

Other Long-term Liabilities

Other Long-term Liabilities	12 Months Ended
	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Other Long-term Liabilities	(8) Other Long-term Liabilities Other long-term liabilities consist of the following: December 31, 2016 2015 (In thousands) Asset retirement obligations (ARO) $ — $ 397 Deferred rent 1,125 163 1,125 560 Current maturities of other long-term liabilities (154 ) (409 ) Other long-term liabilities, less current maturities $ 971 $ 151 As of December 31, 2015, the Company had asset retirement obligations (ARO) of $0.4 million arising from requirements to perform certain asset retirement activities upon the termination of its Northborough, Massachusetts facility lease and upon disposal of certain machinery and equipment. A summary of ARO activity consists of the following: Year Ended December 31, 2016 2015 (In thousands) Balance at beginning of period $ 397 $ 1,018 Accretion of discount expense — 21 Settlement costs (397 ) (642 ) Balance at end of period $ — $ 397 During the year ended December 31, 2016, the Company incurred approximately $0.2 million in expenditures in support of completing the restoration of space under the facility lease. This space was vacated and returned to the landlord on July 1, 2016. On June 29, 2016, the Company executed an agreement to remain at the Northborough, Massachusetts facility through December 31, 2026. As part of the new agreement, the Company’s obligation to restore the remaining space in the Northborough facility was eliminated. The settlement of the remaining reserve balance of approximately $0.2 million was reclassified to other long-term liabilities and will be amortized as a reduction to rent expense over the term of the new lease agreement.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	(9) Commitments and Contingencies Capital Leases The Company has entered into certain capital leases for computer equipment and vehicles. The leases are payable in monthly installments and expire at various dates through 2018. The recorded balance of capital lease obligations as of December 31, 2016 and 2015 was $0.1 million and less than $0.1 million, respectively. Future minimum payments under capital leases at December 31, 2016 are as follows: Year Capital Lease Obligations (In thousands) 2017 $ 37 2018 5 Total 42 Less portion representing interest (3 ) Present value of future minimum payments 39 Current maturities of capital lease payments (35 ) Capital leases, excluding current portion $ 4 Operating Leases On June 29, 2016, the Company entered into a new agreement to lease approximately 51,650 square feet of office space in Northborough, MA, the location of the Company’s current headquarters. The new lease succeeds the existing lease between the Company and the landlord that expires on December 31, 2016. The lease term commences on January 1, 2017 and expires on December 31, 2026. The annual base rent associated with the lease will be approximately $408,000 during the first year of the lease, and increase by approximately 3% annually for the term of the lease. The lease also provides for the payment by the Company of its pro rata share of real estate taxes and certain other expenses. Prior to the expiration of the lease term, the Company will have the right to extend the lease for an additional term of three years. Under the terms of the new lease, the landlord will provide the Company with an allowance of up to $1.2 million to be utilized for improvements to the leased premises. These amounts are recorded as a component of deferred rent in determining the minimum lease payments for the property. As of December 31, 2016, the Company had capitalized $0.7 million in leasehold improvement costs. The Company also leases facilities and equipment under operating leases expiring at various dates through 2021. Under these agreements, the Company is obligated to pay annual rentals, as noted below, plus real estate taxes, and certain operating expenses. Future minimum lease payments under operating leases at December 31, 2016 are as follows: Year Operating Leases (In thousands) 2017 $ 1,222 2018 1,239 2019 813 2020 640 2021 505 Thereafter 2,512 Total minimum lease payments $ 6,931 The Company incurred rent expense under all operating leases of approximately $1.5 million, $1.6 million and $1.2 million in the years ended December 31, 2016, 2015 and 2014, respectively. Letters of Credit The Company has been required to provide certain customers with letters of credit securing obligations under commercial contracts. The Company had letters of credit outstanding for $2.7 million at both December 31, 2016 and 2015, respectively. These letters of credit are secured by the Company’s revolving credit facility (see note 6). Customer Supply Agreement During 2016, the Company entered into a supply agreement (the Supply Agreement) and a joint development agreement (the JDA) with BASF SE (BASF). Pursuant to the Supply Agreement, the Company will sell exclusively to BASF the Company’s Spaceloft ® A2 product at annual volumes to be specified by BASF, subject to certain volume limits. The Supply Agreement will terminate on December 31, 2027. Upon expiration of the Supply Agreement, the Company will be subject to a post-termination supply commitment for an additional two years. The JDA is designed to facilitate the collaboration between the parties on the development and commercialization of new products. In addition, BASF will make a non-interest bearing prepayment to the Company in the aggregate amount of $22 million during the construction of the Company’s planned manufacturing facility in Statesboro, Georgia (Plant Two), subject to the Company’s prior satisfaction of certain preconditions, including securing a debt commitment from a third party lender for at least $30 million. BASF is obligated to pay the prepayment to the Company in eight equal consecutive quarterly installments commencing on the first day of the calendar quarter following the date on which the preconditions are met. Once commenced, BASF’s obligation to make such quarterly payments shall be subject to postponement in the event of delays of three months or more in the projected date of completion of Plant Two by a commensurate number of months. After October 1, 2018, the Company will, at BASF’s instruction, credit up to 25.3% of any amounts invoiced by the Company for Spaceloft ® A2 product sold to BASF against the prepayment balance. However, BASF has no obligation to purchase products under the Supply Agreement. If any of the prepayment remains uncredited against amounts invoiced by the Company as of September 30, 2023, BASF may request that the Company repay the uncredited amount to BASF in four equal quarterly installments beginning on December 31, 2023. The repayment obligation will be secured by a security interest in real estate, plant and equipment at the Company’s Rhode Island and Georgia manufacturing facilities. As of December 31, 2016, the Company anticipates that the impact of constrained capital investment and low activity levels in the global energy markets will continue into 2017. With this view of the market, the Company has elected to temporarily delay the board approved Plant Two project and its related financing to better align the capacity expansion with the Company’s assessment of demand for the 2018 to 2020 period. As a result, the Company has yet to fulfill the prepayment preconditions and commencement of the quarterly prepayments from BASF will be delayed until the preconditions are satisfied. Litigation The Company is, from time to time, a party to litigation that arises in the normal course of its business operations. See Part I, Item 3 (“Legal Proceedings”) of this Annual Report on Form 10-K for a description of certain of the Company’s current legal proceedings. The Company is not presently a party to any litigation for which it believes a loss is probable requiring an amount to be accrued or a possible loss contingency requiring disclosure.

Conversion of Redeemable Conver

Conversion of Redeemable Convertible Preferred Stock	12 Months Ended
	Dec. 31, 2016
Text Block [Abstract]
Conversion of Redeemable Convertible Preferred Stock	(10) Conversion of Redeemable Convertible Preferred Stock Upon the closing of the Company’s IPO discussed in note 1, the outstanding shares of Series A, Series B and Series C convertible preferred stock converted into 115,982 shares of common stock.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Stockholders' Equity	(11) Stockholders’ Equity On June 18, 2014, the Company completed an IPO of 7,500,000 shares of its common stock at a public offering price of $11.00 per share. The Company received net proceeds of $74.7 million after deducting underwriting discounts and commissions of $4.3 million and other offering expenses of approximately $3.5 million. Upon the closing of the offering, all of the Company’s then-outstanding (i) Series C warrants to purchase Series C preferred stock were subject to an automatic net cashless exercise, (ii) convertible preferred stock (including the shares of Series C preferred stock issued upon the automatic net cashless exercise of Series C warrants) automatically converted into 115,982 shares of common stock, and (iii) Convertible Notes and Senior Convertible Notes automatically converted into 15,319,034 shares of common stock. At December 31, 2016 and 2015, the Company was authorized to issue 130,000,000 shares of stock, of which 125,000,000 shares were designated as common stock and 5,000,000 shares were designated as preferred stock.

Employee Benefit Plan

Employee Benefit Plan	12 Months Ended
	Dec. 31, 2016
Postemployment Benefits [Abstract]
Employee Benefit Plan	(12) Employee Benefit Plan The Company sponsors the Aspen Aerogels, Inc. 401(k) Plan. Under the terms of the plan, the Company’s employees may contribute a percentage of their pretax earnings. During the years ended December 31, 2016 and 2015, the Company provided matching contributions of $0.2 million and $0.1 million, respectively. During the year ended December 31, 2014, the Company did not provided matching contributions nor did it make any contributions to the plan.

Employee Stock Ownership Plans

Employee Stock Ownership Plans	12 Months Ended
	Dec. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Employee Stock Ownership Plans	(13) Employee Stock Ownership Plans Effective June 12, 2014, upon the pricing of the IPO, the Company adopted the 2014 Employee, Director and Consultant Equity Incentive Plan (the 2014 Equity Plan). Under the 2014 Equity Plan, the Company may grant incentive stock options, non-qualified stock options, restricted stock, RSUs and other stock-based awards. Stock options under the plan are to be granted with an exercise price not less than the fair market value of the Company’s common stock at the date of grant. Equity awards granted to employees generally vest over a service period of three to four years. Restricted stock granted to nonemployee directors vests over a one year service period. During 2016, the Company issued 75,152 shares of restricted common stock and 103,593 non-qualified stock options (NSOs) to its nonemployee directors with a fair value of $0.4 million and $0.2 million, respectively, vesting over a one year period. The Company also issued 429,803 RSUs and NSOs to purchase 278,440 shares of common stock to employees. The RSUs and NSOs granted to employees during 2016 will vest over a three year period. All awards to nonemployee directors and employees during 2016 were granted under the 2014 Equity Plan. On December 11, 2015, the Company issued certain equity grants to its chief executive officer which included 78,125 shares of restricted stock, NSOs to purchase 84,745 shares of common stock vesting solely over three years and NSOs to purchase 370,181 shares of common stock vesting subject to certain common stock price target achievements, as defined, over a three to five year period (the CEO Options). Collectively, these equity grants had an aggregate fair value of $2.0 million at the time of grant. The restricted stock award will vest based on achievement of a Company financial performance target for fiscal year 2020. Stock-based compensation is included in cost of sales or operating expenses, as applicable, and consists of the following: Year Ended December 31, 2016 2015 2014 (In thousands) Cost of product revenue $ 796 $ 824 $ 1,121 Research and development expenses 594 666 1,046 Sales and marketing expenses 1,066 1,012 1,390 General and administrative expenses 2,857 2,911 5,224 Total stock-based compensation $ 5,313 $ 5,413 $ 8,781 At December 31, 2016, 2,652,658 shares of common stock were reserved for outstanding stock-based awards granted under the 2014 Equity Plan. In addition, at December 31, 2016, 92,987 shares of common stock were reserved for stock-based awards granted under the Company’s 2001 Equity Incentive Plan, which was replaced by the 2014 Equity Plan. Any cancellations or forfeitures of these awards will become available for future grant under the 2014 Equity Plan. At December 31, 2016, there were 2,817,106 shares available for future grant under the 2014 Equity Plan. Stock Options Valuation and Amortization Method Prior to the IPO, the Board of Directors had historically determined the fair value of the Company’s common stock based on the market approach and the income approach to estimate the enterprise value of the business under various liquidity event scenarios, including an IPO by the Company and the sale of the Company. To support the valuations, the Company utilized a probability-weighted expected return under those various liquidity scenarios, public guideline companies, management cash flow projections and other assumptions to derive the enterprise value of the business. The Company then derived the estimated fair value of each class of stock, taking into consideration the rights and preferences of each instrument based on a probability-weighted expected return. The fair value of each stock option is estimated as of the date of grant using the Black-Scholes option pricing model. Key inputs into this formula included expected term, expected volatility, expected dividend yield and the risk-free rate. Each assumption is set forth and discussed below. For the performance-based stock options issued during the year ended December 31, 2013, the Company used a Monte Carlo simulation model to estimate the number of options expected to remain outstanding and eligible for vesting upon completion of the Company’s IPO. The simulation model was based on a number of complex assumptions including the terms of the performance condition, the value of our common stock at the time of the Company’s IPO, the expected time from the date of grant to the Company’s IPO and expected volatility. The number of options expected to remain outstanding and eligible for vesting upon completion of the Company’s IPO was estimated to be 96.8% and 97.4% of the options granted at August 7, 2013 and December 20, 2013, respectively. The fair value of each performance-based stock option was determined by multiplying the Black-Scholes estimate of grant date fair value by the percentage of options expected to remain outstanding and eligible for vesting upon completion of the Company’s IPO. In December 2015, the Company issued NSOs to its chief executive officer to purchase 370,181 shares of common stock which are subject to the achievement of certain common stock price targets and may become exercisable on the third, fourth and fifth anniversary of the grant date. The Company used a Monte Carlo Simulation model to estimate the grant date fair value of awards expected to vest. The simulation model was based on a number of complex assumptions including (i) if the vesting condition is satisfied within the time-vesting periods, and (ii) the date the common stock price target is met per the terms of the agreement. For stock options with a service condition, the fair value is amortized on a straight-line basis over the requisite service period of the options, which is generally a three- to four-year vesting period from the date of grant. For the performance-based stock options issued during the year ended December 31, 2013, a portion of the fair value was recognized as expense when the IPO performance condition was achieved and the remainder over the requisite service period, which is generally a three- to four-year vesting period from the date of grant. Expected Term The expected term represents the period that the Company’s stock-based awards are expected to be outstanding. The Company uses the simplified method as prescribed by FASB ASC 718 to calculate the expected term for options granted, as it does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate the expected term. Expected Volatility Due to the Company’s limited historical data, the estimated volatility reflects the incorporation of the historical volatility of comparable companies with publicly available share prices. In 2016, 2015 and 2014, the expected volatility is based on the weighted average volatility of up to 15 companies with business, financial and market attributes that the Company believes are similar to its own. Expected Dividend The Company uses an expected dividend yield of zero. The Company does not intend to pay cash dividends on its common stock in the foreseeable future, nor has it paid dividends on its common stock in the past. Risk-free Interest Rate The risk-free interest rate is based on U.S. Treasury zero-coupon issues with a remaining term equal to the expected life assumed at the date of grant. Estimated Forfeitures Forfeitures are required to be estimated at the time of grant and revised, if necessary, in subsequent periods, if actual forfeitures differ from those estimates. Forfeitures are estimated based on voluntary termination behavior as well as analysis of actual option forfeitures. Accordingly, share-based compensation expense has been reduced by an estimated annual forfeiture rate for the years ended December 31, 2016, 2015 and 2014. Assumptions Utilized The following information relates to the fair value of the option awards estimated by use of the Black-Scholes option pricing model: Year Ended December 31, 2016 2015 2014 (In thousands) Weighted average assumptions: Expected term (in years) 5.86 6.02 6.17 Expected volatility 53.56 % 57.95 % 50.09 % Risk free rate 1.36 % 1.79 % 1.94 % Expected dividend yield 0.00 % 0.00 % 0.00 % Weighted average fair value: Grant-date fair value of options granted $ 2.16 $ 3.82 $ 5.37 Grant-date fair value of options vested $ 7.58 $ 11.89 $ 97.33 Aggregate intrinsic value of options exercised $ — $ — $ 4,816.50 Outstanding Options The following table summarizes information about stock options outstanding: Number of Shares Weighted Average Grant Date Fair Value Per Share Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value ($ in thousands, except share and per share data) Options outstanding at December 31, 2015 1,702,337 $ 9.60 $ 13.47 9.08 $ 6,152 Granted 382,033 $ 2.16 $ 4.30 Forfeited (20,796 ) $ 6.62 $ 10.58 Exercised — $ — $ — $ — Options outstanding at December 31, 2016 2,063,574 $ 8.26 $ 11.80 8.30 $ 36,326 Exercisable at December 31, 2016 707,260 $ 17.10 $ 19.81 7.68 $ — Expected to vest at December 31, 2016 1,190,710 $ 3.58 $ 6.99 8.67 $ 31,473 As of December 31, 2016, total unrecognized compensation cost related to nonvested options granted under the 2014 Equity Plan was $3.0 million. The unrecognized compensation cost consisted of $3.0 million relating to service-based awards and less than $0.1 million to performance-based awards. The unrecognized compensation cost for the service-based options and performance-based awards is expected to be recognized over a weighted average period of 1.97 and 0.97 years, respectively. Restricted Stock Awards and Restricted Stock Units The Company values restricted stock awards and RSUs based on the closing trading value of our shares on the date of grant. RSUs have time-based vesting conditions and typically vest pro rata over three or four years. Restricted stock awards issued to nonemployee directors generally vest in full one year from the date of grant. Information related to grants of RSUs during 2016 is as follows: Restricted Stock Units Weighted Average Grant Date Fair Value Balance at December 31, 2015 417,126 $ 9.01 Granted 429,803 4.04 Vested (155,707 ) 9.20 Forfeited (9,137 ) 9.37 Balance at December 31, 2016 682,085 $ 5.83 Restricted stock awards granted during 2016 are considered issued and outstanding common stock and are excluded from the table above. As of December 31, 2016 there were 153,277 shares of restricted stock outstanding. The total intrinsic values of restricted stock and RSUs that vested in 2016 and 2015 was $0.6 million and $0.5 million, respectively. No restricted stock or RSUs vested in 2014. As of December 31, 2016, of the total shares of restricted stock and RSUs outstanding, 757,147 will vest upon the fulfillment of service conditions. In addition, 78,125 shares of restricted stock will vest only if certain performance conditions are achieved. As of December 31, 2016, the Company has determined that the performance-based condition was not probable, and no compensation has been recorded to date in conjunction with the award. As of December 31, 2016, total unrecognized compensation cost related to restricted stock awards and RSUs granted under the 2014 Equity Plan was $0.2 million and $2.3 million, respectively, and is expected to be recognized over a weighted average period of 0.48 and 1.67 years, respectively.

Net Loss Per Share

Net Loss Per Share	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Net Loss Per Share	(14) Net Loss Per Share The computation of basic and diluted net income (loss) per share consists of the following: Year ended December 31, 2016 2015 2014 (In thousands, except share and per share data) Numerator: Net loss $ (12,023 ) $ (6,417 ) $ (66,324 ) Denominator: Weighted average shares outstanding, basic and diluted 23,139,807 22,986,931 12,349,456 Net loss per share, basic and diluted $ (0.52 ) $ (0.28 ) $ (5.37 ) Potential dilutive common shares that were excluded from the computation of diluted net loss per share because they were anti-dilutive consist of the following: Year ended December 31, 2016 2015 2014 Common stock options 2,063,574 1,702,337 1,026,510 Restricted common stock units 682,085 417,126 314,640 Common stock warrants 115 131 131 Restricted common stock awards 153,277 132,130 — Total 2,899,051 2,251,724 1,341,281 As of December 31, 2016 and 2015, there was no dilutive impact of the common stock options, RSUs, common stock warrants and restricted stock awards. All other potentially dilutive instruments were converted into shares of common stock upon the closing of the Company’s IPO on June 18, 2014.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	(15) Income Taxes The Company incurred net operating losses and recorded a full valuation allowance against net deferred assets for all periods presented. Accordingly, the Company has not recorded a provision for federal or state income taxes. The reconciliation between the U.S. statutory income tax rate and the Company’s effective rate consists of the following: Year Ended December 31, 2016 2015 2014 U.S. federal income tax statutory rate 35 % 35 % 35 % Permanent differences (4 )% (11 )% — % State tax, net of federal benefit (1 )% (6 )% — % Changes in valuation allowance for deferred tax assets (30 )% (11 )% 1 % Stock-based compensation (1 )% (8 )% — % Debt and warrant fair value adjustments — % — % (26 )% Write down of losses not previously benefitted — % — % (11 )% Other 1 % 1 % (1 )% Effective tax rate — — — The tax effects of temporary differences between financial statement and tax accounting that gave rise to significant portions of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2016 and 2015 are presented below: December 31, 2016 2015 (In thousands) Deferred tax assets: Net operating loss carryforwards $ 66,276 $ 62,671 Stock-based compensation 6,140 4,938 Tax credit carryforwards 312 323 Reserves and accruals 398 140 Intangible assets and amortization 95 150 Total gross deferred tax assets 73,221 68,222 Deferred tax liabilities: Depreciation (5,295 ) (3,841 ) Total deferred tax liabilities (5,295 ) (3,841 ) Total deferred tax assets and liabilities 67,926 64,381 Valuation allowance (67,926 ) (64,381 ) Net deferred tax asset $ — $ — The net change in the valuation allowance for the year ended December 31, 2016, was an increase of $3.5 million. The Company has recorded a full valuation allowance against its deferred tax assets due to the uncertainty associated with the utilization of the net operating loss carryforwards and other future deductible items. In assessing the realizability of deferred tax assets, the Company considers all available evidence, historical and prospective, with greater weight given to historical evidence, in determining whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of the Company’s deferred tax assets generally is dependent upon generation of future taxable income. At December 31, 2016, the Company has $176.3 million of net operating losses available to offset future federal income, if any, and which expire on various dates through December 31, 2036. For the year ended December 31, 2014, the Company performed an analysis pursuant to Internal Revenue Code Section 382, as well as similar state provisions, in order to determine whether any limitations might exist on the utilization of net operating losses and other tax attributes. Based on this analysis, the Company has determined that an ownership change occurred as a result of the June 2014 IPO, resulting in an annual limitation on the use of its net operating losses and other tax attributes as of such date. Net operating losses of $113.2 million were determined to be available. The Company also determined that built-in gains of $42.0 million existed at the date of the ownership change. Built-in gains increase the limitation under the Internal Revenue Code to the extent triggered during the five-year period subsequent to the date of change. Absent the disposition of certain built-in gain assets within the five-year period subsequent to the change in ownership, the entire $42.0 million of net operating losses will expire in June 2019. At December 31, 2016, the Company has $97.1 million of apportioned net operating losses available to offset future state taxable income, if any, and which begin to expire at various dates between 2017 and 2036. For each of the years ended December 31, 2016, 2015 and 2014, the Company did not have any material unrecognized tax benefits and thus no interest and penalties related to unrecognized tax benefits were recorded. In addition, the Company does not expect that the amount of unrecognized tax benefits will change significantly within the next twelve months. The Company files a federal income tax return in the United States and income tax returns in various state and foreign jurisdictions. All tax years are open for examination by the taxing authorities for both federal and state purposes.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	(16) Subsequent Events The Company has evaluated subsequent events through March 2, 2017, the date of issuance of the consolidated financial statements for the year ended December 31, 2016.

Quarterly Results of Operations

Quarterly Results of Operations	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations	QUARTERLY RESULTS OF OPERATIONS (in thousands, except per share data) (unaudited) Three Months Ended March 31, June 30, Sept 30, Dec 31, 2016 Total revenue $ 32,821 $ 27,718 $ 29,560 $ 27,639 Gross profit 6,527 6,653 6,402 3,729 Loss from operations (1,758 ) (1,348 ) (2,404 ) (5,710 ) Net loss (1,797 ) (1,387 ) (3,097 ) (5,742 ) Net loss per share basic and diluted common share - basic $ (0.08 ) $ (0.06 ) $ (0.13 ) $ (0.25 ) 2015 Total revenue $ 23,500 $ 30,096 $ 31,539 $ 37,384 Gross profit 4,514 5,109 5,172 9,852 Income (loss) from operations (2,745 ) (2,689 ) (2,476 ) 1,684 Net income (loss) (2,790 ) (2,743 ) (2,522 ) 1,638 Net income (loss) per share basic and diluted common share - basic $ (0.12 ) $ (0.12 ) $ (0.11 ) $ 0.07

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2016
Valuation And Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	Schedule II VALUATION AND QUALIFYING ACCOUNTS (in millions) Description Balance at Beginning of Year Charges to Costs and Expenses (a) Deductions to Allowances for Uncollectible Accounts (b) Charges to (Deductions from) Other Accounts (c) Balance at End of Year Year Ended December 31, 2016: Allowances for uncollectible accounts and sales returns and allowances $ 89 — — 4 $ 93 Year Ended December 31, 2015: Allowances for uncollectible accounts and sales returns and allowances $ 120 — — (31 ) $ 89 Year Ended December 31, 2014: Allowances for uncollectible accounts and sales returns and allowances $ 209 — — (89 ) $ 120 (a) (b) (c)

Description of Business (Polici

Description of Business (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Nature of Business	Nature of Business Aspen Aerogels, Inc. (the Company) is an aerogel technology company that designs, develops and manufactures innovative, high-performance aerogel insulation used primarily in the energy infrastructure and building materials markets. The Company also conducts research and development related to aerogel technology supported by funding from several agencies of the U.S. government and other institutions in the form of research and development contracts. The Company maintains its corporate offices in Northborough, Massachusetts. The Company has three wholly owned subsidiaries: Aspen Aerogels Rhode Island, LLC, Aspen Aerogels Germany, GmbH and Aspen Aerogels Georgia, LLC . On June 18, 2014, the Company completed an initial public offering (IPO) of 7,500,000 shares of its common stock at a public offering price of $11.00 per share. The Company received net proceeds of $74.7 million after deducting underwriting discounts and commissions of $4.3 million and offering expenses of approximately $3.5 million. Upon the closing of the offering, all of the Company’s then-outstanding (i) warrants to purchase Series C preferred stock, (the “Series C warrants”) were subject to an automatic net cashless exercise, (ii) convertible preferred stock (including the shares of Series C preferred stock issued upon the automatic net cashless exercise of Series C warrants) automatically converted into 115,982 shares of common stock, and (iii) convertible notes automatically converted into 15,319,034 shares of common stock.
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP), include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements requires the Company to make a number of estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates and assumptions include allowances for doubtful accounts, sales returns and allowances, product warranty costs, inventory valuation, the carrying amount of property and equipment, stock-based compensation and deferred income taxes. The Company evaluates its estimates and assumptions on an on-going basis using historical experience and other factors, including the current economic environment, which are believed to be reasonable under the circumstances. Management adjusts such estimates and assumptions when facts and circumstances dictate. Illiquid credit markets, volatile equity markets and declines in business investment increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in these estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods.
Cash & Cash Equivalents	Cash & Cash Equivalents Cash equivalents include short-term, highly liquid instruments, which consist of money market accounts. All cash and cash equivalents are maintained with major financial institutions in North America. Deposits with these financial institutions may exceed the amount of insurance provided on such deposits; however, these deposits typically may be redeemed upon demand and, therefore, bear minimal risk.
Marketable Securities	Marketable Securities Marketable securities consisted primarily of marketable debt securities which are classified as available-for-sale and are carried at fair value. The Company held no marketable securities as of December 31, 2016 or 2015. During the year ended December 31, 2015, the Company purchased $2.5 million of marketable securities which matured during the same period. The unrealized gains and losses on available-for-sale securities are recorded in accumulated other comprehensive income (loss). The Company considers all highly liquid investments with maturities of 90 days or less at the time of purchase to be cash equivalents, and investments with maturities of greater than 90 days at the time of purchase to be marketable securities. When a marketable security incurs a significant unrealized loss for a sustained period of time, the Company will review the instrument to determine if it is other-than-temporarily impaired. If it is determined that an instrument is other-than-temporarily impaired, the Company will record the unrealized loss in the consolidated statement of operations.
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Accumulated other comprehensive income (loss) consisted of changes in the fair market value of available-for-sale securities. As of December 31, 2016 and 2015, the Company held no marketable securities.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value is an exit price that represents the amount that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants. Accordingly, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. The Company discloses the manner in which fair value is determined for assets and liabilities based on a three-tiered fair value hierarchy. The hierarchy ranks the quality and reliability of the information used to determine the fair values. The three levels of inputs described in the standard are: Level 1: Quoted prices in active markets for identical assets or liabilities. Level 2: Observable inputs, other than Level 1 prices, for the assets or liabilities, either directly or indirectly, for substantially the full term of the assets or liabilities. Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Under the Fair Value Option Subsections of Financial Accounting Standards Board (FASB) ASC Subtopic 825-10, Financial Instruments — Overall At December 31, 2016 and 2015, no financial assets or liabilities were measured at fair value. During the year ended December 31, 2014 (prior to the completion of the Company’s IPO on June 18, 2014), the Company valued its then outstanding debt instruments utilizing Level 3 inputs. During the year ended December 31, 2015, the Company purchased $2.5 million of marketable securities which matured during the same period. During this period, the instruments were valued utilizing Level 1 inputs. As of December 31, 2016 and December 31, 2015, the Company held no marketable securities.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments, which potentially expose the Company to concentrations of credit risk, consist principally of accounts receivable. The Company’s customers are primarily insulation distributors, insulation contractors, insulation fabricators and select end-users located throughout the world. The Company performs ongoing credit evaluations of its customers’ financial condition and generally requires no collateral to secure accounts receivable. The Company maintains an allowance for doubtful accounts based on its assessment of the collectability of accounts receivable. The Company reviews the allowance for doubtful accounts quarterly. The Company has not experienced any meaningful non-payment or write-offs of accounts receivable. Accordingly, the allowance for doubtful accounts was zero at December 31, 2016 and 2015. The Company does not have any off-balance-sheet credit exposure related to its customers. For the year ended December 31, 2016, two customers represented 25% and 15% of total revenue, respectively. For the year ended December 31, 2015, two customers represented 14% and 12% of total revenue, respectively. For the year ended December 31, 2014, two customers represented 13% and 12% of total revenue, respectively. At December 31, 2016, the Company had three customers that accounted for 31%, 17% and 10% of accounts receivable, respectively. At December 31, 2015, the Company had three customers that accounted for 17%, 14% and 13% of accounts receivable, respectively.
Inventories	Inventories Inventory consists of finished products and raw materials. Inventories are carried at lower of cost, determined using the first-in, first-out (FIFO) method, or market. Cost includes materials, labor and manufacturing overhead. Manufacturing overhead is allocated to the costs of conversion based on normal capacity of the Company’s production facility. Abnormal freight, handling costs and material waste is expensed in the period it occurs. The Company periodically reviews its inventories and makes provisions as necessary for estimated excess, obsolete or damaged goods to ensure values approximate the lower of cost or market. The amount of any such provision is equal to the difference between the cost of inventory and the estimated market value based upon assumptions about future demand, selling prices and market conditions.
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment are stated at cost. Assets held under capital leases are stated at the lesser of the present value of future minimum payments, using the Company’s incremental borrowing rate, or the fair value of the property at the inception of the lease. Expenditures for maintenance and repairs are charged to expense as incurred, whereas major betterments are capitalized as additions to property, plant and equipment. Interest expense capitalization commences at the time a capital project begins construction and concludes when the project is completed. The Company has capitalized interest costs as part of the historical cost of constructing its manufacturing facilities. The Company capitalized $0.0 million, $0.0 million and $0.1 million in interest costs related to the build-out of the East Providence facility during the years ended December 31, 2016, 2015 and 2014, respectively. Depreciation on plant and equipment is calculated on the straight-line method over the estimated useful lives of the assets. Assets related to capital leases are amortized on a straight-line basis over the shorter of the lease term or estimated useful life of the asset. Assets utilized in the Company’s operations that are taken out of service with no future use are charged to cost of sales or operating expenses, depending on the department in which the asset was utilized. Write-offs of construction in progress are charged to operating expenses upon the determination of no future use.
Other Assets	Other Assets Other assets primarily include long-term deposits.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. Recognition and measurement of a potential impairment is performed on assets grouped with other assets and liabilities at the lowest level where identifiable cash flows are largely independent of the cash flows of other assets and liabilities. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset or asset group to future undiscounted net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset or asset group exceeds its estimated undiscounted future cash flows, an impairment charge is recognized for the amount by which the carrying amount of the asset or asset group exceeds the fair value of the asset or asset group. Fair value is determined through various valuation techniques including discounted cash flow models, quoted market values and third-party independent appraisals, as considered necessary.
Asset Retirement Obligations	Asset Retirement Obligations The Company records asset retirement obligations associated with its lease obligations and the retirement of tangible long-lived assets. The Company reviews legal obligations associated with the retirement of long-lived assets that result from contractual obligations or the acquisition, construction, development and/or normal use of the assets. If it is determined that a legal obligation exists, regardless of whether the obligation is conditional on a future event, the fair value of the liability for an asset retirement obligation is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. An amount equal to the fair value of the liability is also recorded as a long-term asset that is depreciated over the estimated life of the asset. The difference between the gross expected future cash outflow and its present value is accreted over the life of the related lease as an operating expense. The Company fully satisfied its asset retirement obligation during the year ended December 31, 2016.
Deferred Revenue	Deferred Revenue The Company records deferred revenue for product sales when (i) the Company has delivered products but other revenue recognition criteria have not been satisfied, (ii) payments have been received in advance of products being delivered, or (iii) subject to customer rebate agreements.
Deferred Rent	Deferred Rent For leases that contain fixed increases in the minimum annual lease payment during the original term of the lease, the Company recognizes rental expense on a straight-line basis over the lease term, and records the difference between rent expense and the amount currently payable as deferred rent. Lease incentives for allowances for qualified leasehold improvements received from landlords are amortized on a straight-line basis over the lease term. Deferred rent is included in other long-term liabilities on the consolidated balance sheet.
Revenue Recognition	Revenue Recognition The Company recognizes revenue from the sale of products and performance of research and development services. Revenue is recognized when all of the following criteria are met: persuasive evidence of an arrangement exists, the price to the buyer is fixed or determinable, delivery has occurred or services have been provided, and collectability is reasonably assured.
Product Revenue	Product Revenue Product revenue is recognized upon transfer of title and risk of loss, which is upon shipment or delivery. The Company’s customary shipping terms are free on board shipping point. Sales returns are recorded based on historical sales and return information. Products that exhibit unusual sales return patterns due to quality or other manufacturing matters are specifically investigated and analyzed as part of the sales return accrual. The sales return accrual represents a reserve for products that may be returned due to quality concerns or authorized for destruction in the field. Sales return reserves are recorded at full original sales value. The Company rarely exchanges products from inventory for returned products. Sales return reserves were $0.1 million at December 31, 2016 and 2015. For initial shipments of products where the Company is unsure of meeting the customer’s specifications, the Company will defer the recognition of product revenue and related costs until written customer acceptance is obtained.
Research Services Revenue	Research Services Revenue The Company performs research services under contracts with various government agencies and other institutions. The Company records revenue earned on research services contracts using the percentage-of-completion method in two ways: (1) for firm-fixed-price contracts, the Company accrues that portion of the total contract price that is allocable, on the basis of the Company’s estimates of costs incurred to date to total contract costs; and (2) for cost-plus-fixed-fee contracts, the Company records revenue that is equal to total payroll cost incurred times a stated factor plus reimbursable expenses, to a stated upper limit. The primary cost is the labor effort expended in completing research, and the only deliverable, other than the labor hours expended, is reporting of research results to the customer. Because the input measure of labor hours expended is also reflective of the output measure, it is a reliable means to measure the extent of progress towards completion. Revisions in cost estimates and fees during the course of the contract are reflected in the accounting period in which the facts that require the revisions become known. Contract costs and rates used to allocate overhead to contracts are subject to audit by the respective contracting government agency. Adjustments to revenue as a result of audit are recorded in the period they become known. To date, adjustments to revenue as a result of audit have been insignificant.
Warranty	Warranty The Company provides warranties for its products and records the estimated cost within cost of sales in the period that the related revenue is recorded. The Company’s standard warranty period extends to one to two years from the date of shipment. The standard warranties provide that the Company’s products will be free from defects in material and workmanship, and will, under normal use, conform to the specifications for the product. Historically, warranty claims and charges have been insignificant. The Company’s products may be utilized in systems that may involve new technical demands and new configurations. As such, the Company regularly reviews and assesses whether warranty reserves shall be recorded in the period the related revenue is recorded. For the year ended December 31, 2016, the Company recorded warranty expense of $0.5 million. This specific reserve was principally related to product warranty claims for specific projects. These claims were outside of the Company’s typical experience. As of December 31, 2016, the Company had satisfied all outstanding warranty claims. Additionally, during the year ended December 31, 2016, a customer notified the Company of a specific product application issue. The customer continues to request and receive shipment of additional aerogel product and no claim has been made. The Company cannot be certain that it will not be subject to a future warranty claim.
Shipping and Handling Costs	Shipping and Handling Costs Shipping and handling costs are classified as a component of cost of revenue. Customer payments of shipping and handling costs are recorded as product revenue.
Stock-based Compensation	Stock-based Compensation The Company grants share-based awards to its employees and non-employee directors. All share-based awards granted, including grants of stock options, restricted stock and restricted stock units (RSUs), are recognized in the statement of operations based on their fair value as of the date of grant. Expense is recognized on a straight-line basis over the requisite service period for all awards with service conditions. For performance-based awards, the grant date fair value is recognized as expense when the condition is probable of being achieved, and then on a graded basis over the requisite service period. The Company uses the Black-Scholes option-pricing model to determine the fair value of service-based option awards, which requires a number of complex and subjective assumptions including fair value of the underlying security, the expected volatility of the underlying security, a risk-free interest rate and the expected term of the option. The fair value of restricted stock and RSUs is determined using the closing price of the Company’s common stock on the date of grant. All shares of restricted stock are not transferable until they vest. Restricted stock is typically issued to non-employee directors and typically vests over a one-year period from the date of issuance. RSUs are issued to employees and typically vest over a three to four year period from the date of issuance. The fair value of restricted stock and RSUs upon which vesting is solely service-based is expensed ratably over the vesting period. If the service condition underlying shares of restricted stock is not met for any reason, the shares of unvested restricted stock will be forfeited and returned to the Company. For stock options that contain a market condition, the Company uses the Monte-Carlo simulation option-pricing model to determine the fair value of market based awards. The Monte-Carlo simulation option-pricing model takes into account the same input assumptions as the Black-Scholes model; however, it also further incorporates into the fair-value determination, the possibility that the market condition may not be satisfied. Compensation costs related to awards with a market condition are recognized regardless of whether the market condition is satisfied, provided that the requisite service has been provided. Stock-based compensation expense is recognized on a straight-line basis over the requisite service period for each such award. Pursuant to the evergreen provisions of the 2014 Employee, Director and Consultant Equity Incentive Plan, the number of shares of common stock authorized for issuance under the plan automatically increased by 463,697 shares to 6,069,201 shares effective January 1, 2016.
Research and Development	Research and Development Costs incurred in the research and development of the Company’s products include compensation and related costs, services provided by third-party contractors, materials and supplies and are classified as research and development expenses as incurred. Research and development costs directly associated with research services revenue are classified as research services in cost of revenue.
Earnings per Share	Earnings per Share The Company calculates net income (loss) per common share based on the weighted-average number of common shares outstanding during each period. Potential common stock equivalents are determined using the treasury stock method. The weighted-average number of common shares included in the computation of diluted net income (loss) gives effect to all potentially dilutive common equivalent shares, including outstanding stock options, RSUs and warrants. Common equivalent shares are excluded from the computation of diluted net income (loss) per share if their effect is antidilutive. Diluted net income (loss) per share is computed using the more dilutive of (a) the two-class method, or (b) the if-converted method. The Company allocates net income (loss) first to preferred stockholders and holders of warrants to purchase preferred stock based on dividend rights and then to common stockholders, preferred stockholders and preferred warrant holders based on ownership interests. The weighted-average number of common shares included in the computation of diluted net income (loss) gives effect to all potentially dilutive common equivalent shares, including outstanding stock options, RSUs and warrants. Common equivalent shares are excluded from the computation of diluted net income (loss) per share if their effect is antidilutive.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. The Company accounts for uncertain tax positions using a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Differences between tax positions taken in a tax return and amounts recognized in the financial statements are recorded as adjustments to income taxes payable or receivable, or adjustments to deferred taxes, or both. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company recognizes penalties and interest related to uncertain tax positions, if any, as a component of income tax expense.
Segments	Segments Operating segments are identified as components of an enterprise about which separate, discrete financial information is available for evaluation by the chief operating decision maker in making decisions on how to allocate resources and assess performance. The Company’s chief operating decision maker is the Chief Executive Officer. The Company’s chief operating decision maker reviews consolidated operating results to make decisions about allocating resources and assessing performance for the entire Company. The Company views its operations and manages its business as one operating segment. Information about the Company’s revenues, based on shipment destination or research services location, is presented in the following table: Year Ended December 31, 2016 2015 2014 (In thousands) Revenue: U.S. $ 35,726 $ 44,553 $ 39,809 International 82,012 77,965 62,590 Total $ 117,738 $ 122,518 $ 102,399
Recently Issued Accounting Standards	Recently Issued Accounting Standards In August 2016, the (FASB) issued Accounting Standards Update (ASU) No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (FASB ASU 2016-15). This amendment addresses eight classification issues related to the statement of cash flows. For public business entities, the amendments in FASB ASU 2016-15 are effective for public business entities for annual and interim periods in fiscal years beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. The Company has not yet selected a transition method and is evaluating the effect the updated standard will have on its consolidated financial statements and related disclosures. In March 2016, the FASB issued FASB ASU No. 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (FASB ASU 2016-09). The amendment is to simplify several aspects of the accounting for share-based payment transactions including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. For public entities, the amendments in FASB ASU 2016-09 are effective for interim and annual reporting periods beginning after December 15, 2016. The Company has determined that the adoption of this standard will not have a material impact on its consolidated results of operations and financial condition. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In November 2015, the FASB issued ASU 2015-17, Income Taxes: Balance Sheet Classification of Deferred Taxes In August 2015, the FASB issued a deferral of ASU 2014-09, Revenue from Contracts with Customers The Company has not yet selected a transition method and is evaluating the effect that the updated standard will have on its consolidated financial statements and related disclosures. In July 2015, the FASB issued ASU 2015-11, which, for entities that do not measure inventory using the last-in, first-out (LIFO) or retail inventory method, changes the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value. The ASU also eliminates the requirement for these entities to consider replacement cost or net realizable value less an approximately normal profit margin when measuring inventory. Public entities are required to apply the new standard for annual reporting periods beginning after December 15, 2016 and interim periods within those fiscal periods. This standard is to be applied prospectively. Early adoption is permitted as of the beginning of an interim or annual period. The Company does not expect the adoption of this standard to have a material impact on its consolidated financial statements and related disclosures. From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies and adopted by the Company as of the specified effective date. Unless otherwise discussed, the Company believes that the impact of recently issued standards that are not yet effective will not have a material impact on its financial position or results of operations upon adoption.

Summary of Basis of Presentat26

Summary of Basis of Presentation and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Schedule of Revenues, Based on Shipment Destination or Research Services Location	Information about the Company’s revenues, based on shipment destination or research services location, is presented in the following table: Year Ended December 31, 2016 2015 2014 (In thousands) Revenue: U.S. $ 35,726 $ 44,553 $ 39,809 International 82,012 77,965 62,590 Total $ 117,738 $ 122,518 $ 102,399

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consist of the following: December 31, 2016 2015 (In thousands) Raw material $ 3,511 $ 4,432 Finished goods 9,357 2,100 Total $ 12,868 $ 6,532

Property, Plant and Equipment28

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Summary of Property, Plant and Equipment	Property, plant and equipment consist of the following: December 31, 2016 2015 Useful life (In thousands) Construction in progress $ 11,139 $ 5,138 — Buildings 23,901 23,884 30 years Machinery and equipment 113,659 104,658 3 — 10 years Computer equipment and software 7,679 6,888 3 years Total 156,378 140,568 Accumulated depreciation and amortization (71,984 ) (62,246 ) Property, plant and equipment, net $ 84,394 $ 78,322

Accrued Expenses (Tables)

Accrued Expenses (Tables)	12 Months Ended
	Dec. 31, 2016
Payables And Accruals [Abstract]
Schedule of Accrued Expenses	Accrued expenses consist of the following: December 31, 2016 2015 (In thousands) Employee compensation $ 2,796 $ 4,184 Other accrued expenses 1,191 1,384 $ 3,987 $ 5,568

Other Long-term Liabilities (Ta

Other Long-term Liabilities (Tables)	12 Months Ended
	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Summary of Other Long-term Liabilities	Other long-term liabilities consist of the following: December 31, 2016 2015 (In thousands) Asset retirement obligations (ARO) $ — $ 397 Deferred rent 1,125 163 1,125 560 Current maturities of other long-term liabilities (154 ) (409 ) Other long-term liabilities, less current maturities $ 971 $ 151
Summary of ARO Activity	A summary of ARO activity consists of the following: Year Ended December 31, 2016 2015 (In thousands) Balance at beginning of period $ 397 $ 1,018 Accretion of discount expense — 21 Settlement costs (397 ) (642 ) Balance at end of period $ — $ 397

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Summary of Future Minimum Payments Under Capital Leases	Future minimum payments under capital leases at December 31, 2016 are as follows: Year Capital Lease Obligations (In thousands) 2017 $ 37 2018 5 Total 42 Less portion representing interest (3 ) Present value of future minimum payments 39 Current maturities of capital lease payments (35 ) Capital leases, excluding current portion $ 4
Summary of Future Minimum Lease Payments Under Operating Leases	Future minimum lease payments under operating leases at December 31, 2016 are as follows: Year Operating Leases (In thousands) 2017 $ 1,222 2018 1,239 2019 813 2020 640 2021 505 Thereafter 2,512 Total minimum lease payments $ 6,931

Employee Stock Ownership Plans

Employee Stock Ownership Plans (Tables)	12 Months Ended
	Dec. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock Based Compensation Included in Cost of Sales or Operating Expenses	Stock-based compensation is included in cost of sales or operating expenses, as applicable, and consists of the following: Year Ended December 31, 2016 2015 2014 (In thousands) Cost of product revenue $ 796 $ 824 $ 1,121 Research and development expenses 594 666 1,046 Sales and marketing expenses 1,066 1,012 1,390 General and administrative expenses 2,857 2,911 5,224 Total stock-based compensation $ 5,313 $ 5,413 $ 8,781
Summary of Fair Value of Option Awards Estimated by Use of Black-Scholes Option Pricing Model	The following information relates to the fair value of the option awards estimated by use of the Black-Scholes option pricing model: Year Ended December 31, 2016 2015 2014 (In thousands) Weighted average assumptions: Expected term (in years) 5.86 6.02 6.17 Expected volatility 53.56 % 57.95 % 50.09 % Risk free rate 1.36 % 1.79 % 1.94 % Expected dividend yield 0.00 % 0.00 % 0.00 % Weighted average fair value: Grant-date fair value of options granted $ 2.16 $ 3.82 $ 5.37 Grant-date fair value of options vested $ 7.58 $ 11.89 $ 97.33 Aggregate intrinsic value of options exercised $ — $ — $ 4,816.50
Summary of Stock Option Outstanding	The following table summarizes information about stock options outstanding: Number of Shares Weighted Average Grant Date Fair Value Per Share Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value ($ in thousands, except share and per share data) Options outstanding at December 31, 2015 1,702,337 $ 9.60 $ 13.47 9.08 $ 6,152 Granted 382,033 $ 2.16 $ 4.30 Forfeited (20,796 ) $ 6.62 $ 10.58 Exercised — $ — $ — $ — Options outstanding at December 31, 2016 2,063,574 $ 8.26 $ 11.80 8.30 $ 36,326 Exercisable at December 31, 2016 707,260 $ 17.10 $ 19.81 7.68 $ — Expected to vest at December 31, 2016 1,190,710 $ 3.58 $ 6.99 8.67 $ 31,473
Summary of Grants of RSUs	Information related to grants of RSUs during 2016 is as follows: Restricted Stock Units Weighted Average Grant Date Fair Value Balance at December 31, 2015 417,126 $ 9.01 Granted 429,803 4.04 Vested (155,707 ) 9.20 Forfeited (9,137 ) 9.37 Balance at December 31, 2016 682,085 $ 5.83

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Income (Loss) Per Share	The computation of basic and diluted net income (loss) per share consists of the following: Year ended December 31, 2016 2015 2014 (In thousands, except share and per share data) Numerator: Net loss $ (12,023 ) $ (6,417 ) $ (66,324 ) Denominator: Weighted average shares outstanding, basic and diluted 23,139,807 22,986,931 12,349,456 Net loss per share, basic and diluted $ (0.52 ) $ (0.28 ) $ (5.37 )
Summary of Potential Dilutive Common Shares Excluded from Computation of Diluted Net Loss Per Share	Potential dilutive common shares that were excluded from the computation of diluted net loss per share because they were anti-dilutive consist of the following: Year ended December 31, 2016 2015 2014 Common stock options 2,063,574 1,702,337 1,026,510 Restricted common stock units 682,085 417,126 314,640 Common stock warrants 115 131 131 Restricted common stock awards 153,277 132,130 — Total 2,899,051 2,251,724 1,341,281

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Schedule of Reconciliation Between U.S. Statutory Income Tax Rate and Company's Effective Rate	The reconciliation between the U.S. statutory income tax rate and the Company’s effective rate consists of the following: Year Ended December 31, 2016 2015 2014 U.S. federal income tax statutory rate 35 % 35 % 35 % Permanent differences (4 )% (11 )% — % State tax, net of federal benefit (1 )% (6 )% — % Changes in valuation allowance for deferred tax assets (30 )% (11 )% 1 % Stock-based compensation (1 )% (8 )% — % Debt and warrant fair value adjustments — % — % (26 )% Write down of losses not previously benefitted — % — % (11 )% Other 1 % 1 % (1 )% Effective tax rate — — —
Schedule of Deferred Tax Assets and Deferred Tax Liabilities	The tax effects of temporary differences between financial statement and tax accounting that gave rise to significant portions of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2016 and 2015 are presented below: December 31, 2016 2015 (In thousands) Deferred tax assets: Net operating loss carryforwards $ 66,276 $ 62,671 Stock-based compensation 6,140 4,938 Tax credit carryforwards 312 323 Reserves and accruals 398 140 Intangible assets and amortization 95 150 Total gross deferred tax assets 73,221 68,222 Deferred tax liabilities: Depreciation (5,295 ) (3,841 ) Total deferred tax liabilities (5,295 ) (3,841 ) Total deferred tax assets and liabilities 67,926 64,381 Valuation allowance (67,926 ) (64,381 ) Net deferred tax asset $ — $ —

Quarterly Results of Operatio35

Quarterly Results of Operations (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Financial Information	QUARTERLY RESULTS OF OPERATIONS (in thousands, except per share data) (unaudited) Three Months Ended March 31, June 30, Sept 30, Dec 31, 2016 Total revenue $ 32,821 $ 27,718 $ 29,560 $ 27,639 Gross profit 6,527 6,653 6,402 3,729 Loss from operations (1,758 ) (1,348 ) (2,404 ) (5,710 ) Net loss (1,797 ) (1,387 ) (3,097 ) (5,742 ) Net loss per share basic and diluted common share - basic $ (0.08 ) $ (0.06 ) $ (0.13 ) $ (0.25 ) 2015 Total revenue $ 23,500 $ 30,096 $ 31,539 $ 37,384 Gross profit 4,514 5,109 5,172 9,852 Income (loss) from operations (2,745 ) (2,689 ) (2,476 ) 1,684 Net income (loss) (2,790 ) (2,743 ) (2,522 ) 1,638 Net income (loss) per share basic and diluted common share - basic $ (0.12 ) $ (0.12 ) $ (0.11 ) $ 0.07

Description of Business - Addit

Description of Business - Additional Information (Detail) $ / shares in Units, $ in Thousands	Jun. 18, 2014USD ($)$ / sharesshares	Dec. 31, 2016Subsidiary	Dec. 31, 2014USD ($)
Basis Of Presentation [Line Items]
Number of Subsidiaries | Subsidiary		3
Proceeds from initial public offering			$ 74,712
Convertible Preferred Stock [Member]
Basis Of Presentation [Line Items]
Common shares issued upon conversion of securities | shares	115,982
Convertible Debt Securities [Member]
Basis Of Presentation [Line Items]
Common shares issued upon conversion of securities | shares	15,319,034
IPO [Member]
Basis Of Presentation [Line Items]
Initial public offering, common stock shares | shares	7,500,000
Initial public offering, common stock price per share | $ / shares	$ 11
Proceeds from initial public offering	$ 74,700
Underwriting discounts and commissions	4,300
Other offering expenses	$ 3,500

Summary of Basis of Presentat37

Summary of Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)	Jan. 02, 2016shares	Dec. 11, 2015	Dec. 31, 2016USD ($)CustomerSegmentshares	Dec. 31, 2015USD ($)Customer	Dec. 31, 2014USD ($)Customer	Jan. 01, 2016shares
Summary Of Significant Accounting Policies [Line Items]
Marketable Securities			$ 0	$ 0
Purchase of marketable securities				2,500,000
Description of impaired investment securities			The unrealized gains and losses on available-for-sale securities are recorded in accumulated other comprehensive income (loss). The Company considers all highly liquid investments with maturities of 90 days or less at the time of purchase to be cash equivalents, and investments with maturities of greater than 90 days at the time of purchase to be marketable securities. When a marketable security incurs a significant unrealized loss for a sustained period of time, the Company will review the instrument to determine if it is other-than-temporarily impaired. If it is determined that an instrument is other-than-temporarily impaired, the Company will record the unrealized loss in the consolidated statement of operations.
Available-for-sale securities			$ 0	0
Allowance for doubtful accounts			0	0
Capitalized interest expense			0	0	$ 100,000
Warranty expense			$ 500,000
Number of segment | Segment			1
2014 Equity Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Increased number of shares authorized for grant | shares			2,817,106
2014 Equity Plan [Member] | Restricted Stock Units [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock-based award vesting period			3 years
2014 Equity Plan [Member] | Non-Employee Directors [Member] | Restricted Common Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock-based award vesting period			1 year
2014 Employee Director and Consultant Equity Incentive Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Authorized for issuance, number of shares increased by | shares	463,697
Increased number of shares authorized for grant | shares						6,069,201
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Standard product warranty period			1 year
Stock-based award vesting period		3 years
Minimum [Member] | Restricted Stock Units [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock-based award vesting period			3 years
Minimum [Member] | 2014 Equity Plan [Member] | Restricted Stock Units [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock-based award vesting period			3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Standard product warranty period			2 years
Maximum [Member] | Restricted Stock Units [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock-based award vesting period			4 years
Maximum [Member] | 2014 Equity Plan [Member] | Restricted Stock Units [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock-based award vesting period			4 years
Sales Returns Reserve [Member]
Summary Of Significant Accounting Policies [Line Items]
Sales return reserves			$ 100,000	$ 100,000
Total Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of customers | Customer			2	2	2
Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of customers | Customer			3	3
Customer One [Member] | Total Revenue [Member] | Customer Concentration Risk [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			25.00%	14.00%	13.00%
Customer One [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			31.00%	17.00%
Customer Two [Member] | Total Revenue [Member] | Customer Concentration Risk [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			15.00%	12.00%	12.00%
Customer Two [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			17.00%	14.00%
Customers Three [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			10.00%	13.00%

Summary of Basis of Presentat38

Summary of Basis of Presentation and Significant Accounting Policies - Schedule of Revenues, Based on Shipment Destination or Research Services Location (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenue	$ 27,639	$ 29,560	$ 27,718	$ 32,821	$ 37,384	$ 31,539	$ 30,096	$ 23,500	$ 117,738	$ 122,518	$ 102,399
U.S. [Member]
Segment Reporting Information [Line Items]
Revenue									35,726	44,553	39,809
International [Member]
Segment Reporting Information [Line Items]
Revenue									$ 82,012	$ 77,965	$ 62,590

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw material	$ 3,511	$ 4,432
Finished goods	9,357	2,100
Total	$ 12,868	$ 6,532

Property, Plant and Equipment40

Property, Plant and Equipment, Net - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 156,378	$ 140,568
Accumulated depreciation and amortization	(71,984)	(62,246)
Property, plant and equipment, net	84,394	78,322
Construction in Progress [Member]
Property Plant and Equipment [Line Items]
Property, plant and equipment, gross	11,139	5,138
Buildings [Member]
Property Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 23,901	23,884
Property, plant and equipment, Useful life	30 years
Machinery and Equipment [Member]
Property Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 113,659	104,658
Machinery and Equipment [Member] | Minimum [Member]
Property Plant and Equipment [Line Items]
Property, plant and equipment, Useful life	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property Plant and Equipment [Line Items]
Property, plant and equipment, Useful life	10 years
Computer Equipment and Software [Member]
Property Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 7,679	$ 6,888
Property, plant and equipment, Useful life	3 years

Property, Plant and Equipment41

Property, Plant and Equipment, Net - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property Plant and Equipment [Line Items]
Plant and equipment under capital leases	$ 100,000	$ 100,000
Depreciation expense	9,800,000	9,800,000	$ 10,100,000
Property, plant and equipment, gross	156,378,000	140,568,000
Construction in Progress [Member]
Property Plant and Equipment [Line Items]
Property, plant and equipment, gross	11,139,000	5,138,000
Statesboro, Georgia [Member] | Construction in Progress [Member]
Property Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,200,000	2,300,000
Maximum [Member]
Property Plant and Equipment [Line Items]
Amortization under capital leases	$ 100,000	$ 100,000	$ 100,000

Accrued Expenses - Schedule of

Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities Current [Abstract]
Employee compensation	$ 2,796	$ 4,184
Other accrued expenses	1,191	1,384
Total	$ 3,987	$ 5,568

Revolving Line of Credit - Addi

Revolving Line of Credit - Additional Information (Detail) - Silicon Valley Bank Credit Facility [Member] - Loan Agreement [Member] - USD ($)	Jan. 27, 2017	Dec. 31, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
Maximum increased borrowing amount		$ 20,000,000
Interest rate description		The interest rate applicable to borrowings may be based on the prime rate or LIBOR. Prime rate-based rates vary from prime rate plus 0.75% per annum to prime rate plus 1.75% per annum, while LIBOR-based rates vary from LIBOR plus 3.75% per annum to LIBOR plus 4.25% per annum.
Percentage of unused line fee		0.50%
Loan agreement amount withdrawn		$ 0	$ 0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Letters of credit outstanding		2,700,000	$ 2,700,000
Loan agreement borrowing capacity		$ 12,100,000
Prime Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Additional interest rate per annum		0.75%
Prime Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Additional interest rate per annum		1.75%
LIBOR Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Additional interest rate per annum		3.75%
LIBOR Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Additional interest rate per annum		4.25%
Subsequent Event [Member]
Line of Credit Facility [Line Items]
Line of credit agreement, extended maturity date	Jan. 28, 2018

Other Expense, Net - Additional

Other Expense, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Non Operating Income Expense [Line Items]
Other expense, net	$ 800
Financing and debt issuance costs	656		$ 47
Interest expense	$ (147)	$ (182)	(50,281)
Change in fair value of debt instruments			50,000
Silicon Valley Bank Credit Facility [Member]
Other Non Operating Income Expense [Line Items]
Interest expense			$ 300

Other Long-term Liabilities - S

Other Long-term Liabilities - Summary of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Long Term Liabilities [Abstract]
Asset retirement obligations (ARO)		$ 397	$ 1,018
Deferred rent	$ 1,125	163
Other liabilities, total	1,125	560
Current maturities of other long-term liabilities	(154)	(409)
Other long-term liabilities	$ 971	$ 151

Other Long-term Liabilities - A

Other Long-term Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Line Items]
Asset retirement obligations		$ 397	$ 1,018
Expenditures	$ 397	$ 642
ARO reserve reclassified to other long-term liabilities	200
Facility Lease [Member]
Other Liabilities Disclosure [Line Items]
Expenditures	$ 200

Other Long-term Liabilities -47

Other Long-term Liabilities - Summary of ARO Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Asset Retirement Obligation [Abstract]
Balance at beginning of period	$ 397	$ 1,018
Accretion of discount expense		21
Settlement costs	$ (397)	(642)
Balance at end of period		$ 397

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	Jun. 29, 2016USD ($)ft²	Dec. 31, 2016USD ($)Installment	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Commitments And Contingencies [Line Items]
Lease annual base rent		$ 1,500,000	$ 1,600,000	$ 1,200,000
Leasehold improvement costs capitalized		700,000
Silicon Valley Bank Credit Facility [Member] | Revolving Credit Facility [Member]
Commitments And Contingencies [Line Items]
Letters of credit outstanding		$ 2,700,000	2,700,000
Landlord [Member] | New Lease Agreement [Member]
Commitments And Contingencies [Line Items]
Number of square feet for lease | ft²	51,650
Lease end date	Dec. 31, 2026
Lease commence date	Jan. 1, 2017
Lease annual base rent	$ 408,000
Lease increased percentage	3.00%
Lease extended term	3 years
Amount receivables as an aid to construction of improvements of the leased premise	$ 1,200,000
BASF [Member] | Supply and Joint Development Agreement [Member]
Commitments And Contingencies [Line Items]
Supply agreement termination date		Dec. 31, 2027
Non-interest bearing prepayment, aggregate amount		$ 22,000,000
Number of quarterly installments | Installment		8
Maximum [Member] | BASF [Member] | Supply and Joint Development Agreement [Member]
Commitments And Contingencies [Line Items]
Credit limit percentage on prepayment balance		25.30%
Computer Equipment and Vehicles [Member]
Commitments And Contingencies [Line Items]
Recorded balance of capital lease obligations		$ 100,000
Computer Equipment and Vehicles [Member] | Maximum [Member]
Commitments And Contingencies [Line Items]
Recorded balance of capital lease obligations			$ 100,000
Plant Two [Member] | Minimum [Member] | BASF [Member] | Supply and Joint Development Agreement [Member] | Third Party Lender [Member]
Commitments And Contingencies [Line Items]
Secured debt, commitment		$ 30,000,000

Commitments and Contingencies49

Commitments and Contingencies - Summary of Future Minimum Payments Under Capital Leases (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
2,017	$ 37
2,018	5
Total	42
Less portion representing interest	(3)
Present value of future minimum payments	39
Current maturities of capital lease payments	(35)	$ (67)
Capital leases, excluding current portion	$ 4	$ 40

Commitments and Contingencies50

Commitments and Contingencies - Summary of Future Minimum Payments Under Operating Leases (Detail) $ in Thousands	Dec. 31, 2016USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,017	$ 1,222
2,018	1,239
2,019	813
2,020	640
2,021	505
Thereafter	2,512
Total minimum lease payments	$ 6,931

Conversion of Redeemable Conv51

Conversion of Redeemable Convertible Preferred Stock - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016shares
Reclassification of Redeemable Convertible Preferred Stock from Temporary to Permanent Equity [Member]
Schedule Of Redeemable Convertible Preferred Stock [Line Items]
Common shares issued upon conversion of securities	115,982

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Jun. 18, 2014	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Stockholder Equity [Line Items]
Proceeds from initial public offering		$ 74,712
Total number of shares authorized			130,000,000	130,000,000
Common stock, shares authorized			125,000,000	125,000,000
Preferred stock, shares authorized			5,000,000	5,000,000
Convertible Preferred Stock [Member]
Stockholder Equity [Line Items]
Common shares issued upon conversion of securities	115,982
Convertible Debt Securities [Member]
Stockholder Equity [Line Items]
Common shares issued upon conversion of securities	15,319,034
IPO [Member]
Stockholder Equity [Line Items]
Initial public offering, common stock shares	7,500,000
Initial public offering, common stock price per share	$ 11
Proceeds from initial public offering	$ 74,700
Underwriting discounts and commissions	4,300
Other offering expenses	$ 3,500

Employee Benefit Plan - Additio

Employee Benefit Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Exercise Price And Additional Disclosures [Abstract]
Matching contribution during the period	$ 200,000	$ 100,000	$ 0

Employee Stock Ownership Plan54

Employee Stock Ownership Plans - Additional Information (Detail) - USD ($)	Dec. 11, 2015	Dec. 20, 2013	Aug. 07, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued				23,369,838	23,184,852
Shares issued for 2014 Equity Plan				382,033
Aggregate value of restricted stock issuance	$ 2,000,000
Number of comparable companies for expected volatility				The estimated volatility reflects the incorporation of the historical volatility of comparable companies with publicly available share prices. In 2016, 2015 and 2014, the expected volatility is based on the weighted average volatility of up to 15 companies with business, financial and market attributes that the Company believes are similar to its own.
Expected dividend yield				0.00%	0.00%	0.00%
2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance				2,652,658
Increased number of shares available for future grant				2,817,106
Expected volatility		97.40%	96.80%
Unrecognized compensation cost related to nonvested options grants				$ 3,000,000
2001 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance				92,987
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding				682,085	417,126
Total shares vested				155,707
Restricted Stock Units [Member] | Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				1 year
Restricted Stock Units [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issue of stock-based awards	78,125
Restricted Stock Units [Member] | 2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				3 years
Issue of stock-based awards				429,803
Unrecognized compensation cost related to nonvested options grants				$ 2,300,000
Unrecognized compensation cost period for recognition				1 year 8 months 1 day
Restricted Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding				153,277
Restricted Common Stock [Member] | 2014 Equity Plan [Member] | Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				1 year
Common stock, shares issued				75,152
Stock-based award fair value				$ 400,000
Non-Qualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued for 2014 Equity Plan	84,745
Non-Qualified Stock Options [Member] | Common Stock Price Target Achievements Conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued for 2014 Equity Plan	370,181
Non-Qualified Stock Options [Member] | 2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				3 years
Shares issued for 2014 Equity Plan				278,440
Non-Qualified Stock Options [Member] | 2014 Equity Plan [Member] | Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued				103,593
Stock-based award fair value				$ 200,000
Service Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested options grants				$ 3,000,000
Unrecognized compensation cost period for recognition				1 year 11 months 19 days
Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost period for recognition				11 months 19 days
Restricted Stock and Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding				757,147
Total intrinsic values				$ 600,000	$ 500,000	$ 0
Total shares vested				78,125	0	0
Share based compensation recorded in conjunction with award				$ 0
Restricted Stock Awards [Member] | 2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested options grants				$ 200,000
Unrecognized compensation cost period for recognition				5 months 23 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period	3 years
Minimum [Member] | Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				3 years
Minimum [Member] | Restricted Stock Units [Member] | 2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				3 years
Minimum [Member] | Non-Qualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period	3 years
Minimum [Member] | Service Based Awards [Member] | 2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				3 years
Minimum [Member] | Performance-Based Awards [Member] | 2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				3 years
Maximum [Member] | Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				4 years
Maximum [Member] | Restricted Stock Units [Member] | 2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				4 years
Maximum [Member] | Non-Qualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period	5 years
Maximum [Member] | Service Based Awards [Member] | 2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				4 years
Maximum [Member] | Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested options grants				$ 100,000
Maximum [Member] | Performance-Based Awards [Member] | 2014 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based award vesting period				4 years

Employee Stock Ownership Plan55

Employee Stock Ownership Plans - Summary of Stock Based Compensation Included in Cost of Sales or Operating Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	$ 5,313	$ 5,413	$ 8,781
Cost of Product Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	796	824	1,121
Research and Development Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	594	666	1,046
Sales and Marketing Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	1,066	1,012	1,390
General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	$ 2,857	$ 2,911	$ 5,224

Employee Stock Ownership Plan56

Employee Stock Ownership Plans - Summary of Fair Value of Option Awards Estimated by Use of Black-Scholes Option Pricing Model (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Weighted average assumptions:
Expected term (in years)	5 years 10 months 10 days	6 years 7 days	6 years 2 months 1 day
Expected volatility	53.56%	57.95%	50.09%
Risk free rate	1.36%	1.79%	1.94%
Expected dividend yield	0.00%	0.00%	0.00%
Weighted average fair value:
Grant-date fair value of options granted	$ 2.16	$ 3.82	$ 5.37
Grant-date fair value of options vested	$ 7.58	$ 11.89	$ 97.33
Aggregate intrinsic value of options exercised			$ 4,816,500

Employee Stock Ownership Plan57

Employee Stock Ownership Plans - Summary of Stock Option Outstanding (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Beginning Balance	1,702,337
Number of Shares, Granted	382,033
Number of Shares, Forfeited	(20,796)
Number of Shares, Ending Balance	2,063,574	1,702,337
Number of Shares, Exercisable at December 31, 2016	707,260
Number of Shares, Expected to vest at December 31, 2016	1,190,710
Weighted Average Grant Date Fair Value Per Share, Beginning Balance	$ 9.60
Weighted Average Grant Date Fair Value Per Share, Granted	2.16	$ 3.82	$ 5.37
Weighted Average Grant Date Fair Value Per Share, Forfeited	6.62
Weighted Average Grant Date Fair Value Per Share, Ending Balance	8.26	9.60
Weighted Average Grant Date Fair Value Per Share, Exercisable at December 31, 2016	17.10
Weighted Average Grant Date Fair Value Per Share, Expected to vest at December 31, 2016	3.58
Weighted Average Exercise Price Per Share, Beginning Balance	13.47
Weighted Average Exercise Price Per Share, Granted	4.30
Weighted Average Exercise Price Per Share, Forfeited	10.58
Weighted Average Exercise Price Per Share, Ending Balance	11.80	$ 13.47
Weighted Average Exercise Price Per Share, Exercisable at December 31, 2016	19.81
Weighted Average Exercise Price Per Share, Expected to vest at December 31, 2016	$ 6.99
Weighted Average Remaining Contractual Term, Beginning Balance	8 years 3 months 18 days	9 years 29 days
Weighted Average Remaining Contractual Term, Exercisable at December 31, 2016	7 years 8 months 5 days
Weighted Average Remaining Contractual Term, Expected to vest at December 31, 2016	8 years 8 months 1 day
Aggregate Intrinsic Value, Beginning Balance	$ 6,152,000
Aggregate Intrinsic Value, Exercised			$ 4,816,500
Aggregate Intrinsic Value, Ending Balance	36,326,000	$ 6,152,000
Aggregate Intrinsic Value, Expected to vest at December 31, 2016	$ 31,473,000

Employee Stock Ownership Plan58

Employee Stock Ownership Plans - Summary of Grants of RSUs (Detail) - Restricted Stock Units [Member]	12 Months Ended
	Dec. 31, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Units, Beginning Balance | shares	417,126
Restricted Stock Units, Granted | shares	429,803
Restricted Stock Units, Vested | shares	(155,707)
Restricted Stock Units, Forfeited | shares	(9,137)
Restricted Stock Units, Ending Balance | shares	682,085
Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 9.01
Weighted Average Grant Date Fair Value, Granted | $ / shares	4.04
Weighted Average Grant Date Fair Value, Vested | $ / shares	9.20
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	9.37
Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 5.83

Net Loss Per Share - Computatio

Net Loss Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerator:
Net loss	$ (5,742)	$ (3,097)	$ (1,387)	$ (1,797)	$ 1,638	$ (2,522)	$ (2,743)	$ (2,790)	$ (12,023)	$ (6,417)	$ (66,324)
Denominator:
Weighted average shares outstanding, basic and diluted									23,139,807	22,986,931	12,349,456
Net income (loss) per share basic and diluted	$ (0.25)	$ (0.13)	$ (0.06)	$ (0.08)	$ 0.07	$ (0.11)	$ (0.12)	$ (0.12)	$ (0.52)	$ (0.28)	$ (5.37)

Net Loss Per Share - Summary of

Net Loss Per Share - Summary of Potential Dilutive Common Shares Excluded from Computation of Diluted Net Loss Per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive Securities	2,899,051	2,251,724	1,341,281
Common Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive Securities	2,063,574	1,702,337	1,026,510
Restricted Common Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive Securities	682,085	417,126	314,640
Common Stock Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive Securities	115	131	131
Restricted Common Stock Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive Securities	153,277	132,130

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation Between U.S. Statutory Income Tax Rate and Company's Effective Rate (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S. federal income tax statutory rate	35.00%	35.00%	35.00%
Permanent differences	(4.00%)	(11.00%)
State tax, net of federal benefit	(1.00%)	(6.00%)
Changes in valuation allowance for deferred tax assets	(30.00%)	(11.00%)	1.00%
Stock-based compensation	(1.00%)	(8.00%)
Debt and warrant fair value adjustments			(26.00%)
Write down of losses not previously benefitted			(11.00%)
Other	1.00%	1.00%	(1.00%)
Effective tax rate	0.00%	0.00%	0.00%

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Net operating loss carryforwards	$ 66,276	$ 62,671
Stock-based compensation	6,140	4,938
Tax credit carryforwards	312	323
Reserves and accruals	398	140
Intangible assets and amortization	95	150
Total gross deferred tax assets	73,221	68,222
Deferred tax liabilities:
Depreciation	(5,295)	(3,841)
Total deferred tax liabilities	(5,295)	(3,841)
Total deferred tax assets and liabilities	67,926	64,381
Valuation allowance	(67,926)	(64,381)
Net deferred tax asset	$ 0	$ 0

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Net change in valuation allowance	$ 3,500,000
Net operating loss carryforwards	$ 113,200,000
Net operating loss carryforwards expiration date	Jun. 30, 2019
Built-in gain tax existed at the date of the ownership change	$ 42,000,000
Built-in gains triggered period	5 years
Built-in gains change in ownership period	5 years
Net operating losses	$ 42,000,000
Net operating losses available to offset future state taxable income expiration description	Between 2017 and 2036
Unrecognized tax benefits	$ 0	$ 0	$ 0
Interest and penalties related to unrecognized tax benefits	0	0	0
Expected amount of unrecognized tax benefits	0	$ 0	$ 0
Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	$ 176,300,000
Net operating loss carryforwards expiration date	Dec. 31, 2036
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	$ 97,100,000

Quarterly Results of Operatio64

Quarterly Results of Operations - Summary of Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 27,639	$ 29,560	$ 27,718	$ 32,821	$ 37,384	$ 31,539	$ 30,096	$ 23,500	$ 117,738	$ 122,518	$ 102,399
Gross profit	3,729	6,402	6,653	6,527	9,852	5,172	5,109	4,514	23,311	24,648	17,080
Income (loss) from operations	(5,710)	(2,404)	(1,348)	(1,758)	1,684	(2,476)	(2,689)	(2,745)	(11,220)	(6,235)	(16,043)
Net income (loss)	$ (5,742)	$ (3,097)	$ (1,387)	$ (1,797)	$ 1,638	$ (2,522)	$ (2,743)	$ (2,790)	$ (12,023)	$ (6,417)	$ (66,324)
Net income (loss) per share basic and diluted	$ (0.25)	$ (0.13)	$ (0.06)	$ (0.08)	$ 0.07	$ (0.11)	$ (0.12)	$ (0.12)	$ (0.52)	$ (0.28)	$ (5.37)

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts (Detail) - Allowances for Uncollectible Accounts and Sales Returns and Allowances [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 89	$ 120	$ 209
Charges to Costs and Expenses	0	0	0
Deductions to Allowances for Uncollectible Accounts	0	0	0
Charges to (Deductions from) Other Accounts	4	(31)	(89)
Balance at End of Year	$ 93	$ 89	$ 120