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The Company and Summary of Significant Accounting Policies | 9 Months Ended | 12 Months Ended
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Sep. 30, 2017 | Dec. 31, 2016
The Company and Summary of Significant Accounting Policies |  |
The Company and Summary of Significant Accounting Policies | MOSYS, INC. NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) Note 1. The Company and Summary of Significant Accounting Policies MoSys, Inc. (the Company) was incorporated in California in September 1991, and reincorporated in September 2000 in Delaware. The Company’s strategy and primary business objective is to be an intellectual property (IP)-rich fabless semiconductor company focused on the development and sale of integrated circuit (IC) products. The Company’s solutions deliver time-to-market, performance, power, area and economic benefits for system original equipment manufacturers. The Company has developed two families of ICs under the Bandwidth Engine® and LineSpeed™ product names. Bandwidth Engine ICs combine the Company’s proprietary 1T-SRAM® high-density embedded memory, integrated macro functions and high-speed serial interface with its intelligent access technology and a highly efficient interface protocol. The LineSpeed IC product line is comprised of non-memory, high-speed serial interface devices with clock data recovery, gearbox and retimer functionality, which convert lanes of data received on line cards or by optical modules into different configurations and/or ensure signal integrity. In the quarter ended September 30, 2017, the Company notified its customers that it intends to discontinue the LineSpeed IC product line. The Company is currently supporting existing LineSpeed IC customers and accepting last-time product orders. Going forward, the Company expects to focus all of our efforts on the Bandwidth Engine IC product line. Historically, the Company’s primary business was the design, development, marketing, sale and support of differentiated IP, including embedded memory and high-speed parallel and SerDes I/O used in advanced systems-on-chips. The Company’s future success and ability to achieve and maintain profitability depends on its success in developing a market for its ICs. The accompanying condensed consolidated financial statements of the Company have been prepared on a basis that assumes that the Company will continue as a going concern and contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business and have been prepared without audit in accordance with the rules and regulations of the Securities and Exchange Commission (SEC). The condensed consolidated balance sheet as of December 31, 2016 has been derived from the audited consolidated financial statements at that date. Certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted in accordance with these rules and regulations. The information in this report should be read in conjunction with the Company’s consolidated financial statements and notes thereto included in its most recent annual report on Form 10-K filed with the SEC. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) necessary to summarize fairly the Company’s financial position, results of operations and cash flows for the interim periods presented. The operating results for the the three and nine months ended September 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017 or for any other future period. Liquidity The Company incurred a net loss of $10.1 million for the nine months ended September 30, 2017 and had an accumulated deficit of $224.2 million as of September 30, 2017. In addition, the Company incurred net losses of approximately $32.0 million and $31.5 million for the years ended December 31, 2016 and 2015, respectively. These and prior year losses have resulted in significant negative cash flows for almost a decade and have required the Company to raise substantial amounts of additional capital. To date, the Company has primarily financed its operations through multiple offerings of common stock to investors and affiliates, as well as asset sale transactions. In March 2016, the Company entered into a 10% Senior Secured Convertible Note Purchase Agreement with the purchasers of $8.0 million principal amount of 10% Senior Secured Convertible Notes due August 15, 2018 (the Notes), at par, in a private placement transaction. The Notes bear interest at the annual rate of 10%. Accrued interest is payable semi-annually in cash or in-kind through the issuance of identical new Notes, or with a combination of the two, at the Company’s option. Since issuance of the Notes, the Company has made the interest payments in-kind through the issuance of additional notes totaling approximately $1.2 million. Further, the Notes restrict the ability of the Company to incur any indebtedness for borrowed money, unless such indebtedness by its terms is expressly subordinated to the Notes in right of payment and to the security interest of the Note holder(s) in respect to the priority and enforcement of any security interest in property of the Company securing such new debt; provided that the Note holder(s) security interest and cash payment rights under the Notes shall be subordinate to a maximum of $5 million of indebtedness for a secured accounts receivable line of credit facility under certain conditions (See Note 8). The Notes are payable in full in August 2018. The Company expects to continue to incur operating losses for the foreseeable future as it secures customers for and continues to invest in the commercialization of its IC products. The Company will need to increase revenues substantially beyond levels that it has attained in the past in order to generate sustainable operating profit and sufficient cash flows to continue doing business without raising additional capital from time to time. As a result of the Company’s expected operating losses and cash burn for the foreseeable future, recurring losses from operations, and the need to repay the Notes and accrued interest in 2018, if the Company is unable to raise sufficient capital through additional debt or equity arrangements, there will be uncertainty regarding the Company’s ability to maintain liquidity sufficient to operate its business effectively, which raises substantial doubt as to the Company’s ability to continue as a going concern within one year from the date of issuance of these condensed consolidated financial statements. These condensed consolidated financial statements do not include any adjustments that might result from this uncertainty. There can be no assurance that such additional capital, whether in the form of debt or equity financing, will be sufficient or available and, if available, that such capital will be offered on terms and conditions acceptable to the Company. As further discussed in Note 10, in April 2017, the Company initiated restructuring activities and has effected reductions in its workforce and associated operating expenses, net loss and cash burn as part of its efforts to sustain its business. The Company’s primary focus is producing and selling its Bandwidth Engine products, and it has substantially curtailed new product development. If the Company is unsuccessful in these efforts, it will need to implement additional cost reduction strategies, which could further affect its near- and long-term business plan. These efforts may include, but are not limited to, further reducing headcount and curtailing business activities. Basis of Presentation The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The Company’s fiscal year ends on December 31 of each calendar year. Use of Estimates The preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses recognized during the reported period. Actual results could differ from those estimates. Cash Equivalents and Investments The Company has invested its excess cash in money market accounts, certificates of deposit, commercial paper, corporate debt, government-sponsored enterprise bonds and municipal bonds and considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. Investments with original maturities greater than three months and remaining maturities less than one year are classified as short-term investments. Investments with remaining maturities greater than one year are classified as long-term investments. Management generally determines the appropriate classification of securities at the time of purchase. All securities are classified as available-for-sale. The Company’s available-for-sale short-term investments are carried at fair value, with the unrealized holding gains and losses reported in accumulated other comprehensive loss. Realized gains and losses and declines in the value judged to be other than temporary are included in the other income, net line item in the condensed consolidated statements of operations and comprehensive loss. The cost of securities sold is based on the specific identification method. Fair Value Measurements The Company measures the fair value of financial instruments using a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels: Level 1— Inputs used to measure fair value are unadjusted quoted prices that are available in active markets for the identical assets or liabilities as of the reporting date. Level 2— Pricing is provided by third party sources of market information obtained through the Company’s investment advisors, rather than models. The Company does not adjust for, or apply, any additional assumptions or estimates to the pricing information it receives from advisors. The Company’s Level 2 securities include cash equivalents and available-for-sale securities, which consist primarily of certificates of deposit, corporate debt, and government agency and municipal debt securities from issuers with high-quality credit ratings. The Company’s investment advisors obtain pricing data from independent sources, such as Standard & Poor’s, Bloomberg and Interactive Data Corporation, and rely on comparable pricing of other securities because the Level 2 securities are not actively traded and have fewer observable transactions. The Company considers this the most reliable information available for the valuation of the securities. Level 3— Unobservable inputs that are supported by little or no market activity and reflect the use of significant management judgment are used to measure fair value. These values are generally determined using pricing models for which the assumptions utilize management’s estimates of market participant assumptions. The determination of fair value for Level 3 investments and other financial instruments involves the most management judgment and subjectivity. Allowance for Doubtful Accounts The Company establishes an allowance for doubtful accounts to ensure that its trade receivables balances are not overstated due to uncollectibility. The Company performs ongoing customer credit evaluations within the context of the industry in which it operates and generally does not require collateral from its customers. A specific allowance of up to 100% of the invoice value is provided for any problematic customer balances. Delinquent account balances are written off after management has determined that the likelihood of collection is remote. The Company grants credit only to customers deemed creditworthy in the judgment of management. There was no allowance for doubtful accounts receivable at either September 30, 2017 or December 31, 2016. Inventory The Company values its inventories at the lower of cost, which approximates actual cost on a first-in, first-out basis, or net realizable value. The Company records inventory reserves for estimated obsolescence or unmarketable inventories based upon assumptions about future demand and market conditions. Once a reserve is established, it is maintained until the product to which it relates is sold or otherwise disposed of. If actual market conditions are less favorable than those expected by management, additional adjustment to inventory valuation may be required. Charges for obsolete and slow moving inventories are recorded based upon an analysis of specific identification of obsolete inventory items and quantification of slow moving inventory items. The Company recorded no inventory write-downs during three or nine months ended September 30, 2017 or 2016. Revenue Recognition General The Company generates revenue from the sales of IC products and licensing of its IP. The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery or performance has occurred, the sales price is fixed or determinable, and collectibility is reasonably assured. Evidence of an arrangement generally consists of signed agreements or customer purchase orders. IC products The Company sells products both directly to customers, as well as through distributors. Revenue from sales directly to customers is generally recognized at the time of shipment. The Company may record an estimated allowance, at the time of shipment, for future returns and other charges against revenue consistent with the terms of sale. IC product revenue and costs relating to sales made through distributors with rights of return or stock rotation are generally deferred until the distributors sell the product to end customers due to the Company’s inability to estimate future returns and credits to be issued. Distributors are generally able to return up to 10% of their purchases for slow, non-moving or obsolete inventory for credit every six months. At the time of shipment to distributors, an accounts receivable for the selling price is recorded, as there is a legally enforceable right to receive payment, and inventory is relieved, as legal title to the inventory is transferred upon shipment. Revenues are recognized upon receiving notification from the distributors that products have been sold to end customers. Distributors provide information regarding products and quantity, end customer shipments and remaining inventory on hand. The associated deferred margin is included in the accrued expenses and other line item in the condensed consolidated balance sheets. Royalty The Company’s licensing contracts typically provide for royalties based on the licensee’s use of the Company’s memory technology in their currently shipping commercial products. The Company recognizes royalties in the quarter in which it receives the licensee’s report. Cost of Net Revenue Cost of net revenue consists primarily of direct and indirect costs of IC product sales and engineering personnel costs directly related to maintenance and support services specified in licensing agreements. Maintenance and support typically include engineering support to assist in the commencement of production of a licensee’s products. Goodwill In January 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-04, Simplifying the Test for Goodwill Impairment (ASU No. 2017-04), which eliminates step 2, the computation of the implied fair value of goodwill to determine the amount of impairment, from the goodwill impairment test. In computing the implied fair value of goodwill for step 2 under current accounting standards, the Company calculates the fair value of its assets and liabilities (including unrecognized assets and liabilities) as if acquired or assumed in a business combination. Under the amendments in this update, the Company will determine the amount of goodwill impairment, by comparing the fair value of the reporting unit with its carrying amount. To the extent the carrying value of a reporting unit exceeds its fair value, a goodwill impairment charge is recognized. ASU No. 2017-04 is effective for the Company for annual and interim impairment tests beginning January 1, 2020 with early adoption permitted. The Company has elected to early adopt the new standard effective January 1, 2017, because the ASU significantly simplifies the evaluation of goodwill for impairment. The Company has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. As the Company uses the market approach to determine the step one fair value, the price of its common stock is an important component of the fair value calculation. If the Company’s stock price continues to experience significant price and volume fluctuations, this will impact the fair value of the reporting unit, which can lead to potential impairment in future periods. The Company reviews goodwill for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. The Company first assesses qualitative factors to determine whether it is more-likely-than-not that the fair value of the reporting unit is less than the carrying amount as a basis for determining whether it is necessary to perform an impairment test. If the qualitative assessment warrants further analysis, the Company compares the fair value of the reporting unit to its carrying value. The fair value of the reporting unit is determined using the market approach. If the fair value of the reporting unit exceeds the carrying value of net assets of the reporting unit, goodwill is not impaired. If the carrying value of the reporting unit’s goodwill exceeds its fair value, then the Company must record an impairment charge equal to the difference. The Company performed its annual test for goodwill impairment as of September 1, 2017, and performed a subsequent test on September 30, 2017. In both tests, the Company’s fair value exceeded its carrying value of net assets and, as such, there was no additional impairment of goodwill. Reverse Stock Split On February 14, 2017, the Company filed a certificate of amendment to its amended and restated certificate of incorporation with the Secretary of State of the State of Delaware to effect a one-for-ten reverse stock split of the Company’s shares of common stock. Such amendment and ratio were previously approved by the Company’s stockholders and board of directors, respectively. On February 16, 2017, the Company effected the one-for-ten reverse stock split. As a result of the reverse stock split, every ten shares of the Company’s pre-reverse split outstanding common stock was combined and reclassified into one share of common stock. Proportionate voting rights and other rights of common stock holders were not affected by the reverse stock split. No fractional shares were issued in connection with the reverse stock split; stockholders who would otherwise hold a fractional share of common stock received cash in an amount equal to the product obtained by multiplying (i) the closing sale price of the Company’s common stock on the effective date of the reverse stock split, by (ii) the number of shares of the Company’s common stock held by the stockholder that would otherwise have been exchanged for the fractional share interest. All stock options and restricted stock units outstanding and common stock reserved for issuance under the Company’s equity incentive plans immediately prior to the reverse stock split were adjusted by dividing the number of affected shares of common stock by 10 and, as applicable, multiplying the exercise price by 10, as a result of the reverse stock split. The common stock par value was adjusted to $0.001 in conjunction with the reverse stock split. Per Share Amounts Basic net loss per share is computed by dividing net loss for the period by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share gives effect to all potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of incremental shares of common stock issuable upon the exercise of stock options, vesting of stock awards and purchases under the employee stock purchase plan. The following table sets forth securities outstanding which were excluded from the computation of diluted net loss per share as their inclusion would be anti-dilutive (in thousands):
|  | September 30, |
|  | 2017 |  | 2016 |
Options outstanding to purchase common stock |  | 248 |  | 558 |
Employee stock purchase plan |  | — |  | 47 |
Unvested restricted common stock units |  | 385 |  | 150 |
Convertible debt |  | 1,021 |  | 926 |
Outstanding warrants |  | 663 |  | — |
Total |  | 2,317 |  | 1,681 |
Comprehensive Loss Comprehensive loss includes unrealized gains and losses on available-for-sale securities. Realized gains and losses on available-for-sale securities are reclassified from accumulated other comprehensive loss and included in other income, net in the condensed consolidated statements of operations and comprehensive loss. All amounts recorded in the three and nine months ended September 30, 2017 and 2016 were not considered significant. Debt Issuance Costs Debt issuance costs are capitalized and amortized to interest expense using the effective interest method. Unamortized debt issuances costs are presented in the condensed consolidated balance sheets as a direct deduction from the carrying amount of the related debt liability and accounted for as debt discounts. | MOSYS, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS Note 1: The Company and Summary of Significant Accounting Policies The Company MoSys, Inc. (the Company) was incorporated in California in September 1991, and reincorporated in September 2000 in Delaware. The Company’s strategy and primary business objective is to be an IP-rich fabless semiconductor company focused on the development and sale of integrated circuit (IC) products. Prior to 2011, the Company’s primary business activities were designing, developing, marketing and licensing high-performance semiconductor memory and high-speed parallel and serial interface, or SerDes, intellectual property (IP) used by the semiconductor industry and communications, networking and storage equipment manufacturers. Since 2011, the Company has developed two IC product lines under the “Bandwidth Engine” and “LineSpeed” product names. Bandwidth Engine ICs combine the Company’s proprietary high-density embedded memory with its high-speed 10 gigabits per second and higher interface technology. The LineSpeed IC product line is comprised of non-memory based, high-speed SerDes devices with gearbox or retimer functionality that convert lanes of data received on line cards or by optical modules into different configurations and/or ensure signal integrity. Both product lines are being marketed to networking and communications systems companies. The Company’s future success and ability to achieve and maintain profitability depends on its success in developing a market for its ICs. The accompanying consolidated financial statements of the Company have been prepared on a basis that assumes that the Company will continue as a going concern and contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. Liquidity In December 2016, the Company adopted Financial Accounting Standards Board (FASB) Accounting Standard Update (ASU) No. 2014-15 (ASU 2014-15), Going Concern. ASU 2014-15 requires management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued. If management identifies conditions or events that raise substantial doubt about an entity’s ability to continue as a going concern, management must consider if there are plans that are probable to be implemented, and whether it is probable that the plans will mitigate the conditions or events raising the substantial doubt about the entity’s ability to continue as a going concern. If the substantial doubt is not alleviated after consideration of management’s plans, the entity must include a statement in the notes to the financial statements indicating that there is substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued including: 1) the principal conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern, 2) management’s evaluation of the significance of those conditions or events in relation to the entity’s ability to meet its obligations, and 3) management’s plans to attempt to mitigate the conditions or events causing the substantial doubt about the entity’s ability to continue as a going concern. The Company incurred net losses of approximately $32.0 million and $31.5 million for the years ended December 31, 2016 and 2015, respectively, and had an accumulated deficit of approximately $214.0 million as of December 31, 2016. These and prior year losses have resulted in significant negative cash flows for almost a decade and have required the Company to raise substantial amounts of additional capital during this period. To date, the Company has primarily financed its operations through multiple offerings of common stock to investors and affiliates, as well as asset sale transactions. In March 2016, the Company entered into a 10% Senior Secured Convertible Note Purchase Agreement with the purchasers of $8.0 million principal amount of 10% Senior Secured Convertible Notes due August 15, 2018 (the Notes), at par, in a private placement transaction. The Notes bear interest at the annual rate of 10%. Accrued interest is payable semi-annually in cash or in-kind through the issuance of identical new Notes, or with a combination of the two, at the Company’s option. As of February 15, 2017, the Company has made the interest payments in-kind through the issuance of additional notes totaling approximately $0.8 million. Further, the Notes restrict the ability of the Company to incur any indebtedness for borrowed money, unless such indebtedness by its terms is expressly subordinated to the Notes in right of payment and to the security interest of the Note holder(s) in respect to the priority and enforcement of any security interest in property of the Company securing such new debt; provided that the Note holder(s) security interest and cash payment rights under the Notes shall be subordinate to a maximum of $5 million of indebtedness for a secured accounts receivable line of credit facility under certain conditions. (See Note No. 11, Convertible Notes) The Company expects to continue to incur operating losses for the foreseeable future as it secures customers for and continues to invest in the commercialization of its IC products. Due to the strong commitment of the Company’s resources to research and development and expansion of its product offerings to customers, the Company will need to increase revenues substantially beyond levels that it has attained in the past in order to generate sustainable operating profit and sufficient cash flows to continue doing business without raising additional capital from time to time. As a result of the Company’s expected operating losses and cash burn for the foreseeable future, recurring losses from operations, and the need to repay the Notes and accrued interest in 2018, if the Company is unable to raise sufficient capital through additional debt or equity arrangements, there will be uncertainty regarding the Company’s ability to maintain liquidity sufficient to operate its business effectively, which raises substantial doubt as to the Company’s ability to continue as a going concern within one year from the date of issuance of these consolidated financial statements. These consolidated financial statements do not include any adjustments that might result from this uncertainty. There can be no assurance that such additional capital, whether in the form of debt or equity financing, will be sufficient or available and, if available, that such capital will be offered on terms and conditions acceptable to the Company. T he Company is exploring various alternatives, and expects to implement cost reductions to successfully sustain the business. If the Company is unsuccessful in these efforts, it will need to implement significant cost reduction strategies that could affect its near- and long-term business plan. These efforts may include, but are not limited to reducing headcount and curtailing business activities, especially around new product development. Basis of Presentation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The Company’s fiscal year ends on December 31 of each calendar year. Reverse Stock Split On February 16, 2017, the Company effected a one-for-10 reverse stock split of its common stock. As a result of the reverse stock split, every ten shares of the Company’s pre-reverse split outstanding common stock was combined and reclassified into one share of common stock. Proportionate voting rights and other rights of common stock holders were not affected by the reverse stock split. No fractional shares were issued in connection with the reverse stock split; stockholders who would otherwise hold a fractional share of common stock received cash in an amount equal to the product obtained by multiplying (i) the closing sale price of the Company’s common stock on the effective date of the reverse stock split, by (ii) the number of shares of the Company’s common stock held by the stockholder that would otherwise have been exchanged for the fractional share interest. All stock options and restricted stock units outstanding and common stock reserved for issuance under the Company’s equity incentive plans immediately prior to the reverse stock split were adjusted by dividing the number of affected shares of common stock by 10 and, as applicable, multiplying the exercise price by 10, as a result of the reverse stock split. The common stock par value was adjusted to $0.001 in conjunction with the reverse stock split. All of the share numbers, share prices, and exercise prices have been adjusted, on a retroactive basis to reflect this 1-for-10 reverse stock split. Use of Estimates The preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses recognized during the reported period. Actual results could differ from those estimates. Foreign Currency The functional currency of the Company’s foreign entities is the U.S. dollar. The financial statements of these entities are translated into U.S. dollars and the resulting gains or losses are included in other income, net in the consolidated statements of operations and comprehensive loss. Such gains and losses were not material for any period presented. Cash Equivalents and Investments The Company has invested its excess cash in money market accounts, certificates of deposit, corporate debt, government-sponsored enterprise bonds and municipal bonds and considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. Investments with original maturities greater than three months and remaining maturities less than one year are classified as short-term investments. Investments with remaining maturities greater than one year are classified as long-term investments. Management generally determines the appropriate classification of securities at the time of purchase. All securities are classified as available-for-sale. The Company’s available-for-sale short-term and long-term investments are carried at fair value, with the unrealized holding gains and losses reported in accumulated other comprehensive loss. Realized gains and losses and declines in the value judged to be other-than-temporary are included in the other income, net line item in the consolidated statements of operations and comprehensive loss. The cost of securities sold is based on the specific identification method. Fair Value Measurements The Company measures the fair value of financial instruments using a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels: Level 1—Inputs used to measure fair value are unadjusted quoted prices that are available in active markets for the identical assets or liabilities as of the reporting date. Level 2—Pricing is provided by third party sources of market information obtained through the Company’s investment advisors, rather than models. The Company does not adjust for, or apply, any additional assumptions or estimates to the pricing information it receives from advisors. The Company’s Level 2 securities include cash equivalents and available-for-sale securities, which consisted primarily of certificates of deposit, corporate debt, and government agency and municipal debt securities from issuers with high-quality credit ratings. The Company’s investment advisors obtain pricing data from independent sources, such as Standard & Poor’s, Bloomberg and Interactive Data Corporation, and rely on comparable pricing of other securities because the Level 2 securities are not actively traded and have fewer observable transactions. The Company considers this the most reliable information available for the valuation of the securities. Level 3—Unobservable inputs that are supported by little or no market activity and reflect the use of significant management judgment are used to measure fair value. These values are generally determined using pricing models for which the assumptions utilize management’s estimates of market participant assumptions. The determination of fair value for Level 3 investments and other financial instruments involves the most management judgment and subjectivity. Allowance for Doubtful Accounts The Company establishes an allowance for doubtful accounts to ensure that its trade receivables balances are not overstated due to uncollectibility. The Company performs ongoing customer credit evaluations within the context of the industry in which it operates and generally does not require collateral from its customers. A specific allowance of up to 100% of the invoice value is provided for any problematic customer balances. Delinquent account balances are written off after management has determined that the likelihood of collection is remote. The Company grants credit only to customers deemed creditworthy in the judgment of management. There was no allowance for doubtful accounts receivable at December 31, 2016 and 2015. Inventory The Company values its inventories at the lower of cost, which approximates actual cost on a first-in, first-out basis, or market value. The Company records inventory reserves for estimated obsolescence or unmarketable inventories based upon assumptions about future demand and market conditions. Once a reserve is established, it is maintained until the product to which it relates is sold or otherwise disposed of. If actual market conditions are less favorable than those expected by management, additional adjustment to inventory valuation may be required. Charges for obsolete and slow moving inventories are recorded based upon an analysis of specific identification of obsolete inventory items and quantification of slow moving inventory items. The Company recorded no inventory reserves during the years ended December 31, 2016 and 2014, and inventory reserves of $0.3 million during the year ended December 31, 2015. Property and Equipment Property and equipment are originally recorded at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, generally three to five years. Depreciation is recorded in operating expenses in the consolidated statements of operations and comprehensive loss. Leasehold improvements and assets acquired through capital leases are amortized over the shorter of their estimated useful life or the lease term and are recorded with depreciation expense in the consolidated statements of operations and comprehensive loss. Valuation of Long-lived Assets The Company evaluates the recoverability of long-lived assets with finite lives whenever events or changes in circumstances occur that indicate that the carrying value of the asset or asset group may not be recoverable. Finite-lived intangible assets are being amortized on a straight-line basis over their estimated useful lives of three to seven years. An impairment charge is recognized as the difference between the net book value of such assets and the fair value of such assets at the date of measurement. The measurement of impairment requires management to estimate future cash flows and the fair value of long-lived assets. Intangible Assets Intangible assets acquired in business combinations, referred to as purchased intangible assets, are accounted for based on the fair value of assets purchased and are amortized over the period in which economic benefit is estimated to be received. Goodwill The Company reviews goodwill for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. The Company first assesses qualitative factors to determine whether it is more-likely-than-not that the fair value of the reporting unit is less than the carrying amount as a basis for determining whether it is necessary to perform the two-step impairment test. If the qualitative assessment warrants further analysis, the Company compares the fair value of the reporting unit to its carrying value. The fair value of the reporting unit is determined using the market approach. If the fair value of the reporting unit exceeds the carrying value of net assets of the reporting unit, goodwill is not impaired, and the Company is not required to perform further testing. If the carrying value of the reporting unit’s goodwill exceeds its implied fair value, then the Company must record an impairment charge equal to the difference. The Company has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. As the Company uses the market approach to assess impairment in the second step of the analysis, the price of its common stock is an important component of the fair value calculation. If the Company’s stock price continues to experience significant price and volume fluctuations, this will impact the fair value of the reporting unit, which can lead to potential impairment in future periods. The Company performed step one of the annual impairment test in September 2016, and concluded no factors indicated impairment of goodwill. During the fourth quarter of 2016, the Company concluded a triggering event had occurred due to a sustained decrease in the price per share of its common stock and related reduced market capitalization. The Company performed the first step of the impairment test to identify potential goodwill impairment, and the test results indicated the goodwill carrying value was greater than its fair value. The Company then performed a step-two analysis to compare the carrying amount of goodwill to the implied fair value of the goodwill, and the Company determined the estimated fair values of the assets and liabilities of its single reporting unit. The fair values of the assets and liabilities identified in the impairment test were determined using the combination of the income approach and the market approach. The implied fair value of goodwill was measured as the excess of the fair value of the Company’s single reporting unit over the fair value of its assets and liabilities. As a result of the step-two test, the Company recorded a non-cash impairment charge of $9.9 million during the fourth quarter of 2016. Revenue Recognition General The Company generates revenue from the sales of IC products and licensing of its IP. The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery or performance has occurred, the sales price is fixed or determinable, and collectibility is reasonably assured. Evidence of an arrangement generally consists of signed agreements or customer purchase orders. IC products The Company sells products both directly to customers, as well as through distributors. Revenue from sales directly to customers is generally recognized at the time of shipment. The Company may record an estimated allowance, at the time of shipment, for future returns and other charges against revenue consistent with the terms of sale. IC product revenue and costs relating to sales made through distributors with rights of return or stock rotation are generally deferred until the distributors sell the product to end customers due to the Company’s inability to estimate future returns and credits to be issued. Distributors are generally able to return up to 10% of their purchases for slow, non-moving or obsolete inventory for credit every six months. At the time of shipment to distributors, an accounts receivable for the selling price is recorded, as there is a legally enforceable right to receive payment, and inventory is relieved, as legal title to the inventory is transferred upon shipment. Revenues are recognized upon receiving notification from the distributors that products have been sold to end customers. Distributors provide information regarding products and quantity, end customer shipments and remaining inventory on hand. The associated deferred margin is included in the accrued expenses and other line item in the consolidated balance sheets. Royalty The Company’s licensing contracts typically also provide for royalties based on the licensees’ use of the Company’s memory technology in their currently shipping commercial products. The Company recognizes royalties in the quarter in which it receives the licensees’ reports. Licensing Licensing revenue consists of fees earned from license agreements, development services and support and maintenance. For stand-alone license agreements or license deliverables in multi-deliverable arrangements that do not require significant development, modification or customization, revenues are recognized when all revenue recognition criteria have been met. Delivery of the licensed technology is typically the final revenue recognition criterion met, at which time revenue is recognized. If any of the criteria are not met, revenue recognition is deferred until such time as all criteria have been met. Support and maintenance revenue is recognized ratably over the period during which the obligation exists, typically 12 months. Licensing revenue was zero for the years ended December 31, 2016 and 2015, and was $155,000 for the year ended December 31, 2014. Cost of Net Revenue Cost of net revenue consists primarily of direct and indirect costs of IC product sales and engineering personnel costs directly related to maintenance and support services specified in licensing agreements. Maintenance and support typically includes engineering support to assist in the commencement of production of a licensee’s products. Advertising Costs Advertising costs are expensed as incurred. Advertising costs were not significant in the years ended December 31, 2016, 2015 and 2014. Research and Development Engineering costs are recorded as research and development expense in the period incurred. Stock-Based Compensation The Company recognizes stock-based compensation for awards on a straight-line basis over the requisite service period, usually the vesting period, based on the grant-date fair value. The Company records stock-based compensation expense for stock options granted to non-employees, excluding non-employee directors, based upon the estimated then-current fair value of the equity instrument using the Black-Scholes pricing model. Assumptions used to value the equity instruments are consistent with equity instruments issued to employees. The Company charges the value of the equity instrument to earnings over the term of the service agreement and the unvested shares underlying the option are subject to periodic revaluation over the remaining vesting period. Per Share Amounts Basic net loss per share is computed by dividing net loss for the period by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share gives effect to all potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of incremental shares of common stock issuable upon the exercise of stock options, vesting of stock awards and purchases under the employee stock purchase plan. The following table sets forth securities outstanding which were excluded from the computation of diluted net loss per share as their inclusion would be anti-dilutive (in thousands):
|  | December 31, |  | December 31, |  | December 31,
|  | 2016 |  | 2015 |  | 2014
Options outstanding to purchase common stock |  | 522 |  | 839 |  | 822
Employee stock purchase plan |  | 44 |  | 44 |  | 21
Unvested restricted common stock units |  | 148 |  | 24 |  | 39
Convertible debt |  | 926 |  | — |  | —
Total |  | 1,640 |  | 907 |  | 882
Income Taxes The Company determines deferred tax assets and liabilities based upon the differences between the financial statement and tax bases of the Company’s assets and liabilities using tax rates in effect for the year in which the Company expects the differences to affect taxable income. A valuation allowance is established for any deferred tax assets for which it is more likely than not that all or a portion of the deferred tax assets will not be realized. The Company files U.S. federal and state and foreign income tax returns in jurisdictions with varying statutes of limitations. The 2006 through 2016 tax years generally remain subject to examination by federal, state and foreign tax authorities. As of December 31, 2016, the Company did not have any unrecognized tax benefits nor expect its unrecognized tax benefits to change significantly over the next 12 months. The Company recognizes interest related to unrecognized tax benefits in its income tax expense and penalties related to unrecognized tax benefits as other income and expenses. During the years ended December 31, 2016, 2015 and 2014, the Company did not recognize any interest or penalties related to unrecognized tax benefits. Comprehensive Loss Comprehensive loss includes unrealized gains and losses on available-for-sale securities. Realized gains and losses on available-for-sale securities are reclassified from accumulated other comprehensive loss and included in other income, net in the consolidated statements of operations and comprehensive loss. All amounts recorded were not significant in the years ended December 31, 2016, 2015 and 2014. Recent Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09 (ASU 2014-09), Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods and services to customers. In March, April and May 2016, the FASB issued additional updates to the new revenue standard relating to reporting revenue on a gross versus net basis, identifying performance obligations and licensing arrangements, and narrow-scope improvements and practical expedients, respectively. ASU 2014-09 will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The accounting standard is effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2017. Early adoption is permitted for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016. ASU 2014-09 provides for one of two methods of transition: retrospective application to each prior period presented; or recognition of the cumulative effect of retrospective application of the new standard in the period of initial application. The Company does not intend to early adopt this standard and plans to use the full retrospective approach to the transition. The Company does not expect that the adoption of ASU 2014-09 will have a material impact on its consolidated financial statements. However, assuming all other revenue recognition criteria have been met, it is likely that ASU 2014-09 would require the Company to recognize revenue and cost relating to distributor sales upon product delivery, subject to estimated allowances for distributor price adjustments and rights of return. In February 2016, the FASB issued ASU No. 2016-02 (ASU 2016-02), Leases. ASU 2016-02 requires lessees to recognize a right-of-use asset and a lease liability equal to the present value of the lease payments for virtually all leases not classified as short term. Consistent with current U.S. GAAP, the recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee primarily depend on its classification as a finance or operating lease. The ASU also will require disclosures to provide additional qualitative and quantitative information about the amounts recorded in the financial statements. ASU 2016-02 is effective for annual and interim reporting periods beginning after December 15, 2018, with early adoption permitted. The new standard requires a modified retrospective transition for application at the beginning of the earliest comparative period presented. The Company is currently evaluating the impact that ASU 2016-02 will have on its consolidated financial statements and related disclosures.

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