Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Principles of Consolidation and Basis of Presentation . The accompanying consolidated financial statements are unaudited and, in the opinion of management, include all adjustments (consisting only of normal and recurring adjustments) necessary for a fair presentation of our financial position and results of operations for these interim periods. These financial statements should be read in conjunction with the financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015. Results of operations for the three and six months ended June 30, 2016 are not necessarily indicative of the results of operations expected for the full year. Use of Estimates . Short-Term Investments . Our available-for-sale securities as of June 30, 2016 and December 31, 2015 consisted of guaranteed investment certificates with amortized cost and fair value of $7,736 and $7,225, respectively. Fair Value of Financial Instruments . Fair value measurements of all financial assets and liabilities that are being measured and reported on a fair value basis are required to be classified and disclosed in one of the following three categories: Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; Level 2: Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability; and Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Included in cash and cash equivalents at June 30, 2016 and December 31, 2015, was $84,229 and $65,509 invested in money market funds. These funds are Level 1 instruments. We offer a nonqualified deferred compensation plan for certain eligible employees and members of our Board of Directors. The assets of the plan are held in the name of the Company at a third-party financial institution. Separate accounts are maintained for each participant to reflect the amounts deferred by the participant and all earnings and losses on those deferred amounts. The assets of the plan are held in mutual funds and Company stock. The fair value of the plan assets as of June 30, 2016 and December 31, 2015 was $1,589 and $1,324, respectively, and was calculated using the quoted market prices of the assets as of those dates. All investments in the plan are classified as trading securities and measured as Level 1 instruments. The fair value of plan assets is included in other assets with the same amount included in other liabilities in the accompanying consolidated balance sheets. All of our available-for-sale securities are measured as Level 1 instruments as of June 30, 2016 and December 31, 2015. Inventories . June 30, 2016 December 31, 2015 Raw materials $ 6,085 $ 7,895 Work in process 497 333 Finished goods 4,784 5,014 $ 11,366 $ 13,242 Property and Equipment . Intangible Assets June 30, 2016 Amortization Gross Accumulated Net Customer list 10 $ 9,692 $ (4,552 ) $ 5,140 Patents and product rights 10 5,400 (3,583 ) 1,817 Acquired technology 7 7,528 (4,974 ) 2,554 Tradename 15 3,715 (1,206 ) 2,509 $ 26,335 $ (14,315 ) $ 12,020 December 31, 2015 Amortization Gross Accumulated Net Customer list 10 $ 9,051 $ (3,818 ) $ 5,233 Patents and product rights 10 5,400 (3,358 ) 2,042 Acquired technology 7 7,030 (4,172 ) 2,858 Tradename 15 3,469 (1,011 ) 2,458 $ 24,950 $ (12,359 ) $ 12,591 Goodwill . We performed our last annual impairment assessment as of July 31, 2015 utilizing a qualitative evaluation and concluded that it was more likely than not that the fair value of our DNAG reporting unit is greater than its carrying value. We believe we have made reasonable estimates and assumptions to calculate the fair value of our reporting unit. If actual future results are not consistent with management’s estimates and assumptions, we may have to take an impairment charge in the future related to our goodwill. Future impairment tests will continue to be performed annually in the fiscal third quarter, or sooner if a triggering event occurs. As of June 30, 2016, we believe no indicators of impairment exist. The change in goodwill from $18,250 as of December 31, 2015 to $19,541 as of June 30, 2016 is a result of foreign currency translation. Revenue Recognition . ® Our net revenues recorded on sales of the OraQuick ® We record shipping and handling charges billed to our customers as product revenue and the related expense as cost of products sold. Taxes assessed by governmental authorities, such as sales or value-added taxes, are excluded from product revenues. On June 10, 2014, we entered into a Master Program Services and Co-Promotion Agreement with AbbVie Bahamas Ltd., a wholly-owned subsidiary of AbbVie Inc. (“AbbVie”), to co-promote our OraQuick ® Pursuant to the agreement, we granted exclusive co-promotion rights for the OraQuick ® ® ® Under the terms of this agreement, we are eligible to receive up to $75,000 in aggregate payments. We are recognizing this revenue ratably on a monthly basis over the term of the agreement which was to terminate on December 31, 2019. During the second quarter and first six months of 2016, $3,360 and $6,722, respectively, in exclusivity revenue was recognized and was recorded as other revenue in our consolidated statements of income. Effective June 30, 2016, we mutually agreed to an early termination of this agreement with AbbVie and it will now end on December 31, 2016. Following the termination of the agreement, AbbVie will be relieved of its co-promotion obligations, including its obligation to detail the OraQuick ® ® On June 12, 2015, we were awarded a grant for up to $10,400 in total funding from the U.S. Department of Health and Human Services (“HHS”) Office of the Assistant Secretary for Preparedness and Response’s Biomedical Advanced Research and Development Authority (“BARDA”) related to the development of our OraQuick ® ® Customer Sales Returns and Allowances . ® ® Deferred Revenue . Customer and Vendor Concentrations . We currently purchase certain products and critical components of our products from sole-supply vendors. If these vendors are unable or unwilling to supply the required components and products, we could be subject to increased costs and substantial delays in the delivery of our products to our customers. Also, our subsidiary, DNAG, uses two third-party suppliers to manufacture its products. Our inability to have a timely supply of any of these components and products could have a material adverse effect on our business, as well as our financial condition and results of operations. Earnings Per Share . The computations of basic and diluted earnings per share are as follows: Three Months Six Months Ended June 30, Ended June 30, 2016 2015 2016 2015 Net income $ 3,836 $ 1,968 $ 6,282 $ 2,081 Weighted average shares of common stock outstanding: Basic 55,543 56,453 55,497 56,398 Dilutive effect of stock options and restricted stock 665 234 647 280 Diluted 56,208 56,687 56,144 56,678 Earnings per share: Basic $ 0.07 $ 0.03 $ 0.11 $ 0.04 Diluted $ 0.07 $ 0.03 $ 0.11 $ 0.04 For the three-month periods ended June 30, 2016 and 2015, outstanding common stock options and unvested restricted stock representing 2,459 and 5,010 shares, respectively, were excluded from the computation of diluted earnings per share as their inclusion would have been anti-dilutive. For the six months ended June 30, 2016 and 2015, outstanding common stock options and unvested restricted stock representing 3,191 and 3,856 shares, respectively, were similarly excluded from the computation of diluted earnings per share. Foreign Currency Translation Transaction gains and losses resulting from exchange rate changes on transactions denominated in currencies other than functional currency are included in our consolidated statements of income in the period in which the change occurs. Net foreign exchange gains (losses) resulting from foreign currency transactions that are included in other income (expense) in our consolidated statements of income were $(302) and $(47) for the three months ended June 30, 2016 and 2015, respectively. Net foreign exchange gains (losses) were $(648) and $541 for the six months ended June 30, 2016 and 2015, respectively. Accumulated Other Comprehensive Income (Loss) . We have defined the Canadian dollar as the functional currency of our Canadian subsidiary, DNAG, and as such, the results of its operations are translated into U.S. dollars, which is the reporting currency of the Company. The $3,230 and $(3,178) currency translation adjustments recorded in the first six months of 2016 and 2015, respectively, are largely the result of the translation of our Canadian operation’s balance sheets into U.S. dollars. Recent Accounting Pronouncements . Revenue from Contracts with Customers In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory In February 2016, the FASB issued ASU 2016-02, Leases In March 2016, the FASB issued authoritative guidance under ASU 2016-09, Compensation-Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting |