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, 2016. Results of operations for the three and nine months ended September 30, 2017 are not necessarily indicative of the results of operations expected for the full year. Use of Estimates Investments The following is a summary of our available-for-sale securities at September 30, 2017 and December 31, 2016: Amortized Gross Gross Fair Value September 30, 2017 Guaranteed investment certificates $ 16,039 $ — $ — $ 16,039 Corporate bonds 85,923 — (300 ) 85,623 Total available-for-sale securities $ 101,962 $ — $ (300 ) $ 101,662 December 31, 2016 Guaranteed investment certificates $ 11,160 $ — $ — $ 11,160 Total available-for-sale securities $ 11,160 $ — $ — $ 11,160 At September 30, 2017 maturities of our available-for-sale securities were as follows: Less than one year $ 83,582 $ — $ (210 ) $ 83,372 Greater than one year $ 18,380 $ — $ (90 ) $ 18,290 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). All of our available-for-sale securities are measured as Level 1 instruments as of September 30, 2017 and December 31, 2016. Included in cash and cash equivalents at September 30, 2017 and December 31, 2016, was $33,633 and $83,704 invested in government money market funds. These funds hold investments in government securities and are measured as 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 September 30, 2017 and December 31, 2016 was $3,670 and $1,980, 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. In 2017, we purchased certificates of deposit (“CDs”) from a commercial bank. The CDs bear interest at rates ranging from 0.86% to 0.94% and mature periodically through January 15, 2018. The carrying values of the CDs approximate their fair value. These CDs serve as collateral for certain standby letters of credit and are reported as restricted cash on the accompanying consolidated balance sheets. Also see Note 7 – Commitments and Contingencies. Inventories September 30, December 31, Raw materials $ 8,252 $ 5,399 Work in process 1,746 1,034 Finished goods 6,861 5,366 $ 16,859 $ 11,799 Property and Equipment Intangible Assets Goodwill We performed our last annual impairment assessment as of July 31, 2017 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 September 30, 2017, we believe no indicators of impairment exist. The increase in goodwill from $18,793 as of December 31, 2016 to $20,257 as of September 30, 2017 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. In June 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 ® In June 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 our OraQuick ® ® In August 2016, we were awarded a contract for up to $16,600 in total funding from BARDA related to our rapid Zika test. The six-year, multi-phased contract includes an initial commitment of $7,000 and options for up to an additional $9,600 to fund the evaluation of additional product enhancements, and clinical and regulatory activities. In May 2017, BARDA exercised an option to provide $2,600 in additional funding for our rapid Zika test. Funding received under this contract is recorded as other revenue in our consolidated statements of income as the activities are being performed and the related costs are incurred. During the third quarter and first nine months of 2017, $553 and $1,787, respectively, was recognized as other revenue in connection with this grant. During the third quarter and first nine months of 2016, $203 was recognized as other revenue in connection with this grant. In June 2017, we entered into a four-year Charitable Support Agreement with the Bill & Melinda Gates Foundation (“Gates Foundation”) that will enable us to offer 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 Nine Months Ended September 30, Ended September 30, 2017 2016 2017 2016 Net income $ 5,763 $ 6,242 $ 23,632 $ 12,524 Weighted average shares of common stock outstanding: Basic 60,090 55,653 58,511 55,549 Dilutive effect of stock options, restricted stock, and performance units 2,082 877 2,058 724 Diluted 62,172 56,530 60,569 56,273 Earnings per share: Basic $ 0.10 $ 0.11 $ 0.40 $ 0.23 Diluted $ 0.09 $ 0.11 $ 0.39 $ 0.22 For the three-month periods ended September 30, 2017 and 2016, outstanding common stock options, unvested restricted stock, and unvested performance units representing 8 and 2,130 shares, respectively, were excluded from the computation of diluted earnings per share as their inclusion would have been anti-dilutive. For the nine months ended September 30, 2017 and 2016, outstanding common stock options, unvested restricted stock and unvested performance units representing 238 and 2,837 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 (losses) gains resulting from foreign currency transactions that are included in other income (expense) in our consolidated statements of income were $(638) and $84 for the three months ended September 30, 2017 and 2016, respectively. Net foreign exchange losses were $(1,256) and $(564) for the nine months ended September 30, 2017 and 2016, 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. Accumulated other comprehensive loss at September 30, 2017 consists of $9,338 of currency translation adjustments and $300 of net unrealized losses on marketable securities. Recent Accounting Pronouncements Revenue from Contracts with Customers The FASB allows two adoption methods under ASU 2014-09. We plan to adopt the standard using the “modified retrospective method.” Under that method, we will apply the rules to all contracts existing as of January 1, 2018, recognizing in beginning retained earnings an adjustment for the cumulative effective of the change and providing additional disclosures comparing results to those under the previous accounting standard. Upon initial evaluation, we believe the key changes in the standard that impact our revenue recognition relate to the allocation of the transaction price to performance obligations related to our drug testing kits. This revenue stream amounts to less than 1% of total consolidated revenues. We will continue to evaluate the impact that the adoption of ASU 2014-09 will have on our consolidated financial statements and related disclosures, but do not anticipate the adoption will have a material impact on our financial results. 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 In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment In March 2017, the FASB issued ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities |