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Stockholder's Equity | 3 Months Ended
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Mar. 31, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Stockholder's Equity | Stockholder's Equity (a) Stock Equity and Incentive Plan The Company recognizes stock-based compensation in accordance with the provisions of ASC Topic 718, Compensation-Stock Compensation. Stock-based compensation expense, excluding compensation charges related to our employee stock purchase plan, or the ESPP, was $789 and $860 for the three months ended March 31, 2020 and 2019, respectively. As of March 31, 2020, there was $2,724 of total unrecognized compensation expense related to stock options, which is expected to be recognized over a weighted-average period of 2.41 years. As of March 31, 2020, there was $2,869 of total unrecognized compensation expense related to restricted stock awards, which is expected to be recognized over a weighted-average period of 2.29 years. Stock Options During the three months ended March 31, 2020, no stock options were exercised for common stock, and no shares of common stock were delivered to the Company as payment for the exercise price or related minimum tax withholding obligations for the exercise of such options. During the three months ended March 31, 2020, no stock options were granted and 95 stock options expired, were canceled or were forfeited. The Company estimates the fair value of each option grant on the date of grant using the Black-Scholes option-pricing model. As of March 31, 2020, there were 1,529 options outstanding with a weighted average exercise price of $9.68 per share and 370 options exercisable with a weighted average exercise price of $9.60 per share. Restricted Stock During the three months ended March 31, 2020, no shares of restricted stock were granted and no shares of restricted stock were forfeited. Additionally, during the three months ended March 31, 2020, 102 shares of restricted stock vested, none of which were surrendered to the Company to satisfy minimum tax withholding obligations for the vesting of such shares. As of March 31, 2020, there were 397 shares of restricted stock outstanding that were subject to service-based vesting conditions. As of March 31, 2020, the Company had no unvested outstanding options and no shares of restricted stock that were subject to performance-based or market-based vesting conditions. (b) Employee Stock Purchase Plan The Company's Amended and Restated 1996 Employee Stock Purchase Plan (ESPP) affords eligible employees the right to purchase common stock, via payroll deductions, through various offering periods at a purchase price equal to 85% of the fair market value of the common stock on the first or last day of the offering period, whichever is lower. During the three months ended March 31, 2020 and 2019, 20 and 23 shares were issued under the ESPP plan, respectively. The Company recorded compensation charges of $16 and $14 for the three months ended March 31, 2020 and 2019, respectively, related to the ESPP. (c) Stock-Based Compensation Expense The following table presents stock-based compensation expense, including under the ESPP, in the Company's consolidated statements of operations for the three months ended March 31, 2020 and 2019:
| Three Months Ended March 31, |  |
| 2020 |  | 2019
Cost of product sales | $ | 40 |  |  | $ | 41 |
Cost of service sales | — |  |  | — |
Research and development | 153 |  |  | 172 |
Sales, marketing and support | 154 |  |  | 182 |
General and administrative | 458 |  |  | 479 |
| $ | 805 |  |  | $ | 874 |
(d) Accumulated Other Comprehensive Loss (AOCI) Comprehensive income (loss) includes net income (loss), unrealized gains and losses from foreign currency translation, unrealized gains and losses from available for sale marketable securities and changes in fair value related to interest rate swap derivative instruments, net of tax attributes. The components of the Company’s comprehensive income (loss) and the effect on earnings for the periods presented are detailed in the accompanying consolidated statements of comprehensive income (loss).
| Foreign Currency Translation |  | Total Accumulated Other Comprehensive Loss
Balance, December 31, 2019 | $ | (2,767) |  |  | $ | (2,767) |
Other comprehensive loss | (2,480) |  |  | (2,480) |
Net other comprehensive loss | (2,480) |  |  | (2,480) |
Balance, March 31, 2020 | $ | (5,247) |  |  | $ | (5,247) |
| Foreign Currency Translation |  | Interest Rate Swaps |  | Total Accumulated Other Comprehensive Loss
Balance, December 31, 2018 | $ | (14,720) |  |  | $ | (11) |  |  | $ | (14,731) |
Other comprehensive income before reclassifications | 1,080 |  |  | — |  |  | 1,080 |
Amounts reclassified from AOCI | — |  |  | 8 |  |  | 8 |
Net other comprehensive income | 1,080 |  |  | 8 |  |  | 1,088 |
Balance, March 31, 2019 | $ | (13,640) |  |  | $ | (3) |  |  | $ | (13,643) |
For additional information, see Note 4, "Marketable Securities," and Note 17, "Derivative Instruments and Hedging Activities.

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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- References No definition available. + Details
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