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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid in Capital | Accumulated deficit | Accumulated Other Comprehensive Loss | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2018 |  | 17,878,000 |  |  |  | 1,708,000
Balance at Dec. 31, 2018 | $ 45,946 | $ 357 | $ 50,251 | $ 5,427 | $ (4,253) | $ (5,836)
Net loss | (2,729) |  |  | (2,729) |  |
Issuance of common stock upon the exercise of stock options (in shares) |  | 78,000 |  |  |  |
Issuance of common stock upon the exercise of stock options | 30 |  | 30 |  |  |
Stock-based compensation | 248 |  | 248 |  |  |
Foreign currency translation adjustments | (10) |  |  |  | (10) |
Balance (in shares) at Mar. 31, 2019 |  | 17,956,000 |  |  |  | 1,708,000
Balance at Mar. 31, 2019 | 43,485 | $ 357 | 50,529 | 2,698 | (4,263) | $ (5,836)
Balance (in shares) at Dec. 31, 2018 |  | 17,878,000 |  |  |  | 1,708,000
Balance at Dec. 31, 2018 | 45,946 | $ 357 | 50,251 | 5,427 | (4,253) | $ (5,836)
Net loss | (3,838) |  |  |  |  |
Foreign currency translation adjustments | 121 |  |  |  |  |
Balance (in shares) at Jun. 30, 2019 |  | 18,035,000 |  |  |  | 1,708,000
Balance at Jun. 30, 2019 | 55,787 | $ 360 | 63,806 | 1,589 | (4,132) | $ (5,836)
Balance (in shares) at Mar. 31, 2019 |  | 17,956,000 |  |  |  | 1,708,000
Balance at Mar. 31, 2019 | 43,485 | $ 357 | 50,529 | 2,698 | (4,263) | $ (5,836)
Net loss | (1,109) |  |  | (1,109) |  |
Issuance of common stock upon the exercise of stock options (in shares) |  | 79,000 |  |  |  |
Issuance of common stock upon the exercise of stock options | 213 | $ 3 | 210 |  |  |
Stock-based compensation | 602 |  | 602 |  |  |
Foreign currency translation adjustments | 131 |  |  |  | 131 |
Convertible notes conversion discount | 12,465 |  | 12,465 |  |  |
Balance (in shares) at Jun. 30, 2019 |  | 18,035,000 |  |  |  | 1,708,000
Balance at Jun. 30, 2019 | $ 55,787 | $ 360 | 63,806 | 1,589 | (4,132) | $ (5,836)
Balance (in shares) at Dec. 31, 2019 | 16,629,177 | 18,360,000 |  |  |  | 1,731,000
Balance at Dec. 31, 2019 | $ 72,847 | $ 367 | 94,372 | (10,144) | (5,368) | $ (6,380)
Net loss | (10,910) |  |  | (10,910) |  |
Issuance of common stock upon the exercise of stock options (in shares) |  | 2,000 |  |  |  |
Issuance of common stock upon the exercise of stock options | 30 |  | 30 |  |  |
Net issuance of restricted stock awards (in shares) |  | 21,000 |  |  |  |
Net issuance of restricted stock awards | 0 |  |  |  |  |
Treasury stock acquired from employees upon vesting or forfeiture of restricted stock (in shares) |  |  |  |  |  | 38,000
Treasury stock acquired from employees upon vesting or forfeiture of restricted stock | (524) |  |  |  |  | $ (524)
Acquisition consideration (in shares) |  | 908,000 |  |  |  |
Issuance of restricted stock for acquisition | 19 | $ 19 |  |  |  |
Equity component of redeemed 2024 convertible notes, net of deferred taxes and issuance costs | (5,553) |  | (7,988) |  |  | $ 2,435
Equity component of issued 2026 convertible notes, net of deferred taxes and issuance costs shares (in shares) |  |  |  |  |  | (722,000)
Equity component of issued 2026 convertible notes, net of deferred taxes and issuance costs | 19,097 |  | 19,097 |  |  |
Stock-based compensation | 1,089 |  | 1,089 |  |  |
Foreign currency translation adjustments | 201 |  |  |  | 201 |
Balance (in shares) at Mar. 31, 2020 |  | 19,291,000 |  |  |  | 1,047,000
Balance at Mar. 31, 2020 | $ 76,296 | $ 386 | 106,600 | (21,054) | (5,167) | $ (4,469)
Balance (in shares) at Dec. 31, 2019 | 16,629,177 | 18,360,000 |  |  |  | 1,731,000
Balance at Dec. 31, 2019 | $ 72,847 | $ 367 | 94,372 | (10,144) | (5,368) | $ (6,380)
Net loss | $ (19,886) |  |  |  |  |
Issuance of common stock upon the exercise of stock options (in shares) | 6,000 |  |  |  |  |
Foreign currency translation adjustments | $ 359 |  |  |  |  |
Balance (in shares) at Jun. 30, 2020 | 18,245,225 | 19,295,000 |  |  |  | 1,050,000
Balance at Jun. 30, 2020 | $ 68,610 | $ 386 | 107,540 | (30,030) | (5,009) | $ (4,277)
Balance (in shares) at Mar. 31, 2020 |  | 19,291,000 |  |  |  | 1,047,000
Balance at Mar. 31, 2020 | 76,296 | $ 386 | 106,600 | (21,054) | (5,167) | $ (4,469)
Net loss | (8,976) |  |  | (8,976) |  |
Issuance of common stock upon the exercise of stock options (in shares) |  | 4,000 |  |  |  |
Issuance of common stock upon the exercise of stock options | 12 |  | 12 |  |  |
Treasury stock acquired from employees upon vesting or forfeiture of restricted stock (in shares) |  |  |  |  |  | 3,000
Treasury stock acquired from employees upon vesting or forfeiture of restricted stock | (3) |  | (195) |  |  | $ 192
Stock-based compensation | 1,123 |  | 1,123 |  |  |
Foreign currency translation adjustments | $ 158 |  |  |  | 158 |
Balance (in shares) at Jun. 30, 2020 | 18,245,225 | 19,295,000 |  |  |  | 1,050,000
Balance at Jun. 30, 2020 | $ 68,610 | $ 386 | $ 107,540 | $ (30,030) | $ (5,009) | $ (4,277)

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