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Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings (Accumulated Deficit) | Accumulated Other Comprehensive Loss | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2017 |  |  | 18,788,000 |  |  |  |
Beginning balance at Dec. 31, 2017 | $ 105,665 |  | $ 188 | $ 134,361 | $ (4,417) | $ (11,317) | $ (13,150)
Beginning balance, treasury stock (in shares) at Dec. 31, 2017 |  |  |  |  |  |  | (1,659,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net (loss) income | (6,410) |  |  |  | (6,410) |  |
Other comprehensive income (loss) | (2,135) | [1] |  |  |  | (2,135) |
Stock-based compensation | 2,452 |  |  | 2,452 |  |  |
Issuance of common stock under employee stock purchase plan (in shares) |  |  | 17,000 |  |  |  |
Issuance of common stock under employee stock purchase plan | 167 |  |  | 167 |  |  |
Sale of treasury stock (in shares) |  |  |  |  |  |  | 377,000
Sale of treasury stock | 4,464 |  |  | 1,478 |  |  | $ 2,986
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares) |  |  | 217,000 |  |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures | 275 |  | $ 2 | 273 |  |  |
Ending balance (in shares) at Sep. 30, 2018 |  |  | 19,022,000 |  |  |  |
Ending balance at Sep. 30, 2018 | 101,730 |  | $ 190 | 138,731 | (13,575) | (13,452) | $ (10,164)
Ending balance, treasury stock (in shares) at Sep. 30, 2018 |  |  |  |  |  |  | (1,282,000)
Beginning balance (in shares) at Jun. 30, 2018 |  |  | 18,937,000 |  |  |  |
Beginning balance at Jun. 30, 2018 | 102,431 |  | $ 189 | 137,508 | (12,401) | (12,701) | $ (10,164)
Beginning balance, treasury stock (in shares) at Jun. 30, 2018 |  |  |  |  |  |  | (1,282,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net (loss) income | (1,174) |  |  |  | (1,174) |  |
Other comprehensive income (loss) | (751) | [1] |  |  |  | (751) |
Stock-based compensation | 860 |  |  | 860 |  |  |
Issuance of common stock under employee stock purchase plan (in shares) |  |  | 17,000 |  |  |  |
Issuance of common stock under employee stock purchase plan | 167 |  |  | 167 |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares) |  |  | 68,000 |  |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures | 197 |  | $ 1 | 196 |  |  |
Ending balance (in shares) at Sep. 30, 2018 |  |  | 19,022,000 |  |  |  |
Ending balance at Sep. 30, 2018 | $ 101,730 |  | $ 190 | 138,731 | (13,575) | (13,452) | $ (10,164)
Ending balance, treasury stock (in shares) at Sep. 30, 2018 |  |  |  |  |  |  | (1,282,000)
Beginning balance (in shares) at Dec. 31, 2018 | 17,743,971 |  | 19,026,000 |  |  |  |
Beginning balance at Dec. 31, 2018 | $ 99,515 |  | $ 190 | 139,617 | (15,397) | (14,731) | $ (10,164)
Beginning balance, treasury stock (in shares) at Dec. 31, 2018 | (1,282,422) |  |  |  |  |  | (1,282,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net (loss) income | $ 36,738 |  |  |  | 36,738 |  |
Other comprehensive income (loss) | 10,133 | [1] |  |  |  | 10,133 |
ASC 606 correction | Implementation of ASC 606 | 1,680 |  |  |  | 1,680 |  |
Stock-based compensation | 3,019 |  |  | 3,019 |  |  |
Issuance of common stock under employee stock purchase plan (in shares) |  |  | 45,000 |  |  |  |
Issuance of common stock under employee stock purchase plan | 414 |  |  | 414 |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares) |  |  | 310,000 |  |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures | $ 168 |  | $ 4 | 164 |  |  |
Ending balance (in shares) at Sep. 30, 2019 | 18,098,586 |  | 19,381,000 |  |  |  |
Ending balance at Sep. 30, 2019 | $ 151,667 |  | $ 194 | 143,214 | 23,021 | (4,598) | $ (10,164)
Ending balance, treasury stock (in shares) at Sep. 30, 2019 | (1,282,422) |  |  |  |  |  | (1,282,000)
Beginning balance (in shares) at Jun. 30, 2019 |  |  | 19,320,000 |  |  |  |
Beginning balance at Jun. 30, 2019 | $ 155,761 |  | $ 193 | 141,856 | 27,365 | (3,489) | $ (10,164)
Beginning balance, treasury stock (in shares) at Jun. 30, 2019 |  |  |  |  |  |  | (1,282,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net (loss) income | (4,344) |  |  |  | (4,344) |  |
Other comprehensive income (loss) | (1,109) | [1] |  |  |  | (1,109) |
ASC 606 correction | Implementation of ASC 606 | 0 |  |  |  | 0 |  |
Stock-based compensation | 1,112 |  |  | 1,112 |  |  |
Issuance of common stock under employee stock purchase plan (in shares) |  |  | 22,000 |  |  |  |
Issuance of common stock under employee stock purchase plan | 196 |  |  | 196 |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares) |  |  | 39,000 |  |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures | $ 51 |  | $ 1 | 50 |  |  |
Ending balance (in shares) at Sep. 30, 2019 | 18,098,586 |  | 19,381,000 |  |  |  |
Ending balance at Sep. 30, 2019 | $ 151,667 |  | $ 194 | $ 143,214 | $ 23,021 | $ (4,598) | $ (10,164)
Ending balance, treasury stock (in shares) at Sep. 30, 2019 | (1,282,422) |  |  |  |  |  | (1,282,000)
[1] | Tax impact was nominal for all periods.

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