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Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | (Accumulated Deficit) Retained Earnings | Accumulated Other Comprehensive (Loss) Income | 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)
Net income (loss) | (5,236) |  |  |  | (5,236) |  |
Other comprehensive income (loss) | (1,384) | [1] |  |  |  | (1,384) |
Stock-based compensation | 1,592 |  |  | 1,592 |  |  |
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) |  |  | 149,000 |  |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures | 78 |  | $ 1 | 77 |  |  |
Ending balance (in shares) at Jun. 30, 2018 |  |  | 18,937,000 |  |  |  |
Ending balance at Jun. 30, 2018 | 102,431 |  | $ 189 | 137,508 | (12,401) | (12,701) | $ (10,164)
Ending balance, treasury stock (in shares) at Jun. 30, 2018 |  |  |  |  |  |  | (1,282,000)
Beginning balance (in shares) at Mar. 31, 2018 |  |  | 18,804,000 |  |  |  |
Beginning balance at Mar. 31, 2018 | 106,834 |  | $ 188 | 136,718 | (11,058) | (8,850) | $ (10,164)
Beginning balance, treasury stock (in shares) at Mar. 31, 2018 |  |  |  |  |  |  | (1,282,000)
Net income (loss) | (1,343) |  |  |  | (1,343) |  |
Other comprehensive income (loss) | (3,851) | [1] |  |  |  | (3,851) |
Stock-based compensation | 739 |  |  | 739 |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares) |  |  | 133,000 |  |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures | 52 |  | $ 1 | 51 |  |  |
Ending balance (in shares) at Jun. 30, 2018 |  |  | 18,937,000 |  |  |  |
Ending balance at Jun. 30, 2018 | $ 102,431 |  | $ 189 | 137,508 | (12,401) | (12,701) | $ (10,164)
Ending balance, treasury stock (in shares) at Jun. 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)
Net income (loss) | $ 40,997 |  |  |  |  |  |
Other comprehensive income (loss) | 11,242 | [1] |  |  |  | 11,242 |
Stock-based compensation | 1,907 |  |  | 1,907 |  |  |
Issuance of common stock under employee stock purchase plan (in shares) |  |  | 23,000 |  |  |  |
Issuance of common stock under employee stock purchase plan | 218 |  |  | 218 |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares) |  |  | 271,000 |  |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures | $ 117 |  | $ 3 | 114 |  |  |
Ending balance (in shares) at Jun. 30, 2019 | 18,018,895 |  | 19,320,000 |  |  |  |
Ending balance at Jun. 30, 2019 | $ 153,996 |  | $ 193 | 141,856 | 25,600 | (3,489) | $ (10,164)
Ending balance, treasury stock (in shares) at Jun. 30, 2019 | (1,282,422) |  |  |  |  |  | (1,282,000)
Beginning balance (in shares) at Mar. 31, 2019 |  |  | 19,134,000 |  |  |  |
Beginning balance at Mar. 31, 2019 | $ 95,598 |  | $ 191 | 140,790 | (21,576) | (13,643) | $ (10,164)
Beginning balance, treasury stock (in shares) at Mar. 31, 2019 |  |  |  |  |  |  | (1,282,000)
Net income (loss) | 47,176 |  |  |  |  |  |
Other comprehensive income (loss) | 10,154 | [1] |  |  |  | 10,154 |
Stock-based compensation | 1,033 |  |  | 1,033 |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares) |  |  | 186,000 |  |  |  |
Exercise of stock options and issuance of restricted stock awards, net of forfeitures | $ 35 |  | $ 2 | 33 |  |  |
Ending balance (in shares) at Jun. 30, 2019 | 18,018,895 |  | 19,320,000 |  |  |  |
Ending balance at Jun. 30, 2019 | $ 153,996 |  | $ 193 | $ 141,856 | $ 25,600 | $ (3,489) | $ (10,164)
Ending balance, treasury stock (in shares) at Jun. 30, 2019 | (1,282,422) |  |  |  |  |  | (1,282,000)
[1] | Tax impact was nominal for all periods.

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