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Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Restricted Stock Units (RSUs) [Member] Common Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2017 |  | 14,688 |  |  |  |
Balance at Dec. 31, 2017 |  | $ 147 | $ 68,617 | $ 199,511 | $ (4,784) | $ 263,491
Issuance of common stock for equity awards (in shares) |  | 362 |  |  |  |
Issuance of common stock for equity awards |  | $ 4 | 2,882 | 0 | 0 | 2,886
Retirement of common stock for minimum tax withholdings (in shares) |  | (34) |  |  |  |
Retirement of common stock for minimum tax withholdings |  | $ (1) | (1,790) | 0 | 0 | (1,791)
Stock-based compensation expense |  | $ 0 | 11,046 | 0 | 0 | 11,046
Repurchase of common stock (in shares) |  | (806) |  |  |  |
Repurchase of common stock |  | $ (8) | (29,992) | 0 | 0 | (30,000)
Net income (loss) |  | 0 | 0 | 18,722 | 0 | 18,722
Other comprehensive income (loss) |  | $ 0 | 0 | 0 | (742) | (742)
Balance (in shares) at Dec. 31, 2018 |  | 14,210 |  |  |  |
Balance at Dec. 31, 2018 |  | $ 142 | 50,763 | 218,233 | (5,526) | 263,612
Issuance of common stock for equity awards (in shares) |  | 551 |  |  |  |
Issuance of common stock for equity awards |  | $ 6 | 22,145 | 0 | 0 | 22,151
Retirement of common stock for minimum tax withholdings (in shares) |  | (5) |  |  |  |
Retirement of common stock for minimum tax withholdings |  | $ 0 | (293) | 0 | 0 | (293)
Stock-based compensation expense |  | $ 0 | 6,087 | 0 | 0 | 6,087
Repurchase of common stock (in shares) |  | (452) |  |  |  |
Repurchase of common stock |  | $ (5) | (29,995) | 0 | 0 | (30,000)
Net income (loss) |  | 0 | 0 | 27,193 | 0 | 27,193
Other comprehensive income (loss) |  | $ 0 | 0 | 0 | (372) | (372)
Vesting of restricted stock units (in shares) | 17 |  |  |  |  |
Forfeiture of restricted stock awards (in shares) |  | (13) |  |  |  |
Balance (in shares) at Dec. 31, 2019 |  | 14,308 |  |  |  |
Balance at Dec. 31, 2019 |  | $ 143 | 48,707 | 245,426 | (5,898) | 288,378
Issuance of common stock for equity awards (in shares) |  | 123 |  |  |  |
Issuance of common stock for equity awards |  | $ 1 | 1,523 | 0 | 0 | 1,524
Retirement of common stock for minimum tax withholdings (in shares) |  | (8) |  |  |  |
Retirement of common stock for minimum tax withholdings |  | $ 0 | (262) | 0 | 0 | (262)
Stock-based compensation expense |  | $ 0 | 5,386 | 0 | 0 | 5,386
Repurchase of common stock (in shares) |  | (139) |  |  |  |
Repurchase of common stock |  | $ (1) | 1 | 0 | 0 | 0
Net income (loss) |  | 0 | 0 | (23,982) | 0 | (23,982)
Other comprehensive income (loss) |  | $ 0 | 0 | 0 | 1,356 | 1,356
Vesting of restricted stock units (in shares) |  | 54 |  |  |  |
Forfeiture of restricted stock awards (in shares) |  | (9) |  |  |  |
Balance (in shares) at Dec. 31, 2020 |  | 14,329 |  |  |  |
Balance at Dec. 31, 2020 |  | $ 143 | $ 55,355 | $ 221,444 | $ (4,542) | $ 272,400

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