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CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock Issued | Common Stock in Treasury | Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings
--- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2018 |  | 23,933 | (10,116) |  |  |
Balance at Dec. 31, 2018 | $ 262,960 | $ 239 | $ (275,889) | $ 276,103 | $ (20,281) | $ 282,788
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | (1,005) |  |  |  |  | (1,005)
Currency translation adjustment | 1,733 |  |  |  | 1,733 |
Shares issued for employee benefit plan and compensation (in shares) |  | 78 |  |  |  |
Shares issued for employee benefit plan and compensation | 347 | $ 1 |  | 346 |  |
Purchase of treasury shares (in shares) |  |  | (43) |  |  |
Purchase of treasury shares | (1,215) |  | $ (1,215) |  |  |
Shares issued to directors (in shares) |  | 8 |  |  |  |
Shares issued to directors | 0 | $ 0 |  | 0 |  |
Employee and director stock-based compensation | 1,918 |  |  | 1,918 |  |
Performance-based common stock warrants | 434 |  |  | 434 |  |
Balance (in shares) at Mar. 31, 2019 |  | 24,019 | (10,159) |  |  |
Balance at Mar. 31, 2019 | 265,172 | $ 240 | $ (277,104) | 278,801 | (18,548) | 281,783
Balance (in shares) at Dec. 31, 2018 |  | 23,933 | (10,116) |  |  |
Balance at Dec. 31, 2018 | 262,960 | $ 239 | $ (275,889) | 276,103 | (20,281) | 282,788
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | (6,066) |  |  |  |  |
Currency translation adjustment | $ (100) |  |  |  |  |
Purchase of treasury shares (in shares) | (48) |  |  |  |  |
Purchase of treasury shares | $ (1,404) |  |  |  |  |
Balance (in shares) at Jun. 30, 2019 |  | 24,043 | (10,164) |  |  |
Balance at Jun. 30, 2019 | 260,871 | $ 240 | $ (277,293) | 281,583 | (20,381) | 276,722
Balance (in shares) at Mar. 31, 2019 |  | 24,019 | (10,159) |  |  |
Balance at Mar. 31, 2019 | 265,172 | $ 240 | $ (277,104) | 278,801 | (18,548) | 281,783
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | (5,061) |  |  |  |  | (5,061)
Currency translation adjustment | (1,833) |  |  |  | (1,833) |
Shares issued for employee benefit plan and compensation (in shares) |  | 17 |  |  |  |
Shares issued for employee benefit plan and compensation | 273 | $ 0 |  | 273 |  |
Purchase of treasury shares (in shares) |  |  | (5) |  |  |
Purchase of treasury shares | (189) |  | $ (189) |  |  |
Shares issued to directors (in shares) |  | 7 |  |  |  |
Shares issued to directors | 0 | $ 0 |  | 0 |  |
Employee and director stock-based compensation | 2,273 |  |  | 2,273 |  |
Performance-based common stock warrants | 236 |  |  | 236 |  |
Balance (in shares) at Jun. 30, 2019 |  | 24,043 | (10,164) |  |  |
Balance at Jun. 30, 2019 | 260,871 | $ 240 | $ (277,293) | 281,583 | (20,381) | 276,722
Balance (in shares) at Dec. 31, 2019 |  | 24,118 | (10,174) |  |  |
Balance at Dec. 31, 2019 | 274,399 | $ 241 | $ (277,817) | 288,338 | (22,781) | 286,418
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | 5,846 |  |  |  |  | 5,846
Currency translation adjustment | (7,009) |  |  |  | (7,009) |
Shares issued for employee benefit plan and compensation (in shares) |  | 129 |  |  |  |
Shares issued for employee benefit plan and compensation | 527 | $ 1 |  | 526 |  |
Purchase of treasury shares (in shares) |  |  | (169) |  |  |
Purchase of treasury shares | (6,291) |  | $ (6,291) |  |  |
Shares issued to directors (in shares) |  | 9 |  |  |  |
Shares issued to directors | 0 | $ 1 |  | (1) |  |
Employee and director stock-based compensation | 2,303 |  |  | 2,303 |  |
Performance-based common stock warrants | 184 |  |  | 184 |  |
Balance (in shares) at Mar. 31, 2020 |  | 24,256 | (10,343) |  |  |
Balance at Mar. 31, 2020 | 269,959 | $ 243 | $ (284,108) | 291,350 | (29,790) | 292,264
Balance (in shares) at Dec. 31, 2019 |  | 24,118 | (10,174) |  |  |
Balance at Dec. 31, 2019 | 274,399 | $ 241 | $ (277,817) | 288,338 | (22,781) | 286,418
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | 20,246 |  |  |  |  |
Currency translation adjustment | $ (7,779) |  |  |  |  |
Purchase of treasury shares (in shares) | (172) |  |  |  |  |
Purchase of treasury shares | $ (6,405) |  |  |  |  |
Balance (in shares) at Jun. 30, 2020 |  | 24,269 | (10,346) |  |  |
Balance at Jun. 30, 2020 | 286,132 | $ 243 | $ (284,222) | 294,007 | (30,560) | 306,664
Balance (in shares) at Mar. 31, 2020 |  | 24,256 | (10,343) |  |  |
Balance at Mar. 31, 2020 | 269,959 | $ 243 | $ (284,108) | 291,350 | (29,790) | 292,264
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | 14,400 |  |  |  |  | 14,400
Currency translation adjustment | (770) |  |  |  | (770) |
Shares issued for employee benefit plan and compensation (in shares) |  | 13 |  |  |  |
Shares issued for employee benefit plan and compensation | 212 | $ 0 |  | 212 |  |
Purchase of treasury shares (in shares) |  |  | (3) |  |  |
Purchase of treasury shares | (114) |  | $ (114) |  |  |
Employee and director stock-based compensation | 2,291 |  |  | 2,291 |  |
Performance-based common stock warrants | 154 |  |  | 154 |  |
Balance (in shares) at Jun. 30, 2020 |  | 24,269 | (10,346) |  |  |
Balance at Jun. 30, 2020 | $ 286,132 | $ 243 | $ (284,222) | $ 294,007 | $ (30,560) | $ 306,664

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