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Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Cumulative Effect, Period of Adoption, Adjustment [Member]
Common Stock Outstanding [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Additional Paid-in Capital [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Treasury Stock [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
AOCI Attributable to Parent [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Common Stock Outstanding [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2017             22,064,007          
Balance at Dec. 31, 2017             $ 22 $ 217,417 $ (26,056) $ (586) $ 53,873 $ 244,670
Net income (loss)             0 0 0 0 574 574
Other comprehensive income (loss)             0 0 0 (528) 0 (528)
Equity-based compensation             $ 0 10,367 0 0 0 10,367
Purchase of treasury stock (in shares)             (655,876)          
Purchase of treasury stock             $ 0 0 (20,008) 0 0 (20,008)
Issuance of treasury stock upon exercise of stock-based awards (in shares)             379,729          
Issuance of treasury stock upon exercise of stock-based awards               (4,534) 6,932 0 (149) 2,249
Balance (in shares) at Dec. 31, 2018             21,787,860          
Balance at Dec. 31, 2018 $ 0 $ 0 $ 0 $ 0 $ 8,555 $ 8,555 $ 22 223,250 (39,132) (1,114) 62,853 245,879
Net income (loss)             0 0 0 0 28 28
Other comprehensive income (loss)             0 0 0 1,208 0 1,208
Equity-based compensation             $ 0 10,718 0 0 0 10,718
Purchase of treasury stock (in shares)             (355,180)          
Purchase of treasury stock             $ 0 0 (9,113) 0 0 (9,113)
Issuance of treasury stock upon exercise of stock-based awards (in shares)             406,689          
Issuance of treasury stock upon exercise of stock-based awards             $ 0 (5,963) 8,855 0 (455) 2,437
Balance (in shares) at Dec. 31, 2019             21,839,369          
Balance at Dec. 31, 2019             $ 22 228,005 (39,390) 94 62,426 251,157
Net income (loss)             0 0 0 0 (2,379) (2,379)
Other comprehensive income (loss)             0 0 0 384 0 384
Equity-based compensation             $ 0 13,636 0 0 0 13,636
Purchase of treasury stock (in shares)             (202,392)          
Purchase of treasury stock             $ 0 0 (4,780) 0 0 (4,780)
Issuance of treasury stock upon exercise of stock-based awards (in shares)             623,940          
Issuance of treasury stock upon exercise of stock-based awards             $ 0 (8,469) 14,037 0 (2,697) 2,871
Balance (in shares) at Dec. 31, 2020             22,260,917          
Balance at Dec. 31, 2020             $ 22 $ 233,172 $ (30,133) $ 478 $ 57,350 $ 260,889