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Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2019 78,642,078 2,768,399      
Balance at Dec. 31, 2019 $ 39 $ (8,184) $ 406,198 $ (187,116) $ 210,937
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 1,566,907 0      
Vesting of restricted stock units and issuance of stock under incentive plans $ 1 $ 0 (1) 0 0
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares) 0 190,326      
Increase in treasury stock resulting from shares withheld to cover statutory taxes $ 0 $ (446) 0 0 (446)
Share-based compensation 0 0 3,764 0 3,764
Net (loss) income $ 0 $ 0 0 860 860
Repurchase of shares into treasury stock (in shares) 0 657,673      
Repurchase of shares into treasury stock $ 0 $ (1,300) 0 0 (1,300)
Exercise of warrants by certain warrant holders (see Note 7) (in shares) (300,000) 0      
Balance (in shares) at Jun. 30, 2020 79,908,985 3,616,398      
Balance at Jun. 30, 2020 $ 40 $ (9,930) 409,961 (186,256) 213,815
Balance (in shares) at Mar. 31, 2020 79,809,417 3,601,804      
Balance at Mar. 31, 2020 $ 40 $ (9,900) 408,633 (186,708) 212,065
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 99,568 0      
Vesting of restricted stock units and issuance of stock under incentive plans $ 0 $ 0 0 0 0
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares) 0 14,594      
Increase in treasury stock resulting from shares withheld to cover statutory taxes $ 0 $ (30) 0 0 (30)
Share-based compensation 0 0 1,328 0 1,328
Net (loss) income $ 0 $ 0 0 452 452
Balance (in shares) at Jun. 30, 2020 79,908,985 3,616,398      
Balance at Jun. 30, 2020 $ 40 $ (9,930) 409,961 (186,256) 213,815
Balance (in shares) at Dec. 31, 2020 80,295,141 3,945,867      
Balance at Dec. 31, 2020 $ 40 $ (9,999) 411,753 (184,909) 216,885
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 1,947,118 0      
Vesting of restricted stock units and issuance of stock under incentive plans $ 1 $ 0 135 0 136
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares) 0 122,965      
Increase in treasury stock resulting from shares withheld to cover statutory taxes $ 0 $ (667) 0 0 $ (667)
Exercise of stock options (in shares) 198,000 0     198,000
Exercise of stock options $ 0 $ 0 934 0 $ 934
Share-based compensation 0 0 2,503 0 2,503
Net (loss) income $ 0 $ 0 0 (11,437) $ (11,437)
Exercise of stock options (in shares) 198,000 0     198,000
Exercise of stock options $ 0 $ 0 934 0 $ 934
Balance (in shares) at Jun. 30, 2021 82,440,259 4,068,832      
Balance at Jun. 30, 2021 $ 41 $ (10,666) 415,325 (196,346) 208,354
Balance (in shares) at Mar. 31, 2021 82,228,823 4,055,011      
Balance at Mar. 31, 2021 $ 41 $ (10,623) 413,958 (191,167) 212,209
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 211,436 0      
Vesting of restricted stock units and issuance of stock under incentive plans $ 0 $ 0 136 0 136
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares) 0 13,821      
Increase in treasury stock resulting from shares withheld to cover statutory taxes $ 0 $ (43) 0 0 (43)
Exercise of stock options (in shares) 0 0      
Exercise of stock options $ 0 $ 0 0 0 0
Share-based compensation 0 0 1,231 0 1,231
Net (loss) income $ 0 $ 0 0 (5,179) (5,179)
Exercise of stock options (in shares) 0 0      
Exercise of stock options $ 0 $ 0 0 0 0
Balance (in shares) at Jun. 30, 2021 82,440,259 4,068,832      
Balance at Jun. 30, 2021 $ 41 $ (10,666) $ 415,325 $ (196,346) $ 208,354