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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) 1,618,397 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) 0 210,683      
Increase in treasury stock resulting from shares withheld to cover statutory taxes $ 0 $ (490) 0 0 (490)
Share-based compensation 0 0 4,968 0 4,968
Net (loss) income $ 0 $ 0 0 2,029 2,029
Exercise of warrants by certain warrant holders (see Note 7) (in shares) 0 300,000      
Repurchase of shares into treasury stock (in shares) 0 657,673      
Repurchase of shares into treasury stock $ 0 $ (1,300) 0 0 (1,300)
Balance (in shares) at Sep. 30, 2020 80,260,475 3,936,755      
Balance at Sep. 30, 2020 $ 40 $ (9,974) 411,165 (185,087) 216,144
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
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 51,490 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 20,357      
Increase in treasury stock resulting from shares withheld to cover statutory taxes $ 0 $ (44) 0 0 (44)
Share-based compensation 0 0 1,204 0 1,204
Net (loss) income $ 0 $ 0 0 1,169 1,169
Exercise of warrants by certain warrant holders (see Note 7) (in shares) 300,000 300,000      
Balance (in shares) at Sep. 30, 2020 80,260,475 3,936,755      
Balance at Sep. 30, 2020 $ 40 $ (9,974) 411,165 (185,087) 216,144
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) 2,525,277 0      
Vesting of restricted stock units and issuance of stock under incentive plans $ 2 $ 0 1,494 0 1,496
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares) 0 143,913      
Increase in treasury stock resulting from shares withheld to cover statutory taxes $ 0 $ (719) 0 0 $ (719)
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 3,671 0 3,671
Net (loss) income $ 0 $ 0 0 (13,889) (13,889)
Balance (in shares) at Sep. 30, 2021 83,018,418 4,089,780      
Balance at Sep. 30, 2021 $ 42 $ (10,718) 417,852 (198,798) 208,378
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
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 578,159 0      
Vesting of restricted stock units and issuance of stock under incentive plans $ 1 $ 0 1,359 0 1,360
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares) 0 20,948      
Increase in treasury stock resulting from shares withheld to cover statutory taxes $ 0 $ (52) 0 0 (52)
Exercise of stock options (in shares) 0 0      
Exercise of stock options $ 0 $ 0 0 0 0
Share-based compensation 0 0 1,168 0 1,168
Net (loss) income $ 0 $ 0 0 (2,452) (2,452)
Balance (in shares) at Sep. 30, 2021 83,018,418 4,089,780      
Balance at Sep. 30, 2021 $ 42 $ (10,718) $ 417,852 $ (198,798) $ 208,378