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(Loss) Earnings per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Numerator:                
Net (loss) income $ (1,257) $ (1,918) $ (394) $ (562) $ 165 $ 4,082 $ (3,569) $ 3,685
Denominator for (loss) earnings per basic common share:                
Weighted average common shares outstanding (in shares) 13,121,000     13,248,000     13,225,000 13,214,000
Denominator for (loss) earnings per diluted common share:                
Weighted average common shares outstanding (in shares) 13,121,000     13,248,000     13,225,000 13,214,000
Dilutive effect of stock options and restricted stock/units (in shares) 0     0     0 257,000
Diluted weighted average shares (in shares) 13,121,000     13,248,000     13,225,000 13,471,000
(Loss) earnings per common share:                
Basic (in dollars per share) $ (0.10)     $ (0.04)     $ (0.27) $ 0.28
Diluted (in dollars per share) $ (0.10)     $ (0.04)     $ (0.27) $ 0.27
Restricted Stock                
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                
Number of shares not included in the computation of dilutive income (loss) per share (in shares) 276,319     262,781     276,319 10,774
Stock Options                
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                
Number of shares not included in the computation of dilutive income (loss) per share (in shares) 145,334     171,900     145,334 166,334