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Earnings per Share (Basic and Diluted) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Numerator:                
Net income (loss) $ (562) $ 165 $ 4,082 $ (12,579) $ 327 $ 98 $ 3,685 $ (12,154)
Denominator for (loss) earnings per basic common share:                
Weighted average common shares outstanding (in shares) 13,248,000     13,137,000     13,214,000 13,112,000
Denominator for (loss) earnings per diluted common share:                
Dilutive effect of stock options and restricted stock (in shares) 0     0     257,000 0
Diluted weighted average shares (in shares) 13,248,000     13,137,000     13,471,000 13,112,000
Earnings per common share:                
Basic (in USD per share) $ (0.04)     $ (0.96)     $ 0.28 $ (0.93)
Diluted (in USD per share) $ (0.04)     $ (0.96)     $ 0.27 $ (0.93)
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)             171,900  
Antidilutive Effect                
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                
Exercise price of shares not included in the computation of dilutive income (loss) per share, lower limit (in USD per share)             $ 14.89  
Exercise price of shares not included in the computation of dilutive income (loss) per share, upper limit (in USD per share)             $ 33.36