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Earnings per Share (Basic and Diluted) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Numerator:            
Net income $ 165 $ 4,082 $ 327 $ 98 $ 4,247 $ 425
Denominator for earnings per basic common share:            
Weighted average common shares outstanding (in shares) 13,237,000   13,134,000   13,197,000 13,100,000
Denominator for earnings per diluted common share:            
Dilutive effect of stock options and restricted stock (in shares) 243,000   328,000   251,000 268,000
Diluted weighted average shares (in shares) 13,480,000   13,462,000   13,448,000 13,368,000
Earnings per common share:            
Basic (in USD per share) $ 0.01   $ 0.02   $ 0.32 $ 0.03
Diluted (in USD per share) $ 0.01   $ 0.02   $ 0.32 $ 0.03
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) 168,334   216,669   175,587 207,591
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   $ 16.74   $ 14.89 $ 17.74
Exercise price of shares not included in the computation of dilutive income (loss) per share, upper limit (in USD per share) $ 33.36   $ 33.36   $ 33.36 $ 33.36