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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, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Numerator:            
Net income $ 573 $ 357 $ 247 $ 225 $ 930 $ 472
Denominator for basic net income per common share:            
Weighted average common shares outstanding (in shares) 13,134,000   12,963,000   13,100,000 12,941,000
Denominator for diluted net income per share:            
Dilutive effect of stock options and restricted stock (in shares) 328,000   298,000   268,000 274,000
Diluted weighted average shares (in shares) 13,462,000   13,261,000   13,368,000 13,215,000
Earnings per common share:            
Basic (in USD per share) $ 0.04   $ 0.02   $ 0.07 $ 0.04
Diluted (in USD per share) $ 0.04   $ 0.02   $ 0.07 $ 0.04
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Number of shares not included in the computation of dilutive income per share (in shares) 215,834   83,417   205,834 83,417
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 per share, lower limit (in USD per share) $ 16.74   $ 28.15   $ 17.74 $ 28.15
Exercise price of shares not included in the computation of dilutive income per share, upper limit (in USD per share) $ 33.36   $ 33.36     $ 33.36