Earnings Per Share - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ 1,501	$ 1,035
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Denominator for basic earnings per share – weighted average shares (in shares)	8,375	8,035
Effect of dilutive securities:
Employee restricted stock and incentive stock options (in shares)	24	5
Denominator for diluted earnings (loss) per share – adjusted weighted average shares and assumed conversion (in shares)	8,399	8,040
Basic earnings per share (in usd per share)	$ 0.18	$ 0.13
Diluted earnings per share (in usd per shares)	$ 0.18	$ 0.13
Weighted average anti-dilutive employee restricted stock and incentive stock options (in shares)	260	0