Computation of Earnings per Share - Summary of net income per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income	$ 635	$ 272
Shares outstanding:
Weighted average common shares outstanding (in shares)	22,993	22,866
Additional dilutive common stock equivalents (in shares)	12	21
Diluted shares outstanding (in shares)	23,005	22,887
Net income per share - basic (in dollars per share)	$ 0.03	$ 0.01
Net income per share - diluted (in dollars per share)	$ 0.03	$ 0.01