Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenue	$ 125,032	$ 122,447
Cost of revenue	107,353	103,059
Gross profit	17,679	19,388
Selling, general and administrative expenses	14,584	12,994
Restructuring charges	435	0
Gain on change in fair value of contingent consideration, net	2,552	197
Operating income	5,212	6,591
Interest expense	686	438
Other expense	164	75
Income before income tax expense	4,362	6,078
Income tax expense	1,730	1,992
Net income	$ 2,632	$ 4,086
Basic weighted average shares outstanding (in shares)	16,619	16,741
Diluted weighted average shares outstanding (in shares)	16,713	16,841
Per common share data:
Basic earnings per share (in dollars per share)	$ 0.16	$ 0.24
Diluted earnings per share (in dollars per share)	$ 0.16	$ 0.24