Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenue	$ 133,691	$ 131,161	$ 258,723	$ 253,608
Cost of revenue	111,118	108,726	218,471	211,785
Gross profit	22,573	22,435	40,252	41,823
General and administrative expenses	14,121	12,777	27,980	25,376
Sales and marketing expenses	1,106	461	1,831	856
Restructuring charges	2,495	0	2,930	0
Gain (loss) on change in fair value of contingent consideration, net	894	(96)	3,446	101
Operating income	5,745	9,101	10,957	15,692
Interest expense	(150)	534	536	972
Other expense	988	107	1,152	182
Income before income tax expense	4,907	8,460	9,269	14,538
Income tax expense	1,332	2,597	3,062	4,589
Net income	$ 3,575	$ 5,863	$ 6,207	$ 9,949
Basic weighted average shares outstanding (in shares)	16,510	16,717	16,565	16,729
Diluted weighted average shares outstanding (in shares)	16,601	16,833	16,657	16,837
Per common share data:
Basic earnings per share (in dollars per share)	$ 0.22	$ 0.35	$ 0.37	$ 0.59
Diluted earnings per share (in dollars per share)	$ 0.22	$ 0.35	$ 0.37	$ 0.59