CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenues	$ 49,543	$ 44,292	$ 143,214	$ 132,519
Cost of revenues	37,214	33,582	107,996	100,656
Gross profit	12,329	10,710	35,218	31,863
Selling, general and administrative expenses:
Operating expenses	9,259	8,204	27,768	23,830
Impairment of goodwill				7,738
Revaluation of contingent consideration liability			(6,069)	(9,106)
Total selling, general and administrative expenses	9,259	8,204	21,699	22,462
Income from operations	3,070	2,506	13,519	9,401
Interest income (expense), net	(413)	(535)	(1,420)	(1,623)
Other income (expense), net	33	108	(21)	77
Income before income taxes	2,690	2,079	12,078	7,855
Income tax expense	741	459	3,207	2,038
Net income	$ 1,949	$ 1,620	$ 8,871	$ 5,817
Earnings per share:
Basic	$ 0.18	$ 0.15	$ 0.80	$ 0.53
Diluted	$ 0.17	$ 0.14	$ 0.79	$ 0.52
Weighted average common shares outstanding:
Basic	11,039	10,966	11,022	10,938
Diluted	11,205	11,217	11,198	11,153