Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net service revenues	$ 190,216	$ 138,507
Cost of service revenues	134,381	101,680
Gross profit	55,835	36,827
General and administrative expenses	42,287	29,257
Depreciation and amortization	2,887	2,074
Total operating expenses	45,174	31,331
Operating income	10,661	5,496
Interest income	(334)	(215)
Interest expense	908	618
Total interest expense, net	574	403
Income before income taxes	10,087	5,093
Income tax expense	1,429	797
Net income	$ 8,658	$ 4,296
Net income per common share
Basic income per share	$ 0.56	$ 0.33
Diluted income per share	$ 0.54	$ 0.32
Weighted average number of common shares and potential common shares outstanding:
Basic	15,519	12,995
Diluted	15,907	13,381