Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 392,285	$ 366,091	$ 394,170
Direct costs	305,835	289,133	319,135
Selling, general and administrative expenses	73,708	67,828	68,123
Operating income	12,742	9,130	6,912
Interest and other income	587	506	311
Gain on sale of building		824
Non-taxable life insurance gain		987
Interest and other expense	1,592	786	934
Income before income taxes	11,737	10,661	6,289
Provision (benefit) for income taxes	(1,993)	3,022	2,164
Net income	$ 13,730	$ 7,639	$ 4,125
Net income per share:
Basic	$ 0.99	$ 0.56	$ 0.31
Diluted	$ 0.92	$ 0.53	$ 0.29
Weighted average shares outstanding:
Basic	13,926	13,621	13,450
Diluted	14,971	14,427	13,997