Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 147,954	$ 133,277	$ 127,982
Insurance recoveries		533
Operating expenses:
Direct	52,350	49,187	46,435
Selling, general and administrative	38,960	34,441	32,973
Depreciation, amortization and impairment	6,374	7,505	5,539
Total operating expenses	97,684	91,133	84,947
Operating income	50,270	42,677	43,035
Other income (expense):
Interest income	14	18	37
Interest expense	(1,667)	(1,813)	(2,091)
Other, net	4	585	(462)
Total other income (expense)	(1,649)	(1,210)	(2,516)
Income before income taxes	48,621	41,467	40,519
Provision for income taxes	11,155	4,207	8,113
Net income	$ 37,466	$ 37,260	$ 32,406
Earnings per share of common stock:
Basic earnings per share (in dollars per share)	$ 1.47	$ 1.48	$ 1.30
Diluted earnings per share (in dollars per share)	$ 1.46	$ 1.45	$ 1.26
Weighted average shares and share equivalents outstanding
Basic (in shares)	25,422	25,170	24,809
Diluted (in shares)	25,640	25,696	25,653