Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenue	$ 301,210	$ 324,893	$ 369,478
Direct costs	245,127	265,711	302,318
Selling, general and administrative expenses	52,139	55,200	56,523
Goodwill impairment charges		37,329
Operating income (loss)	3,944	(33,347)	10,637
Interest and other income	88	188	79
Non-taxable life insurance gain	390		246
Interest and other expense	365	377	233
Income (loss) before income taxes	4,057	(33,536)	10,729
Provision for income taxes	3,251	1,102	4,219
Net income (loss)	$ 806	$ (34,638)	$ 6,510
Net income (loss) per share:
Basic	$ 0.05	$ (2.22)	$ 0.42
Diluted	$ 0.05	$ (2.22)	$ 0.41
Weighted average shares outstanding:
Basic	15,055	15,593	15,479
Diluted	15,324	15,593	15,920
Cash dividend per common share		$ 0.18	$ 0.24