Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenue	$ 92,667	$ 75,521	$ 175,380	$ 152,527
Direct costs	74,999	61,864	141,873	124,641
Selling, general and administrative expenses	16,023	12,845	31,279	25,674
Operating income	1,645	812	2,228	2,212
Interest and other income	7	11	159	53
Interest and other expense	349	173	555	338
Income before income taxes	1,303	650	1,832	1,927
Provision for income taxes	363	216	478	742
Net income	$ 940	$ 434	$ 1,354	$ 1,185
Net income per share:
Basic	$ 0.07	$ 0.03	$ 0.10	$ 0.08
Diluted	$ 0.07	$ 0.03	$ 0.09	$ 0.08
Weighted average shares outstanding:
Basic	13,756	15,142	14,217	15,219
Diluted	14,453	15,479	14,871	15,454