Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Income Statement [Abstract]
Revenue	$ 89,146	$ 100,408	$ 176,095	$ 197,646
Direct costs	70,408	82,072	140,311	161,594
Selling, general and administrative expenses	16,824	16,483	31,803	33,072
Operating income	1,914	1,853	3,981	2,980
Interest and other income	131	2	134	76
Gain on sale of building	824		824
Non-taxable life insurance gain	389		389
Interest and other expense	136	368	330	622
Income before income taxes	3,122	1,487	4,998	2,434
Provision for income taxes	1,363	544	2,095	859
Net income	$ 1,759	$ 943	$ 2,903	$ 1,575
Net income per share:
Basic	$ 0.13	$ 0.07	$ 0.21	$ 0.12
Diluted	$ 0.12	$ 0.07	$ 0.20	$ 0.11
Weighted average shares outstanding:
Basic	13,605	13,436	13,576	13,408
Diluted	14,282	13,918	14,299	13,851