Note 14 - Segment Information - Results of the Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Revenues	$ 50,812	$ 46,341
Cost of services	38,257	34,589
Gross profit	12,555	11,752
Selling, general and administrative	10,421	10,317
Depreciation and amortization	414	397
Operating income (loss)	1,720	1,038
Total assets	74,552	65,800	$ 73,279
Capital expenditures	289	92
Engineering [Member]
Revenues	21,418	19,224
Cost of services	15,724	14,185
Gross profit	5,694	5,039
Selling, general and administrative	4,122	4,037
Depreciation and amortization	283	285
Operating income (loss)	1,289	717
Total assets	36,578	32,014
Capital expenditures	109	69
Specialty Health Care [Member]
Revenues	22,634	18,507
Cost of services	17,384	13,947
Gross profit	5,250	4,560
Selling, general and administrative	4,470	3,927
Depreciation and amortization	105	72
Operating income (loss)	675	561
Total assets	24,884	17,867
Capital expenditures	40
Information Technology [Member]
Revenues	6,760	8,610
Cost of services	5,149	6,457
Gross profit	1,611	2,153
Selling, general and administrative	1,829	2,353
Depreciation and amortization	26	40
Operating income (loss)	(244)	(240)
Total assets	6,573	11,903
Capital expenditures	9
Corporate Segment [Member]
Revenues
Cost of services
Gross profit
Selling, general and administrative
Depreciation and amortization
Operating income (loss)
Total assets	6,517	4,016
Capital expenditures	$ 131	$ 23