Note 14 - Segment Information - Results of the Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Dec. 28, 2019
Revenues	$ 45,033	$ 51,595
Cost of services	34,190	39,078
Gross profit	10,843	12,517
Selling, general and administrative	10,237	10,466
Depreciation and amortization	335	397
Write-off of receivables related to arbitration	8,047
Operating income (loss)	(7,776)	1,654
Total assets	83,951	92,811	$ 96,173
Capital expenditures	35	101
Engineering [Member]
Revenues	14,163	19,055
Cost of services	10,205	14,357
Gross profit	3,958	4,698
Selling, general and administrative	3,424	3,816
Depreciation and amortization	238	285
Write-off of receivables related to arbitration	8,047
Operating income (loss)	(7,751)	597
Total assets	43,690	48,158
Capital expenditures	9	62
Specialty Health Care [Member]
Revenues	22,197	24,171
Cost of services	17,812	18,533
Gross profit	4,385	5,638
Selling, general and administrative	4,400	4,495
Depreciation and amortization	77	91
Write-off of receivables related to arbitration
Operating income (loss)	(92)	1,052
Total assets	25,499	29,348
Capital expenditures	10	16
Information Technology [Member]
Revenues	8,673	8,369
Cost of services	6,173	6,188
Gross profit	2,500	2,181
Selling, general and administrative	2,413	2,155
Depreciation and amortization	20	21
Write-off of receivables related to arbitration
Operating income (loss)	67	5
Total assets	8,717	8,291
Capital expenditures	15	13
Corporate Segment [Member]
Revenues
Cost of services
Gross profit
Selling, general and administrative
Depreciation and amortization
Write-off of receivables related to arbitration
Operating income (loss)
Total assets	6,045	7,014
Capital expenditures	$ 1	$ 10