Note 14 - Segment Information - Results of the Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020	Jan. 02, 2021
Revenues	$ 44,549	$ 45,033
Cost of services	33,699	34,190
Gross profit	10,850	10,843
Selling, general and administrative	9,069	10,237
Depreciation and amortization of property and equipment	266	255
Amortization of acquired intangible assets	80	80
Tax credit professional fees	60
Operating income (loss)	1,375	(7,776)
Total assets	77,770	83,951	$ 68,339
Capital expenditures	47	35
Depreciation and amortization	346	335
Write-off of receivables related to arbitration		8,047
Engineering [Member]
Revenues	14,466	14,163
Cost of services	11,260	10,205
Gross profit	3,206	3,958
Selling, general and administrative	3,074	3,424
Depreciation and amortization of property and equipment	156
Amortization of acquired intangible assets	80
Tax credit professional fees
Operating income (loss)	(104)	(7,751)
Total assets	35,898	43,690
Capital expenditures	9	9
Depreciation and amortization		238
Write-off of receivables related to arbitration		8,047
Specialty Health Care [Member]
Revenues	21,137	22,197
Cost of services	16,099	17,812
Gross profit	5,038	4,385
Selling, general and administrative	4,064	4,400
Depreciation and amortization of property and equipment	82
Amortization of acquired intangible assets
Tax credit professional fees
Operating income (loss)	892	(92)
Total assets	26,111	25,499
Capital expenditures	28	10
Depreciation and amortization		77
Write-off of receivables related to arbitration
Information Technology [Member]
Revenues	8,946	8,673
Cost of services	6,340	6,173
Gross profit	2,606	2,500
Selling, general and administrative	1,931	2,413
Depreciation and amortization of property and equipment	28
Amortization of acquired intangible assets
Tax credit professional fees
Operating income (loss)	647	67
Total assets	8,385	8,717
Capital expenditures	6	15
Depreciation and amortization		20
Write-off of receivables related to arbitration
Corporate Segment [Member]
Revenues
Cost of services
Gross profit
Selling, general and administrative
Depreciation and amortization of property and equipment
Amortization of acquired intangible assets
Tax credit professional fees	60
Operating income (loss)	(60)
Total assets	7,376	6,045
Capital expenditures	$ 4	1
Depreciation and amortization
Write-off of receivables related to arbitration