Note 14 - Segment Information - Results of the Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019
Revenues	$ 32,652	$ 50,705	$ 77,685	$ 102,300
Cost of services	24,149	37,902	58,339	76,980
Gross profit	8,503	12,803	19,346	25,320
Selling, general and administrative	8,994	10,202	19,231	20,667
Depreciation and amortization	326	408	661	805
Write-off of receivables and professional fees incurred related to arbitration	350		8,397
Operating income (loss)	(1,167)	2,193	(8,943)	3,848
Total assets	70,178	92,099	70,178	92,099	$ 96,173
Capital expenditures	116	137	151	238
Engineering [Member]
Revenues	14,038	18,583	28,201	37,638
Cost of services	9,804	13,324	20,001	27,682
Gross profit	4,234	5,259	8,200	9,956
Selling, general and administrative	3,349	3,675	6,723	7,491
Depreciation and amortization	234	302	472	586
Write-off of receivables and professional fees incurred related to arbitration	350		8,397
Operating income (loss)	301	1,282	(7,392)	1,879
Total assets	40,699	50,520	40,699	50,520
Capital expenditures	21	25	30	87
Specialty Health Care [Member]
Revenues	10,684	23,370	32,881	47,540
Cost of services	8,487	18,057	26,311	36,593
Gross profit	2,197	5,313	6,570	10,947
Selling, general and administrative	3,208	4,285	7,682	8,779
Depreciation and amortization	70	86	147	177
Write-off of receivables and professional fees incurred related to arbitration
Operating income (loss)	(1,081)	942	(1,259)	1,991
Total assets	15,570	28,030	15,570	28,030
Capital expenditures		88	10	104
Information Technology [Member]
Revenues	7,930	8,752	16,603	17,122
Cost of services	5,858	6,521	12,027	12,705
Gross profit	2,072	2,231	4,576	4,417
Selling, general and administrative	2,437	2,242	4,826	4,397
Depreciation and amortization	22	20	42	42
Write-off of receivables and professional fees incurred related to arbitration
Operating income (loss)	(387)	(31)	(292)	(22)
Total assets	7,815	8,028	7,815	8,028
Capital expenditures	20	4	35	17
Corporate Segment [Member]
Revenues
Cost of services
Gross profit
Selling, general and administrative
Depreciation and amortization
Write-off of receivables and professional fees incurred related to arbitration
Operating income (loss)
Total assets	6,094	5,521	6,094	5,521
Capital expenditures	$ 75	$ 20	$ 76	$ 30