Note 14 - Segment Information - Results of the Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Revenues	$ 284,680	$ 203,875	$ 150,409
Cost of services	201,753	150,751	111,554
Gross profit	82,927	53,124	38,855
Selling, general and administrative	53,395	42,019	37,791
Depreciation and amortization of property and equipment	995	1,007	1,065
Amortization of acquired intangible assets	46	95	321
Remeasurement of acquisition-related contingent consideration	(88)	(1,713)	0
Gain on sale of assets	(219)	(2,420)	0
Operating income	28,798	14,136	(10,950)
Total assets	87,964	72,852	68,339
Property and equipment acquired	1,152	1,576	460
Operating income		14,136
Write-off of receivables and professional fees incurred related to arbitration	0	0	8,397
Impairment of right of use assets and related costs	0	0	2,231
Specialty Health Care [Member]
Revenues	159,448	98,495	60,481
Cost of services	111,543	73,177	47,116
Gross profit	47,905	25,318	13,365
Selling, general and administrative	27,661	19,491	15,601
Depreciation and amortization of property and equipment	426	373	319
Amortization of acquired intangible assets	0	0	0
Remeasurement of acquisition-related contingent consideration	0	0
Gain on sale of assets	0	0
Operating income	19,818		(2,555)
Total assets	34,062	32,809	19,141
Property and equipment acquired	75	563	36
Operating income		5,454
Write-off of receivables and professional fees incurred related to arbitration			0
Impairment of right of use assets and related costs			0
Engineering [Member]
Revenues	85,937	66,172	57,715
Cost of services	64,218	50,109	41,227
Gross profit	21,719	16,063	16,488
Selling, general and administrative	17,272	14,210	13,021
Depreciation and amortization of property and equipment	455	521	638
Amortization of acquired intangible assets	0	95	321
Remeasurement of acquisition-related contingent consideration	(88)	(1,713)
Gain on sale of assets	(219)	(2,420)
Operating income	4,299		(5,889)
Total assets	33,447	28,343	33,782
Property and equipment acquired	657	481	26
Operating income		5,370
Write-off of receivables and professional fees incurred related to arbitration			8,397
Impairment of right of use assets and related costs			0
Life Sciences and IT [Member]
Revenues	39,295	39,208	32,213
Cost of services	25,992	27,465	23,211
Gross profit	13,303	11,743	9,002
Selling, general and administrative	8,462	8,318	9,169
Depreciation and amortization of property and equipment	114	113	108
Amortization of acquired intangible assets	46	0	0
Remeasurement of acquisition-related contingent consideration	0	0
Gain on sale of assets	0	0
Operating income	4,681		(275)
Total assets	15,778	8,676	7,498
Property and equipment acquired	124	173	48
Operating income		3,312
Write-off of receivables and professional fees incurred related to arbitration			0
Impairment of right of use assets and related costs			0
Corporate Segment [Member]
Revenues	0	0	0
Cost of services	0	0	0
Gross profit	0	0	0
Selling, general and administrative	0	0	0
Depreciation and amortization of property and equipment	0	0	0
Amortization of acquired intangible assets	0	0	0
Remeasurement of acquisition-related contingent consideration	0	0
Gain on sale of assets	0	0
Operating income	0		(2,231)
Total assets	4,677	3,024	7,918
Property and equipment acquired	$ 296	359	350
Operating income		$ 0
Write-off of receivables and professional fees incurred related to arbitration			0
Impairment of right of use assets and related costs			$ 2,231