Note 14 - Segment Information - Results of the Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Revenues	$ 263,237	$ 284,680	$ 203,875
Cost of services	186,541	201,753	150,751
Gross profit	76,696	82,927	53,124
Selling, general and administrative	52,185	53,395	42,019
Depreciation and amortization of property and equipment	1,032	995	1,007
Amortization of acquired intangible assets	182	46	95
Gain on sale of assets	(395)	(219)	(2,420)
Operating income	23,692	28,798	14,136
Total assets	120,484	87,964	72,852
Property and equipment acquired	2,931	1,152	1,576
Remeasurement of acquisition-related contingent consideration	0	(88)	(1,713)
Operating income		28,798	14,136
Specialty Health Care [Member]
Revenues	136,241	159,448	98,495
Cost of services	96,309	111,543	73,177
Gross profit	39,932	47,905	25,318
Selling, general and administrative	26,010	27,661	19,491
Depreciation and amortization of property and equipment	383	426	373
Amortization of acquired intangible assets	0	0	0
Gain on sale of assets	0	0	0
Operating income	13,539
Total assets	43,769	34,062	32,809
Property and equipment acquired	141	75	563
Remeasurement of acquisition-related contingent consideration		0	0
Operating income		19,818	5,454
Engineering [Member]
Revenues	84,675	85,937	66,172
Cost of services	64,071	64,218	50,109
Gross profit	20,604	21,719	16,063
Selling, general and administrative	16,964	17,272	14,210
Depreciation and amortization of property and equipment	504	455	521
Amortization of acquired intangible assets	0	0	95
Gain on sale of assets	(395)	(219)	(2,420)
Operating income	3,531
Total assets	46,425	33,447	28,343
Property and equipment acquired	724	657	481
Remeasurement of acquisition-related contingent consideration		(88)	(1,713)
Operating income		4,299	5,370
Life Sciences and IT [Member]
Revenues	42,321	39,295	39,208
Cost of services	26,161	25,992	27,465
Gross profit	16,160	13,303	11,743
Selling, general and administrative	9,211	8,462	8,318
Depreciation and amortization of property and equipment	145	114	113
Amortization of acquired intangible assets	182	46	0
Gain on sale of assets	0	0	0
Operating income	6,622
Total assets	18,586	15,778	8,676
Property and equipment acquired	123	124	173
Remeasurement of acquisition-related contingent consideration		0	0
Operating income		4,681	3,312
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
Gain on sale of assets	0	0	0
Operating income	0
Total assets	11,704	4,677	3,024
Property and equipment acquired	$ 1,943	296	359
Remeasurement of acquisition-related contingent consideration		0	0
Operating income		$ 0	$ 0