Note 13 - Segment Information - Results of the Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021	Jan. 01, 2022
Revenues	$ 58,152	$ 45,471	$ 214,459	$ 138,953
Cost of services	40,794	33,257	151,998	103,623
Gross profit	17,358	12,214	62,461	35,330
Selling, general and administrative	12,551	10,382	39,962	29,566
Depreciation and amortization of property and equipment	266	250	729	775
Gain on sale of assets	(219)	(2,151)	(219)	(2,151)
Operating income	4,760	3,727	21,989	7,045
Total assets	76,809	70,291	76,809	70,291	$ 72,852
Capital expenditures	521	358	930	499
Amortization of acquired intangible assets	0	6	0	95
Operating income		3,727		7,045
Engineering [Member]
Revenues	20,922	16,482	61,726	47,882
Cost of services	15,594	12,694	45,653	36,875
Gross profit	5,328	3,788	16,073	11,007
Selling, general and administrative	4,531	3,834	12,659	10,570
Depreciation and amortization of property and equipment	136	120	332	428
Gain on sale of assets	(219)	(2,151)	(219)	(2,151)
Operating income	880		3,301
Total assets	32,343	29,020	32,343	29,020
Capital expenditures	207	16	496	55
Amortization of acquired intangible assets		6		95
Operating income		1,979		2,065
Specialty Health Care [Member]
Revenues	27,997	19,646	123,638	63,723
Cost of services	19,014	14,115	86,772	47,564
Gross profit	8,983	5,531	36,866	16,159
Selling, general and administrative	5,933	4,415	21,203	12,937
Depreciation and amortization of property and equipment	101	99	322	260
Gain on sale of assets	0	0	0	0
Operating income	2,949		15,341
Total assets	33,280	26,483	33,280	26,483
Capital expenditures	9	168	57	235
Amortization of acquired intangible assets		0		0
Operating income		1,017		2,962
Information Technology [Member]
Revenues	9,233	9,343	29,095	27,348
Cost of services	6,186	6,448	19,573	19,184
Gross profit	3,047	2,895	9,522	8,164
Selling, general and administrative	2,087	2,133	6,100	6,059
Depreciation and amortization of property and equipment	29	31	75	87
Gain on sale of assets	0	0	0	0
Operating income	931		3,347
Total assets	8,579	8,560	8,579	8,560
Capital expenditures	39	35	102	44
Amortization of acquired intangible assets		0		0
Operating income		731		2,018
Corporate Segment [Member]
Revenues	0	0	0	0
Cost of services	0	0	0	0
Gross profit	0	0	0	0
Selling, general and administrative	0	0	0	0
Depreciation and amortization of property and equipment	0	0	0	0
Gain on sale of assets	0	0	0	0
Operating income	0		0
Total assets	2,607	6,228	2,607	6,228
Capital expenditures	$ 266	139	$ 275	165
Amortization of acquired intangible assets		0		0
Operating income		$ 0		$ 0