Note 7 - Goodwill - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Balance	$ 16,354	$ 16,354	$ 16,354
No change		0	0
Acquisition of TalentHerder	6,506
Balance	22,147	16,354	16,354
Engineering [Member]
Balance	11,918	11,918	11,918
No change		0	0
Acquisition of TalentHerder	0
Balance	11,918	11,918	11,918
Specialty Health Care [Member]
Balance	2,398	2,398	2,398
No change		0	0
Acquisition of TalentHerder	0
Balance	2,398	2,398	2,398
Information Technology [Member]
Balance	2,038	2,038	2,038
No change		0	0
Acquisition of TalentHerder	5,793
Balance	$ 7,831	$ 2,038	$ 2,038