Note 5 - Business Acquisition (Details Textual) - USD ($)	12 Months Ended
	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019	Jan. 02, 2020
Goodwill, Ending Balance	$ 185,000	$ 185,000
Sensi ML [Member]
Revenues, Total	184,000	175,000	$ 126,000
Amortization of Intangible Assets, Total	$ 107,000	$ 148,000	148,000
Business Combination, Acquisition Related Costs			104,000
Goodwill, Ending Balance			$ 185,000
Escrow Deposit				$ 200,000