Note 10 - Information Concerning Product Lines, Geographic Information and Revenue Concentration - Customer and Distributor Concentration of Accounts Receivable (Details) - Customer Concentration Risk [Member] - Accounts Receivable [Member]	9 Months Ended	12 Months Ended
	Oct. 02, 2022	Jan. 02, 2022
Distributor "A" [Member]
Concentration risk percentage		42.00%
Distributor "B" [Member]
Concentration risk percentage		22.00%
Distributor "C" [Member]
Concentration risk percentage		17.00%
Customer "A" [Member]
Concentration risk percentage	28.00%
Customer "C" [Member]
Concentration risk percentage	18.00%
Customer "F" [Member]
Concentration risk percentage	30.00%	10.00%