Note 1 - Basis of Presentation and Significant Accounting Policies (Details Textual)	6 Months Ended	12 Months Ended
	Jul. 02, 2022	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Number of Operating Segments		1
Production Equipment and Software [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years
Production Equipment and Software [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		5 years
Tools, Dies and Molds [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		1 year
Tools, Dies and Molds [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years
Revenue Benchmark [Member] | Sell-through Distributors Concentration Risk [Member]
Number of Distributors	2
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Weikeng Group [Member]
Concentration Risk, Percentage		30.00%	37.00%	35.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Arrow Electronics Inc [Member]
Concentration Risk, Percentage		28.00%	27.00%	25.00%
Accounts Receivable [Member] | Sell-through Distributors Concentration Risk [Member] | Large Distributor Two [Member]
Concentration Risk, Percentage			28.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Weikeng Group [Member]
Concentration Risk, Percentage		47.00%	59.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Arrow Electronics Inc [Member]
Concentration Risk, Percentage		27.00%