Note 1 - Basis of Presentation and Significant Accounting Policies (Details Textual)	12 Months Ended
	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
Accounts Receivable [Member] | Weikeng Group [Member] | Customer Concentration Risk [Member]
Concentration Risk, Percentage	59.00%	47.00%
Accounts Receivable [Member] | Arrow Electronics Inc [Member] | Customer Concentration Risk [Member]
Concentration Risk, Percentage	28.00%	45.00%