Note 1 - Basis of Presentation (Details Textual) - Sell-through Distributors Concentration Risk [Member]	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024	Dec. 28, 2024
Revenue Benchmark [Member] | Distributors [Member]
Concentration Risk, Percentage	83.00%	95.00%	82.00%	91.00%
Accounts Receivable [Member]
Number of Distributors			2		2
Accounts Receivable [Member] | Large Distributor One [Member]
Concentration Risk, Percentage			52.00%		45.00%
Accounts Receivable [Member] | Large Distributor Two [Member]
Concentration Risk, Percentage			35.00%		36.00%