Note 11 - Concentrations of Credit Risk, Significant Customers and Geographic Information - Significant Customers as a Percentage of Total Revenues (Details) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	12 Months Ended
	Dec. 31, 2022 Rate	Dec. 25, 2021 Rate
Customer A [Member]
A	21.00%	10.00%
Customer B [Member]
A	17.00%	23.00%
Customer C [Member]
A	15.00%	11.00%