Note 1 - Summary of Significant Accounting Policies - Significant Customer Concentration Information (Details) - Customer Concentration Risk [Member] - Revenue Benchmark [Member] - Semiconductor Test and Inspection [Member]	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Customers individually accounting for more than 10% of net sales	1	2
One Customer [Member]
Percentage of net sales	10.00%	24.00%