Note 5 - Long-term Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Contractual interest	$ 832	$ 800	$ 2,618	$ 1,362
Amortization of original issuance discount and debt costs	67	83	133	168
Total interest expense related to long-term debt	$ 899	$ 883	$ 2,751	$ 1,530