Note 5 - Long-term Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Contractual interest	$ 83	$ 1,328	$ 2,701	$ 2,690
Amortization of original issuance discount and debt costs	67	76	200	243
Total interest expense related to long-term debt	$ 150	$ 1,404	$ 2,901	$ 2,933