Note 10 - Retirement Savings Plan (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%	2.00%
Defined Contribution Plan, Cost	$ 94	$ 34