Note 10 - Provision for Taxes - Net Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Valuation reserves	$ 1,167	$ 1,248
Stock based compensation	389	329
Federal and state credits	674	339
Lease obligation	2,252	515
Other	4	34
Capitalized research costs	605	0
Total assets	5,091	2,465
Property and equipment	(1,502)	(1,474)
Goodwill and intangible assets	(5,347)	(4,973)
Lease – right of use asset	(2,127)	(517)
Prepaid insurance	(280)	(237)
Total liabilities	(9,256)	(7,201)
Beginning balance	(23)	(27)
(Increase) Decrease during period	(328)	4
Ending balance	(351)	(23)
Deferred Tax Liabilities, Net, Total	$ (4,516)	$ (4,759)