Note 10 - Income Taxes - Reconciliation of Income Tax Computed at U.S. Federal Statutory Tax Rate to Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Dec. 25, 2021
Tax provision at U.S. 21% statutory rate	$ 9,470	$ 26,610	$ 40,392
State income taxes, net of federal tax benefit	(633)	(1,535)	2,246
Accruals, adjustments and releases from statute expirations	579	348	(787)
Federal R&D credits	(1,360)	(1,679)	(943)
Stock-based compensation	(1,504)	(572)	(4,802)
Excess executive compensation	1,375	946	1,608
Change in valuation allowance	10,654	13,307	(9,882)
Exemption of PTG gain	0	0	(12,378)
Dividend, net of foreign tax credits	0	13	693
GILTI, net of foreign tax credits	1,735	3,458	9,343
Foreign rate differential	2,093	(6,131)	(1,023)
Other, net	(4,749)	(4,897)	552
Income Tax Expense (Benefit)	$ 17,660	$ 29,868	$ 25,019