Note 9 - 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. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Tax provision at U.S. 21% statutory rate	$ 26,610	$ 40,392	$ (2,757)
State income taxes, net of federal tax benefit	(1,535)	2,246	(1,160)
Settlements, adjustments and releases from statute expirations	348	(787)	(118)
Federal R&D credits	(1,679)	(943)	(46)
Stock-based compensation	(572)	(4,802)	727
Excess executive compensation	946	1,608	491
Change in valuation allowance	13,307	(9,882)	(1,691)
Exemption of PTG gain	0	(12,378)	0
Dividend, net of foreign tax credits	13	693	1,224
GILTI, net of foreign tax credits	3,458	9,343	4,191
Foreign rate differential	(6,131)	(1,023)	(1,512)
Other, net	(4,897)	552	1,317
Income Tax Expense (Benefit), Total	$ 29,868	$ 25,019	$ 666