Note 11 - Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands		Mar. 26, 2022	Dec. 25, 2021
2022, operating leases	[1]	$ 4,866
2022, finance leases		121
2022, total		4,987
2023, operating leases	[1]	5,761
2023, finance leases		50
2023, total		5,811
2024, operating leases	[1]	5,302
2024, finance leases		11
2024, total		5,313
2025, operating leases	[1]	5,088
2025, finance leases		11
2025, total		5,099
2026, operating leases		2,765
2026, finance leases		3
2026, total		2,768
Thereafter, operating leases	[1]	9,729
Thereafter, finance leases		0
Thereafter, total		9,729
Total lease payments, operating leases	[1]	33,511
Total lease payments, finance leases		196
Total lease payments, total		33,707
Less: Interest, operating leases	[1]	(6,817)
Less: Interest, finance leases		(3)
Less: Interest, total		(6,820)
Present value of lease liabilities, finance leases		193
Present value of lease liabilities, total		26,887	$ 27,093
Other Accrued Liabilities and Long-term Lease Liabilities [Member]
Present value of lease liabilities, operating leases	[1]	$ 26,694

[1] Excludes sublease income of $0.1 million in 2022 and 2023.