Note 9 - Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands		Jun. 27, 2020	Dec. 28, 2019
2020, operating leases	[1]	$ 3,777
2020, finance leases		2,629
2020, total		6,406
2021, operating leases	[1]	6,646
2021, finance leases		125
2021, total		6,771
2022, operating leases	[1]	5,848
2022, finance leases		125
2022, total		5,973
2023, operating leases	[1]	5,090
2023, finance leases		10
2023, total		5,100
2024, operating leases		4,736
2024, finance leases		0
2024, total		4,736
Thereafter, operating leases	[1]	16,225
Thereafter, finance leases		0
Thereafter, total		16,225
Total lease payments, operating leases	[1]	42,322
Total lease payments, finance leases		2,889
Total lease payments, total		45,211
Less: Interest, operating leases	[1]	(9,626)
Less: Interest, finance leases		0
Less: Interest, total		(9,626)
Present value of lease liabilities, operating leases	[1]	32,696
Present value of lease liabilities, finance leases		2,889
Present value of lease liabilities, total		$ 35,585	$ 36,909

[1] Excludes sublease income of $0.1 million in 2021.