Note 11 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands		Dec. 26, 2020	Dec. 28, 2019
Operating lease assets		$ 29,203	$ 33,269
Finance lease assets	[1]	486	2,515
Total lease assets		29,689	35,784
Total lease liabilities		$ 31,253	$ 36,909
Operating leases (Year)		7 years 3 months 18 days	7 years 10 months 24 days
Finance leases (Year)		2 years 3 months 18 days	6 months
Operating leases		6.30%	6.30%
Finance leases		0.00%	4.50%
Other Accrued Liabilities [Member]
Operating, current		$ 5,287	$ 5,458
Finance, current		179	2,574
Long-term Lease Liabilities [Member]
Operating, noncurrent		25,565	28,877
Finance, noncurrent		$ 222	$ 0

[1] Finance lease assets are recorded net of accumulated amortization of $48,000 and $0.1 million in 2020 and 2019, respectively.