Note 11 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands		Jun. 26, 2021	Dec. 26, 2020
Operating lease assets		$ 26,850	$ 29,203	[1]
Finance lease assets	[2]	486	486
Total lease assets		27,336	29,689
Total lease liabilities		$ 28,794	$ 31,253
Operating leases (Year)		7 years	7 years 3 months 18 days
Finance leases (Year)		2 years 2 months 12 days	2 years 3 months 18 days
Operating leases		6.30%	6.30%
Finance leases		0.60%	0.00%
Other Accrued Liabilities [Member]
Operating, current		$ 4,796	$ 5,287
Finance, current		185	179
Long-term Lease Liabilities [Member]
Operating, noncurrent		23,646	25,565
Finance, noncurrent		$ 167	$ 222

[1] Derived from December 26, 2020 audited financial statements

[2] Finance lease assets are recorded net of accumulated amortization of $0.1 million as of June 26, 2021 and December 26, 2020.