Note 9 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands		Mar. 28, 2020	Dec. 28, 2019
Operating lease assets		$ 32,599	$ 33,269	[1]
Finance lease assets	[2]	2,865	2,515
Total lease assets		35,464	35,784
Operating, noncurrent		28,103	28,877
Finance, noncurrent		249
Total lease liabilities		$ 36,632	$ 36,909
Operating leases (Year)		7 years 255 days	7 years 328 days
Finance leases (Year)		219 days	182 days
Operating leases		6.30%	6.30%
Finance leases		3.90%	4.50%
Other Accrued Liabilities [Member]
Operating, current		$ 5,592	$ 5,458
Finance, current		$ 2,688	$ 2,574

[1] Derived from December 28, 2019 audited financial statements

[2] Finance lease assets are recorded net of accumulated amortization of $0.1 million as of March 28, 2020 and December 28, 2019.