Note 9 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands		Sep. 28, 2019	Dec. 29, 2018	[1]
Operating lease assets		$ 34,096
Finance lease assets	[2]	2,482
Total lease assets		36,578
Operating		29,397
Total lease liabilities		$ 37,283
Operating leases (Year)		7 years 328 days
Finance leases (Year)		292 days
Operating leases		6.30%
Finance leases		4.50%
Other Accrued Liabilities [Member]
Operating		$ 5,358
Finance		$ 2,528

[1] Derived from December 29, 2018 audited financial statements

[2] Finance lease assets are recorded net of accumulated amortization of $0.1 million.