Note 9 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands		Mar. 30, 2019	Dec. 29, 2018	[1]
Operating lease assets		$ 29,782
Finance lease assets	[2]	2,597
Total lease assets		32,379
Operating		23,818
Finance		2,577
Total lease liabilities		$ 31,927
Operating leases (Year)		6 years 255 days
Finance leases (Year)		1 year 109 days
Operating leases		5.90%
Finance leases		4.50%
Other Accrued Liabilities [Member]
Operating		$ 5,498
Finance		$ 34

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

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