Note 3 - Assets Held For Sale - Assets and Liabilities Held For Sale (Details) - Disposal Group, Held-for-sale, Not Discontinued Operations [Member] - USD ($) $ in Thousands	Dec. 26, 2020	Mar. 31, 2020	Dec. 28, 2019
Property, Plant and Equipment (net)	$ 11,375
Current Assets Held For Sale	$ 11,375	$ 0	$ 0