Note 12 - Fair Value Measurements - Fair Values Financial Assets and Liabilities Measured on a Non-recurring Basis (Details) - USD ($) $ in Thousands	Jun. 06, 2017	May 31, 2016
Assets, Fair Value Disclosure, Nonrecurring	$ 16,979	$ 58,777
Fair Value, Inputs, Level 2 [Member] | Assets Held for Use [Member]
Assets, Fair Value Disclosure, Nonrecurring	13,480	56,101
Fair Value, Inputs, Level 2 [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Assets, Fair Value Disclosure, Nonrecurring	3,499	2,123
Fair Value, Inputs, Level 3 [Member] | Assets Held for Use [Member]
Assets, Fair Value Disclosure, Nonrecurring		$ 553