Note 12 - Fair Value Measurements - Fair Values Financial Assets and Liabilities Measured on a Non-recurring Basis (Details) $ in Thousands	Feb. 28, 2017 USD ($)
Assets, Fair Value Disclosure, Nonrecurring	$ 4,963
Fair Value, Inputs, Level 2 [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Assets, Fair Value Disclosure, Nonrecurring	444
Fair Value, Inputs, Level 2 [Member] | Assets Held for Use [Member]
Assets, Fair Value Disclosure, Nonrecurring	$ 4,519