Note 6 - Leases - Supplemental Balance Sheet Information (Details) $ in Thousands	Feb. 29, 2020 USD ($)
Current operating lease liabilities	$ 9,477
Noncurrent operating lease liabilities	17,068
Total operating lease liabilities	26,545
Other Noncurrent Assets [Member]
Operating lease right of use assets	26,669
Other Accrued Expenses [Member]
Current operating lease liabilities	9,477
Other Noncurrent Liabilities [Member]
Noncurrent operating lease liabilities	$ 17,068