Note 9 - Changes in Deferred Financing Costs (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Aug. 31, 2016	May 31, 2016
Balance at beginning of period		$ 19,397	$ 26,399
Debt issuance costs (1)	[1]	5	118
Amortization		(1,740)	(7,120)
Balance at end of period		$ 17,662	$ 19,397

[1] Debt issuance costs are related to Amendment No. 6 of our credit agreement