Note 8 - Deferred Financing Costs (Details) - Deferred Financing Costs (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended		12 Months Ended
	Nov. 30, 2013	Nov. 30, 2013	Nov. 30, 2012	May 31, 2013
Deferred Revenue Arrangement [Line Items]
Balance at beginning of period		$ 39,449	$ 38,769	$ 38,769
Debt issuance costs				11,412
Loss on extinguishment of debt	(6,700)		(6,686)
Amortization		(3,136)		(5,107)
Balance at end of period	36,313	36,313		39,449
Deferred Financing Costs [Member]
Deferred Revenue Arrangement [Line Items]
Loss on extinguishment of debt				$ (5,625)