Note 8 - Deferred Financing Costs (Detail) - Changes in Deferred Financing Costs (USD $)	6 Months Ended
	Nov. 30, 2012	May 31, 2012
Balance at beginning of period	$ 38,769,000
Debt issuance costs (See Note 9)	2,528,000	42,474,000
Loss on extinguishment of debt	(6,686,000)
Amortization	(2,389,000)	(3,705,000)
Balance at end of period	34,955,000	38,769,000
Deferred Financing Costs [Member]
Loss on extinguishment of debt	$ (3,953,000)