Note 3 - Related Party Transactions (Details) (TPG Capital, L.P. [Member], USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Aug. 31, 2011	Feb. 28, 2014	Feb. 28, 2013	May 31, 2013
TPG Capital, L.P. [Member]
Note 3 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction			$ 3.0
Investment Advisory, Management and Administrative Fees	1.0	1.1		2.9	3.3
Due to Related Parties	$ 0.9			$ 0.9		$ 0.6