Note 4 - Related Party Transactions (Details) (TPG Capital, L.P. [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014	May 31, 2012	May 31, 2014
TPG Capital, L.P. [Member]
Note 4 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction	$ 0.9	$ 1.0	$ 2.9	$ 2.9	$ 3.0
Due to Related Parties	$ 0.8		$ 0.8			$ 0.9