Note 5 - Property and Equipment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended	6 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013	May 31, 2013	Feb. 28, 2014 Annual [Member] Service Life [Member]	Feb. 28, 2014 Annual [Member] Service Life [Member]	Feb. 28, 2014 Service Life [Member]	Feb. 28, 2014 Service Life [Member]
Note 5 - Property and Equipment (Details) [Line Items]
Depreciation	$ 4.5	$ 5.3	$ 13.2	$ 15.4		$ (6.3)	$ (6.3)	$ (1.6)	$ (4.7)
Property, Plant and Equipment, Useful Life			10 years		5 years