Note 1 - Nature of Business and Basis of Presentation (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Nov. 30, 2013	May 31, 2013	Nov. 30, 2013 Due to Change in Provision of Allowance for Doubtful Accounts [Member]	Nov. 30, 2013 Due to Change in Depreciable Lives of Property and Equipment [Member] Annual [Member]	Nov. 30, 2013 Due to Change in Depreciable Lives of Property and Equipment [Member]	Nov. 30, 2013 Due to Change in Depreciable Lives of Property and Equipment [Member]
Note 1 - Nature of Business and Basis of Presentation (Details) [Line Items]
Change in Bad Debt Expense			$ (1.9)
Changes in Net Income (Loss)			1.1	3.6	0.9	1.8
Property, Plant and Equipment, Useful Life	10 years	5 years
Changes in Depreciation Expense				$ (6.3)	$ (1.6)	$ (3.1)