Note 17 - Share-Based Compensation (Details) - Restricted Stock Activity (USD $)	6 Months Ended	12 Months Ended
	Nov. 30, 2011	May 31, 2013 Restricted Stock [Member]	May 31, 2013 Stock Appreciation Rights (SARs) [Member]
Note 17 - Share-Based Compensation (Details) - Restricted Stock Activity [Line Items]
Outstanding at May 31, 2012		2,100	87,000
Outstanding at May 31, 2012 (in Dollars per share)		$ 78.64	$ 20.59
Granted		1,600	63,300
Granted (in Dollars per share)	$ 19.85	$ 78.64	$ 20.59
Vested		(800)	0
Vested (in Dollars per share)		$ 78.64	$ 0
Forfeited		0	(18,000)
Forfeited (in Dollars per share)		$ 0	$ 20.59
Cancelled/Expired			(5,000)
Cancelled/Expired (in Dollars per share)			$ 20.59
Outstanding at May 31, 2013		2,900	127,300
Outstanding at May 31, 2013 (in Dollars per share)		$ 78.64	$ 20.59