Note 14 - Share-based Compensation (Details) - Option Activity	3 Months Ended
	Aug. 31, 2015 USD ($) $ / shares shares
Note 14 - Share-based Compensation (Details) - Option Activity [Line Items]
Granted (in Shares)	279,247
Employee Stock Option [Member]
Note 14 - Share-based Compensation (Details) - Option Activity [Line Items]
Service-based options outstanding at May 31, 2015 (in Shares)	158,329
Service-based options outstanding at May 31, 2015 | $ / shares	$ 100.00
Granted (in Shares)	279,247
Granted | $ / shares	$ 100.00
Forfeited (in Shares)	(3,000)
Forfeited | $ / shares	$ 100.00
Expired or cancelled | $ / shares	$ 100.00
Service-based options outstanding at August 31, 2015 (in Shares)	434,576
Service-based options outstanding at August 31, 2015 | $ / shares	$ 100.00
Service-based options outstanding at August 31, 2015	8 years 292 days
Service-based options outstanding at August 31, 2015 (in Dollars) | $		[1]
Exercisable at August 31, 2015 (in Shares)	107,633
Exercisable at August 31, 2015 | $ / shares	$ 100.00
Exercisable at August 31, 2015	6 years 219 days
Exercisable at August 31, 2015 (in Dollars) | $		[1]

[1] The aggregate intrinsic value in the above table represents the total pre-tax amount that a participant would receive if the option had been exercised on the last day of the respective fiscal year. Options with a market value less than its exercise value are not included in the intrinsic value amount.