Note 11 - Intangible Assets (Details Textual) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 16, 2015	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015	Aug. 31, 2015
Portware LLC [Member]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				10 years 255 days
Finite-lived Intangible Assets Acquired	$ 75,500,000			$ 75,500,000
Acquired Finite-lived Intangible Asset, Residual Value		$ 0		0
Impairment of Intangible Assets (Excluding Goodwill)				$ 0		$ 0
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				11 years 146 days
Amortization of Intangible Assets		$ 4,100,000	$ 2,300,000	$ 11,100,000	$ 6,400,000