Note 11 - Fair Value (Details) - Contingent Consideration Liability (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 30, 2013	Aug. 31, 2013	Nov. 30, 2013	Nov. 30, 2012	May 31, 2013
Contingent Consideration Liability [Abstract]
Balance at the beginning of the period		$ (4,504)	$ (4,504)
Additions due to acquisitions					(4,400)
Change in fair value	3,300	1,300	4,638	0
Accretion of fair value	(67)		(134)		(104)
Balance at the end of the period					$ (4,504)