Note 9 - Goodwill (Details) - Changes in the Carrying Amount of Goodwill by Segment - May. 31, 2015 - USD ($) $ in Thousands	Total	Total
Goodwill [Line Items]
Balance at August 31, 2014		$ 285,608
Balance at May 31, 2015	$ 307,231	307,231
Foreign currency translations		(10,812)
UNITED STATES
Goodwill [Line Items]
Balance at August 31, 2014		179,434
Balance at May 31, 2015	211,869	211,869
Foreign currency translations		0
Europe [Member]
Goodwill [Line Items]
Balance at August 31, 2014		103,032
Balance at May 31, 2015	92,732	92,732
Foreign currency translations		(10,300)
Asia Pacific [Member]
Goodwill [Line Items]
Balance at August 31, 2014		3,142
Balance at May 31, 2015	2,630	2,630
Foreign currency translations		(512)
Code Red, Inc. [Member]
Goodwill [Line Items]
Balance at May 31, 2015	29,627	29,627
Goodwill acquired during the period	$ 32,400	32,435
Code Red, Inc. [Member] | UNITED STATES
Goodwill [Line Items]
Goodwill acquired during the period		32,435
Code Red, Inc. [Member] | Europe [Member]
Goodwill [Line Items]
Goodwill acquired during the period		0
Code Red, Inc. [Member] | Asia Pacific [Member]
Goodwill [Line Items]
Goodwill acquired during the period		$ 0