Note 8 - Goodwill and Other Intangible Assets (Detail) - Gross Carrying Values And Accumulated Amortization Of Amortizable Intangible Assets (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Nov. 30, 2011
Patented Technology [Member]
 
Balance at August 31, 2011 $ 41,957
Balance at August 31, 2011 (27,735)
Balance at November 30, 2011 41,915
Balance at November 30, 2011 (28,422)
Currency translation adjustments (42)
Currency translation adjustments 12
Amortization (699)
Customer Relationships [Member]
 
Balance at August 31, 2011 5,016
Balance at August 31, 2011 (2,096)
Balance at November 30, 2011 4,978
Balance at November 30, 2011 (2,250)
Currency translation adjustments (38)
Currency translation adjustments $ (154)