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Note 12 - Geographic And Segment Information (Detail) - Net Sales By Geographic Location as a Percentage of Total Consolidated Net Sales: | 12 Months Ended
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Aug. 31, 2012 | Aug. 31, 2011
Net Sales, Percentage of Total | 100.00% | 100.00%
Inside the U.S.A to Unaffiliated Customers [Member] |  |
Net Sales, Percentage of Total | 64.00% | 63.20%
Joint Ventures In Which The Company Is A Shareholder Directly And Indirectly - Outside the U.S.A [Member] |  |
Net Sales, Percentage of Total | 12.10% | 16.50%
Unaffiliated Customers - Outside the U.S.A [Member] |  |
Net Sales, Percentage of Total | 23.90% | 20.30%

X
- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration