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Note 11 - Geographic And Segment Information (Detail) - Net Sales By Segment: (USD $)
3 Months Ended 6 Months Ended
Feb. 28, 2013
Feb. 29, 2012
Feb. 28, 2013
Feb. 29, 2012
Net Sales $ 5,246,350 $ 4,974,328 $ 10,538,097 $ 9,806,442
ZERUST [Member]
       
Net Sales 4,710,412 4,570,779 9,505,695 9,023,425
Natur-Tec [Member]
       
Net Sales $ 535,938 $ 403,549 $ 1,032,402 $ 783,017