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Note 11 - Geographic And Segment Information (Details) - Net Sales By Segment (USD $)
3 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]    
Net Sales $ 6,309,100 $ 5,291,747
ZERUST [Member]
   
Segment Reporting, Revenue Reconciling Item [Line Items]    
Net Sales 5,749,013 4,795,283
Natur-Tec [Member]
   
Segment Reporting, Revenue Reconciling Item [Line Items]    
Net Sales $ 560,087 $ 496,464