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Note 1 - Nature of Business and Significant Accounting Policies (Details) (USD $)
 12 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Number of Countries in which Entity Operates 60  
Number of Joint Venture Arrangements 23  
Deferred Revenue, Current (in Dollars) $ 288,000 $ 288,000
Allowance for Doubtful Accounts Receivable (in Dollars) 20,000 20,000
Reimbursements Related To Certain Research And Development Contracts (in Dollars) 274,728 365,940
Reimbursements Related To Certain Research And Development Contracts (in Dollars) 274,728 365,940
Other Accrued Liabilities, Current (in Dollars) 189,263 251,350
Zerust Brazil [Member]
    
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Noncontrolling Interest, Ownership Percentage by Parent 15.00%  
Equity Method Investment, Ownership Percentage 85.00%  
Research And Development [Member]
    
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Other Accrued Liabilities, Current (in Dollars) 0 96,861
Building and Building Improvements [Member] | Maximum [Member]
    
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Property, Plant and Equipment, Useful Life 30 years  
Building and Building Improvements [Member] | Minimum [Member]
    
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Property, Plant and Equipment, Useful Life 5 years  
Machinery and Equipment [Member] | Maximum [Member]
    
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Property, Plant and Equipment, Useful Life 10 years  
Machinery and Equipment [Member] | Minimum [Member]
    
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Property, Plant and Equipment, Useful Life 3 years  
Joint Venture Fees [Member]
    
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Deferred Revenue, Current (in Dollars) $ 288,000 $ 288,000
NTI ASEAN [Member]
    
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Noncontrolling Interest, Ownership Percentage by Parent 40.00%  
Equity Method Investment, Ownership Percentage 60.00%  
Maximum [Member]
    
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]    
Noncontrolling Interest, Ownership Percentage by Parent 50.00%