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Note 1 - Nature of Business and Significant Accounting Policies (Details) (USD $) | 12 Months Ended
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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% |

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