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Note 1 - Nature of Business and Significant Accounting Policies (Details Textual) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 28, 2019 | Jun. 03, 2019 | Aug. 31, 2019 USD ($) | Aug. 31, 2018 USD ($)
Number of Countries in which Entity Operates |  |  | 60 |
Number of Operating Segments |  |  | 2 |
Accounts Receivable, Allowance for Credit Loss, Ending Balance |  |  | $ 65,000 | $ 50,000
Stockholders' Equity Note, Stock Split, Conversion Ratio | 2 | 2 |  |
Natur-Tech India [Member] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 75.00% |
Natur Tec Lanka [Member] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 75.00% |
Zerust Brazil [Member] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 85.00% |
NTI Asean LLC [Member] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 60.00% |
Maximum [Member] | Various Joint Ventures [Member] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 50.00% |

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