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Note 1 - Nature of Business and Significant Accounting Policies (Details Textual) | 12 Months Ended |
--- | --- | ---
Aug. 31, 2016 USD ($) | Aug. 31, 2015 USD ($)
Maximum [Member] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 50.00% |
Zerust Brazil [Member] |  |
Equity Method Investment, Ownership Percentage | 85.00% |
NTI Asean LLC [Member] |  |
Equity Method Investment, Ownership Percentage | 60.00% |
NaturTec [Member] |  |
Equity Method Investment, Ownership Percentage | 90.00% |
Allowance for Doubtful Accounts Receivable | $ 40,000 | $ 40,000
Number of Countries in which Entity Operates | 60 |
Number of Operating Segments | 2 |
Number of Joint Venture Arrangements | 19 |

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- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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