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Note 7 - Investments in Joint Ventures (Details Textual) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
May. 31, 2014 | Aug. 31, 2014 | Nov. 30, 2013 | Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014 | Aug. 31, 2013
Scenario, Forecast [Member] | Maximum [Member] | Tianjin Zerust [Member] |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments |  |  |  | $ 1,100,000 |  |  |
Equity Method Investments |  |  |  | $ 1,130,200 |  |  |
Tianjin Zerust [Member] |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments |  |  |  |  | $ 0 |  |
Other than Temporary Impairment Losses, Percentage of Investment |  |  |  |  | 60.00% |  |
Equity Method Investments |  | $ 2,243,524 |  |  | $ 1,883,668 | $ 2,243,524 |
Mutec [Member] |  |  |  |  |  |  |
Due from Joint Ventures |  | 156,854 |  |  | 125,891 | 156,854 |
SINGAPORE | NTI Asean LLC [Member] |  |  |  |  |  |  |
Payments to Acquire Interest in Joint Venture | $ 110,988 |  |  |  |  |  |
Payments to Acquire Interest in Joint Venture | $ 110,988 |  |  |  |  |  |
Equity Method Investment Ownership Acquired | 50.00% |  |  |  |  |  |
Mutec [Member] |  |  |  |  |  |  |
Financing Receivable, Net |  |  | $ 168,000 |  |  |  |
Notes Receivable Term |  |  | 4 years |  |  |  |
Payments to Acquire Interest in Joint Venture |  | 0 |  |  | 0 | 110,988 |
Payments to Acquire Interest in Joint Venture |  | $ 0 |  |  | $ 0 | $ 110,988 |

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- Definition For an unclassified balance sheet, amounts due from an entity in which the reporting entity shares joint control with another party or group. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.3) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 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 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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