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Note 6 - Investments in Joint Ventures (Details) (NTI ASEAN [Member]) | Sep. 30, 2012 | Aug. 31, 2012
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NTI ASEAN [Member] |  |
Note 6 - Investments in Joint Ventures (Details) [Line Items] |  |
Equity Method Investment, Ownership Percentage |  | 50.00%
Business Acquisition, Percentage of Voting Interests Acquired | 10.00% |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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