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Note 5 - Intangible Assets (Tables) | 9 Months Ended
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Jun. 30, 2013
Note 5 - Intangible Assets (Tables) [Line Items] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | June 30, 2013 |  |  | September 30, 2012 |
Cost |  | $ | 350,582 |  |  | $ | 358,925 |
Accumulated amortization |  |  | (211,999 | ) |  |  | (200,468 | )
|  | $ | 138,583 |  |  | $ | 158,457 |
Amortization expense and impairment of patents [Member] |
Note 5 - Intangible Assets (Tables) [Line Items] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | Nine months ended June 30, |
|  | 2013 |  |  | 2012 |
Amortization expense |  | $ | 17,470 |  |  | $ | 22,382 |
Loss on sale or impairment of patents |  |  | - |  |  |  | 18,205 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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