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Note 5 - Intangible Assets | 9 Months Ended
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Jun. 30, 2013
Disclosure Text Block [Abstract] |
Intangible Assets Disclosure [Text Block] | 5. INTANGIBLE ASSETS Patents consisted of the following:
|  | June 30, 2013 |  |  | September 30, 2012 |
Cost |  | $ | 350,582 |  |  | $ | 358,925 |
Accumulated amortization |  |  | (211,999 | ) |  |  | (200,468 | )
|  | $ | 138,583 |  |  | $ | 158,457 |
|  | Nine months ended June 30, |
|  | 2013 |  |  | 2012 |
Amortization expense |  | $ | 17,470 |  |  | $ | 22,382 |
Loss on sale or impairment of patents |  |  | - |  |  |  | 18,205 |
Each quarter, the Company reviews the ongoing value of its capitalized patent costs and reduces the value if any of its patents are no longer consistent with its business strategy, as noted in the above table.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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