Note 13 - Commitments and Contingencies	12 Months Ended
Sep. 30, 2015
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	13. COMMITMENTS AND CONTINGENCIES Legal Matters: The Company is the plaintiff in a suit pursuing patent infringement against a competitor in the emissions market. Management believes that it is not currently possible to estimate the impact, if any, that the ultimate resolution of this matter will have on the Company's results of operations, financial position or cash flows.

The entire disclosure for commitments and contingencies.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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