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Note 10 - Summary of Option and Warrant Activity and Outstanding Shares (Details) - $ / shares | 1 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 30, 2015 | Mar. 31, 2016
Employee Stock Option [Member] |  |
Outstanding, Stock Options (in shares) |  | 875,977
Outstanding, Stock Options, Weighted Average Exercise Price (in dollars per share) |  | $ 0.98
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  | 129,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price |  | $ 1.14
Forfeited or expired, Stock Options (in shares) |  | (313,547)
Forfeited or expired, Stock Options, Weighted Average Exercise Price (in dollars per share) |  | $ 3.95
Outstanding, Stock Options (in shares) |  | 691,430
Outstanding, Stock Options, Weighted Average Exercise Price (in dollars per share) |  | $ 3.08
Stock Warrants [Member] |  |
Outstanding, Stock Warrants (in shares) |  | 703,281
Outstanding, Stock Warrants, Weighted Average Exercise Price (in dollars per share) |  | $ 4.38
Granted, Stock Warrants (in shares) |  | 30,000
Granted, Stock Warrants, Weighted Average Exercise Price (in dollars per share) |  | $ 4
Forfeited or expired, Stock Warrants (in shares) |  | (10,108)
Forfeited or expired, Stock Warrants, Weighted Average Exercise Price (in dollars per share) |  | $ 7.50
Outstanding, Stock Warrants (in shares) |  | 723,173
Outstanding, Stock Warrants, Weighted Average Exercise Price (in dollars per share) |  | $ 4.50
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ 0.83 |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: 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.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Number of shares under non-option equity instrument agreements that were either cancelled or expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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