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Note 2 - Debt (Tables) | 12 Months Ended
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Dec. 31, 2017
Note 2 - Debt Tables |
Schedule of convertible debentures |
Note Agreement |  | Balance at December 31, 2017 |  | Balance at December 31, 2016
2009 Debentures |  | $ | — |  |  | $ | 305,000 |
June 2011 Debentures |  |  | — |  |  |  | 64,000 |
November 2011 Debentures |  |  | — |  |  |  | 125,000 |
March 2012 Debentures |  |  | — |  |  |  | 140,000 |
May 2012 Debentures |  |  | — |  |  |  | 225,000 |
December 2012 Debentures |  |  | — |  |  |  | 425,000 |
November 2013 Debentures |  |  | — |  |  |  | 172,000 |
July 2014 Debentures |  |  | — |  |  |  | 3,140,000 |
October 2014 Debentures |  |  | — |  |  |  | 1,250,000 |
March 2015 Debentures |  |  | — |  |  |  | 2,175,000 |
July 2015 Debentures |  |  | — |  |  |  | 500,000 |
October 2015 Debentures |  |  | — |  |  |  | 330,000 |
November 2015 Debentures |  |  | — |  |  |  | 190,000 |
December 2015 Debentures |  |  | — |  |  |  | 200,000 |
January 2016 Debentures |  |  | — |  |  |  | 150,000 |
May 2016 Debentures |  |  | — |  |  |  | 1,503,000 |
September 2016 Debentures |  |  | — |  |  |  | 250,000 |
January 2017 Debentures |  |  | — |  |  |  | — |
March 2017 Debentures |  |  | — |  |  |  | — |
April 2017 Debentures |  |  | — |  |  |  | — |
July 2017 Debentures |  |  | — |  |  |  | — |
August 2017 Debentures |  |  | — |  |  |  |  |
Total convertible debentures |  | $ | — |  |  | $ | 11,144,000 |
Less: discount |  |  | — |  |  |  | (794,000 | )
Total convertible debentures, net of discount |  | $ | — |  |  | $ | 10,350,000 |
Total short term convertible debentures, net of discount |  | $ | — |  |  | $ | 10,350,000 |

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