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Note 14 - Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2019
Notes Tables |
Schedule of Preferred Stock and Accrued Dividends [Table Text Block] |
|  | Series A-1 |  |  | Accrued Dividends |
Balance – January 1, 2017 |  |  | 90,000 |  |  | $ | 270,000 |
Accrual of dividends – Q1 2017 |  |  | - |  |  |  | 135,000 |
Accrual of dividends – Q2 2017 |  |  | - |  |  |  | 135,000 |
Accrual of dividends – Q3 2017 |  |  | - |  |  |  | 135,000 |
Conversion into common stock – September 2017 |  |  | - |  |  |  | (540,000 | )
Conversion into common stock – October 2017 |  |  | (27,404 | ) |  |  | - |
Accrual of dividends – Q4 2017 |  |  | - |  |  |  | 101,658 |
Balance – December 31, 2017 |  |  | 62,596 |  |  | $ | 236,658 |
Accrual of dividends – Q1 2018 |  |  | - |  |  |  | 93,894 |
Conversion into common stock – April 2018 |  |  | (39,088 | ) |  |  | (330,552 | )
Accrual of dividends – Q2 2018 (until final conversion) |  |  | - |  |  |  | 25,463 |
Conversion into common stock – May 2018 |  |  | (23,508 | ) |  |  | (25,463 | )
Balance – December 31, 2018 |  |  | - |  |  | $ | - |
|  | Series B-1 |  |  | Accrued Dividends |
Balance – January 1, 2017 |  |  | 105,000 |  |  | $ | 131,250 |
Accrual of dividends – Q1 2017 |  |  | - |  |  |  | 65,625 |
Accrual of dividends – Q2 2017 |  |  | - |  |  |  | 65,625 |
Accrual of dividends – Q3 2017 |  |  | - |  |  |  | 65,625 |
Accrual of dividends – Q4 2017 |  |  | - |  |  |  | 65,625 |
Balance – December 31, 2017 |  |  | 105,000 |  |  |  | 393,750 |
Conversion into common stock – March 2018 |  |  | (60,420 | ) |  |  | (417,084 | )
Accrual of dividends – Q1 2018 |  |  | - |  |  |  | 62,268 |
Accrual of dividends – Q2 2018 (until final conversion) |  |  | - |  |  |  | 16,408 |
Conversion into common stock – May 2018 |  |  | (44,580 | ) |  |  | (55,342 | )
Balance – December 31, 2018 |  |  | - |  |  | $ | - |

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