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v3.20.2

Note 15 - Equity Transaction (Details Textual) - USD ($) |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Jan. 13, 2020 | Jan. 03, 2020 | Mar. 31, 2020 | Feb. 24, 2020
Series A Preferred Stock Warrants [Member] |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 1 |
Class of Warrant or Right, Outstanding (in shares) |  |  | 612,660 |
Warrants and Rights Outstanding |  |  | $ 753,000 |
Series A Preferred Stock Warrants [Member] | Measurement Input, Expected Term [Member] |  |  |  |
Warrants and Rights Outstanding, Term |  |  | 5 |
Series A Preferred Stock Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |  |
Warrants and Rights Outstanding, Term |  |  | 155 |
Series A Preferred Stock Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |
Warrants and Rights Outstanding, Term |  |  | 1.19 |
Series A Preferred Stock Warrants [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |  |
Warrants and Rights Outstanding, Term |  |  | 0 |
Conversion of Debt to Series A Preferred [Member] |  |  |  |
Debt Conversion, Original Debt, Amount |  |  | $ 478,000 |
Purchase Agreement [Member] | Series A Preferred Stock [Member] |  |  |  |
Sale of Stock, Shares Agreed to Purchase (in shares) |  | 500,000 |  |
Shares Issued, Price Per Share (in dollars per share) |  | $ 10 |  |
Sale of Stock, Offering Amount |  | $ 5,000,000 |  |
Preferred Stock, Dividend Rate, Percentage |  | 8.00% |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  | $ 10 |  |
Preferred Stock, Liquidation Preference Per Share (in dollars per share) |  | 10 |  |
Preferred Stock, Convertible, Conversion Price (in dollars per share) |  | $ 1 |  |
Preferred Stock, Number of Votes |  | 10 |  |
Percentage Holders of Preferred Stock Consent Required if Greater than 50,000 Shares Outstanding |  | 80.00% |  |
Shares Issued, Price Per Share (in dollars per share) |  | $ 10 |  |
First Closing of the Offering [Member] | Series A Preferred Stock [Member] |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 250,000 |  |  |
Proceeds from Issuance of Preferred Stock and Preference Stock | $ 2,500,000 |  |  |
Purchase Agreement Amendment [Member] | Series A Preferred Stock Warrants [Member] |  |  |  |
Sale of Stock, Offering Fee, Percent |  |  | 10.00% |
Class Of Warrant Or Right, Percentage Of Common Stock Issuable |  |  | 10.00% |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 1 |
Purchase Agreement Amendment [Member] | Common Stock [Member] |  |  |  |
Sale of Stock, Contingent Additional Offered Shares (in shares) |  |  |  | 140,000
Purchase Agreement Amendment [Member] | Series A Preferred Stock [Member] |  |  |  |
Sale of Stock, Shares Agreed to Purchase (in shares) |  |  |  | 70,000
Sale of Stock, Offering Amount |  |  |  | $ 700,000
Stock Issued During Period, Shares, New Issues (in shares) |  |  | 90,860 |
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  | $ 426,600 |
Shares Issued, Price Per Share (in dollars per share) |  |  |  | $ 10
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs |  |  | 1,679,000 |
Preferred Stock, Convertible, Beneficial Conversion Feature |  |  | $ 2,200,000 |

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