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Note 14 - Related Party Transactions (Details Textual) - USD ($) |  |  |  | 1 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 31, 2021 | Feb. 28, 2021 | Mar. 13, 2019 | Dec. 01, 2018 | Nov. 30, 2018 | Dec. 31, 2023 | Dec. 31, 2021 | May 14, 2021 | Feb. 04, 2021 | Oct. 31, 2013
Warrants and Rights Outstanding, Term (Year) |  |  |  |  |  | 5 years |  |  |  |
Placement Agent Warrants [Member] |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  | 179,536 |  | 179,536 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  | $ 4 | $ 2.85 |  |
Warrants and Rights Outstanding, Term (Year) |  |  |  |  |  |  |  | 5 years |  |
Series D Preferred Stock Warrants [Member] |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  |  |  | 592,106 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  | $ 2.51 |  |
Warrants and Rights Outstanding, Term (Year) |  |  |  |  |  |  |  | 5 years 6 months |  |
Taglich Brothers Inc. [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction, Monthly Fees for Services, First Three Months |  |  |  |  | $ 8,000 |  |  |  |  |
Related Party Transaction, Monthly Fees for Services, After Three Months |  |  |  |  | 5,000 |  |  |  |  |
Related Party Transaction, Success Fee, Revenue Target Under 5 Million |  |  |  | $ 200,000 | 200,000 |  |  |  |  |
Related Party Transaction, Success Fee, Revenue Target Over 200 Million |  |  |  |  | $ 1,000,000 |  |  |  |  |
Taglich Brothers Inc. [Member] | Placement Agent Warrants [Member] |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  | 4,246 |  |  |  | 10,926
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  | $ 321 |  |  |  | $ 761.61
Taglich Brothers Inc. [Member] | Investor Shareholder Warrants [Member] |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  |  |  |  | 29,084 |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  |  | $ 3.875 |
Warrants and Rights Outstanding, Term (Year) |  |  |  |  |  |  |  |  | 5 years |
Warrants, Period Prior to Exercise (Month) |  | 6 months |  |  |  |  |  |  |  |
Taglich Brothers Inc. [Member] | Series D Preferred Stock Warrants [Member] |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 53,861 |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 2.85 |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) | 5 years |  |  |  |  |  |  |  |  |
Warrants, Period Prior to Exercise (Month) | 6 months |  |  |  |  |  |  |  |  |
Michael Taglich [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Units, New Issues (in shares) |  |  | 350 |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity, Total |  |  | $ 350,000 |  |  |  |  |  |  |
Michael Taglich [Member] | Placement Agent Warrants [Member] |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  | 1,080 |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  | $ 1,000 |  |  |  |

X
- Definition Amount of monthly fees paid to related party after the first three months + References No definition available. + Details
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