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Consolidated Statements of Cash Flows (Parentheticals) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Shares issued (in shares) |  | 716,790
Common stock issued for cancellation of accrued compensation (in shares) |  | 300,001
Deferred compensation |  | $ 1,500,000
Paycheck Protection Program CARES Act [Member] |  |
Extinguishment of debt | $ 172,056 |
Conversion from Convertible Debentures to Conversion Units [Member] |  |
Shares issued upon conversion (in shares) |  | 177,626
Convertible debentures |  | $ 1,200,000
Related accrued interest |  | $ 14,667
Stock Purchase Warrants First Issuance [Member] |  |
Common stock issued (in shares) | 149,705 | 36,902
Unit Warrants [Member] |  |
Warrant issued (in shares) |  | 300,001
Unit Warrants [Member] | Conversion from Convertible Debentures to Conversion Units [Member] |  |
Pre-funded stock purchase warrants (in shares) |  | 303,668
Pre-Funded Warrants [Member] | Conversion from Convertible Debentures to Conversion Units [Member] |  |
Pre-funded stock purchase warrants (in shares) |  | 126,042

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