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Note 12 - Stockholders' Equity (Details Textual) - USD ($) |  |  |  |  |  |  | 12 Months Ended | 54 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 03, 2021 | Aug. 17, 2021 | Apr. 09, 2021 | Mar. 24, 2021 | Feb. 26, 2021 | Jan. 06, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2013 | Dec. 31, 2021 | May 21, 2020
Common Stock, Shares Authorized (in shares) |  |  |  |  |  |  | 100,000,000 | 100,000,000 |  | 100,000,000 |
Common Stock, Par or Stated Value Per Share (in dollars per share) |  |  |  |  |  |  | $ 0.001 | $ 0.001 |  | $ 0.001 |
Common Stock, Shares, Issued, Total (in shares) |  |  |  |  |  |  | 21,285,706 | 21,655,461 |  | 21,285,706 |
Common Stock, Shares, Outstanding, Ending Balance (in shares) |  |  |  |  |  |  | 21,285,706 | 21,655,461 |  | 21,285,706 |
Preferred Stock, Shares Authorized (in shares) |  |  |  |  |  |  | 2,500,000 | 2,500,000 |  | 2,500,000 |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  |  |  |  |  |  | $ 0.001 | $ 0.001 |  | $ 0.001 |
Preferred Stock, Shares Issued, Total (in shares) |  |  |  |  |  |  | 0 | 0 |  | 0 |
Stock Issued During Period, Shares, Issued for Commitment Fee (in shares) |  |  | 80,000 | 80,000 |  |  |  |  |  |  |
Class of Warrant or Right, Issued by Exchange, Shares (in shares) |  | 500,000 |  |  |  |  | 500,000 |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  |  |  |  |  |  | 515,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 5.00
Prefunded Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  | $ 0.001 |  |  |  |  |  |  |  |  |
Stock Awards Other than Options [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  |  |  | $ 481,105 | $ 343,780 |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  |  |  | $ 481,105 | $ 343,780 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) |  |  |  |  |  |  | 149,636 | 128,299 |  | 149,636 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  |  |  |  | 71,582 |  |  | 52,941 |
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount |  |  |  |  |  |  | $ 529,259 |  |  | $ 529,259 |
Director [Member] |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Services (in shares) | 8,333 |  |  |  |  | 11,218 |  |  |  |  |
Stock Issued During Period, Value, Issued for Services | $ 57,500 |  |  |  |  | $ 70,000 |  |  |  |  |
Director [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  |  |  |  |  |  | 25,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  | 3 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Annual Grant |  |  |  |  |  |  |  |  | $ 35,000 |  |
Management [Member] |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Services (in shares) |  |  |  |  | 30,694 |  |  |  |  |  |
Stock Issued During Period, Value, Issued for Services |  |  |  |  | $ 166,667 |  |  |  |  |  |
Management [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  | 3 years |  |  |  |
Board of Directors Chairman [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Annual Grant |  |  |  |  |  |  |  |  | $ 70,000 |  |
Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Issued, Total (in shares) |  |  |  |  |  |  | 0 |  |  | 0 |

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