v3.21.2

Note 5 - Stockholders' Equity (Deficit) (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Jun. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2018 | Dec. 31, 2016 | Dec. 31, 2020
Common Stock, Shares Authorized (in shares) | 50,000,000 |  |  | 50,000,000 |  |  |  | 50,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.00001 |  |  | $ 0.00001 |  |  |  | $ 0.00001
Share-based Payment Arrangement, Expense | $ 1,028,399 |  | $ 144,100 | $ 6,989,942 | $ 2,610,412 |  |  |
Stock Issued During Period, Shares, Issued for Services (in shares) |  |  |  | 12,278 |  |  |  |
Stock Issued During Period, Value, Issued for Services |  |  |  | $ 249,980 | $ 145,200 |  |  |
Class of Warrant or Right, Exercised During Period (in shares) |  |  |  | 309,252 |  |  |  |
Stock Issued During Period, Shares, Cashless Warrant Exercised (in shares) |  |  |  | 121,111 |  |  |  |
Share-based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  | 0 | 0 |  |  |
Share-based Payment Arrangement, Expense | 632 |  | 24,277 | $ 11,402 | $ 302,510 |  |  |
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | 0 |  |  | 0 |  |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expense | 1,027,767 |  | $ 99,303 | $ 6,728,560 | $ 384,200 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  | 1,037,334 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  |  | 4 years |  |  |  |
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount | $ 7,816,855 |  |  | $ 7,816,855 |  |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  | 2 years 8 months 12 days |  |  |  |
Restricted Stock Units (RSUs) [Member] | Employee [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  | 466,266 |  |  |  |
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  | 365,000 |  |  |  |
Restricted Stock Units (RSUs) [Member] | Board Members [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  | 206,068 |  |  |  |
Restricted Stock Units (RSUs) [Member] | Board Members [Member] | Share-based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  |  | 50.00% |  |  |  |
Restricted Stock Units (RSUs) [Member] | Board Members [Member] | Share-based Payment Arrangement, Tranche Two [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  |  | 50.00% |  |  |  |
The 2016 Incentive Plan [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award Plan, Expiration Period (Year) |  |  |  |  |  |  | 10 years |
The 2021 Incentive Plan [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award Plan, Expiration Period (Year) |  | 10 years |  |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  | 3,000,000 |  |  |  |  |  |
The 2018 Incentive Plan [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award Plan, Expiration Period (Year) |  |  |  |  |  | 10 years |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  |  |  |  | 3,000,000 |  |

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