Note 8 - Stockholders' Equity - Warrants (Details) - USD ($) |
6 Months Ended | 12 Months Ended |
---|---|---|
Jun. 30, 2022 |
Dec. 31, 2021 |
|
Outstanding, number of shares (in shares) | 4,268,221 | |
Outstanding , weighted average exercise price (in dollars per share) | $ 2.18 | |
Outstanding, weighted average remaining life (Year) | 1 year | 1 year 6 months |
Outstanding, intrinsic value | $ 130,704 | $ 1,187,546 |
Issued, number of shares (in shares) | 0 | |
Issued, weighted average exercise price (in dollars per share) | $ 0 | |
Exercised, number of shares (in shares) | 0 | |
Exercised, weighted average exercise price (in dollars per share) | $ 0 | |
Outstanding , number of shares (in shares) | 4,268,221 | 4,268,221 |
Outstanding , weighted average exercise price (in dollars per share) | $ 2.18 | $ 2.18 |