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Note 7 - Stockholders' Equity- Stock Option Activity (Details)
 12 Months Ended
Dec. 31, 2021
USD ($)
$ / shares
shares
Outstanding (in shares) 602,000
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 2.79
Granted (in shares) 360,300
Granted, weighted average exercise price (in dollars per share) | $ / shares $ 3.82
Exercised (in shares) 0
Exercised, weighted average exercise price (in dollars per share) | $ / shares $ 0
Forfeited or expired (in shares) 0
Outstanding (in shares) 962,300
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 3.18
Outstanding, weighted average remaining contractual term (Year) 9 years 3 months 21 days
Outstanding, aggregate intrinsic value | $ $ 499,660
Exercisable (in shares) 200,661
Exercisable, weighted average exercise price (in dollars per share) | $ / shares $ 2.79
Exercisable, weighted average remaining contractual term (Year) 8 years 11 months 4 days
Exercisable, aggregate intrinsic value | $ $ 166,549