Note 5 - Stockholders Equity(Deficit) - Schedule of the Stock Options Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Outstanding, shares (in shares)	652,640	2,253,206
Outstanding, Weighted average exercise price (in dollars per share)	$ 0.91	$ 2.60
Outstanding, Weighted average remaining contractual life (Year)	5 years 3 months 29 days	6 years 4 months 17 days	8 years 2 months 8 days
Granted, shares (in shares)	0	0
Granted, Weighted average exercise price (in dollars per share)	$ 0	$ 0
Exercised, shares (in shares)	(148,872)	(85,939)
Exercised, Weighted average exercise price (in dollars per share)	$ 1.20	$ 1.28
Forfeited or expired, shares (in shares)	0	(1,514,627)
Forfeited or expired, Weighted average exercise price (in dollars per share)	$ 0	$ 3.38
Outstanding, shares (in shares)	503,768	652,640	2,253,206
Outstanding, Weighted average exercise price (in dollars per share)	$ 0.83	$ 0.91	$ 2.60
Outstanding, Aggregate Intrinsic value	$ 1,954,882
Vested and expected to vest, shares (in shares)	503,768
Vested and expected to vest, Weighted average exercise price (in dollars per share)	$ 0.83
Vested and expected to vest, Aggregate Intrinsic value	$ 1,954,882
Exercisable, shares (in shares)	503,768
Exercisable, Weighted average remaining contractual life (Year)	5 years 3 months 29 days
Exercisable, Aggregate Intrinsic value	$ 1,954,882
Share-based Payment Arrangement, Option [Member]
Exercisable, Weighted average exercise price (in dollars per share)	$ 0.83