Note 8 - Stock Warrants - Schedule of Exercisable Warrants (Details)	Sep. 30, 2022 $ / shares shares
Strike price (in dollars per share) \| $ / shares	$ 0.25
Outstanding warrants (in shares)	35,700,000
Weighted average remaining life, warrants (Year)	4 years 8 months 12 days
Number exercisable, warrants (in shares)	2,225,000
105 [Member]
Strike price (in dollars per share) \| $ / shares	$ 1.05
Outstanding warrants (in shares)	2,000,000
Weighted average remaining life, warrants (Year)	8 months 1 day
Number exercisable, warrants (in shares)	2,000,000
1.00 [Member]
Strike price (in dollars per share) \| $ / shares	$ 1.00
Outstanding warrants (in shares)	250,000
Weighted average remaining life, warrants (Year)	2 years
Number exercisable, warrants (in shares)	125,000
0.90 [Member]
Strike price (in dollars per share) \| $ / shares	$ 0.90
Outstanding warrants (in shares)	300,000
Weighted average remaining life, warrants (Year)	3 years
Number exercisable, warrants (in shares)	100,000
0.19 [Member]
Strike price (in dollars per share) \| $ / shares	$ 0.19
Outstanding warrants (in shares)	33,150,000
Weighted average remaining life, warrants (Year)	4 years 11 months 23 days
Number exercisable, warrants (in shares)	0