Note 9 - Equity - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Shares Outstanding (in shares)	1,050,000	150,000
Outstanding, weighted average exercise price (in dollars per share)	$ 1.64	$ 2.21
Outstanding, weighted average contractual term (Year)	4 years 73 days	4 years 146 days	2 years 328 days
Shares Granted (in shares)	1,000,000	900,000
Granted, weighted average exercise price (in dollars per share)	$ 2.25	$ 1.50
Granted, weighted average contractual term (Year)	5 years	4 years 292 days
Shares Forfeited (in shares)	(200,000)
Forfeited, weighted average exercise price (in dollars per share)	$ 1.50
Shares Outstanding (in shares)	1,850,000	1,050,000	150,000
Outstanding, weighted average exercise price (in dollars per share)	$ 1.99	$ 1.64	$ 2.21
Shares Vested and expected to vest (in shares)	1,850,000
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 1.99
Vested and expected to vest, weighted average contractual term (Year)	4 years 73 days
Shares Exercisable (in shares)	1,850,000
Exercisable, weighted average exercise price (in dollars per share)	$ 1.99
Exercisable, weighted average contractual term (Year)	4 years 73 days