Note 8 - Shareholders' Equity - Stock Option Activity (Details) - $ / shares	3 Months Ended	12 Months Ended
Dec. 31, 2019	Sep. 30, 2019
Shares Exercisable (in shares)	800,000	800,000
Exercisable, weighted average exercise price (in dollars per share)	$ 1.69	$ 1.69
Exercisable, weighted average contractual term (Year)	4 years	4 years
Shares Outstanding (in shares)	1,050,000
Outstanding, weighted average exercise price (in dollars per share)	$ 1.64
Outstanding, weighted average contractual term (Year)	4 years 73 days
Shares Vested and expected to vest (in shares)	1,050,000
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 1.64
Vested and expected to vest, weighted average contractual term (Year)	4 years 73 days

Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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