Note 12 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2020
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ (339,000)
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total		$ 11,900,000
Domestic Tax Authority [Member] | Gilman [Member]
Operating Loss Carryforwards, Total		4,600,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total		$ 7,300,000