Note 5 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2019
Effective Income Tax Rate Reconciliation, Percent, Total	3.40%	0.00%
Deferred Tax Assets, Net, Total	$ 40,699,000
Deferred Tax Assets, Valuation Allowance, Total	34,883,000
Deferred Tax Assets, Operating Loss Carryforwards, Total	$ 5,816,000
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%