Note 12 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Expense (Benefit), Total	$ 118,310	$ (73,749)	$ 675,457	$ 2,793,590
Effective Income Tax Rate Reconciliation, Percent, Total			20.03%
Income Tax Expense (Benefit), Excluding Adjustment of Deferred Tax (Asset) Liability	319,590
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	2,474,000
Unrecognized Tax Benefits, Ending Balance	$ 0		$ 0