Note 12 - Income Taxes (Details Textual) - USD ($)		3 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2018
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 300,000
Unrecognized Tax Benefits, Ending Balance	400,000	$ 400,000
SEC Schedule, 12-09, Valuation Allowance, Operating Loss Carryforward [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		(500,000)
Tax Credit Carryforward, Valuation Allowance	47,319	47,319	$ 47,319
Valuation Allowance, Reserve for Uncertain Tax Position [Member]
Tax Credit Carryforward, Valuation Allowance	$ 400,000	$ 400,000	$ 400,000