Note 10 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2016
Unrecognized Tax Benefits	$ 0		$ 0
Income Tax Expense (Benefit)	$ 593,000	$ 1,141,392	$ 1,393,000	$ 2,356,945
Effective Income Tax Rate Reconciliation, Percent	42.50%	32.60%	35.00%	30.60%
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Valuation Allowance	$ 322,000		$ 322,000		$ 322,000