Note 12 - Leases (Details Textual) - USD ($)	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Oct. 01, 2019	Sep. 30, 2019
Increase in Lease Liability with 10% Increase in Index	$ 19,000
Operating Lease, Liability, Total	7,649,938		$ 7,814,701
Operating Lease, Right-of-Use Asset	$ 5,685,985		5,823,972
Operating Lease, Weighted Average Remaining Lease Term	8 years 156 days
Operating Lease, Weighted Average Discount Rate, Percent	4.13%
Short-term Lease, Cost	$ 0
Selling, General and Administrative Expenses [Member]
Operating Lease, Expense	$ 224,031	$ 224,690
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability, Total			7,814,701
Operating Lease, Right-of-Use Asset			$ 5,823,972