Note 11 - Leases - Supplemental Cash Flow Information (Details) - USD ($)	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Mar. 31, 2019
Operating cash flows from operating leases	$ 736,764
Operating cash flows from finance leases	24,962
Financing cash flows from finance leases	173,136	$ 173,136
Right-of-use assets obtained in exchange for operating leases	1,146,700
Right-of-use assets obtained in exchange for finance leases	$ 454,066