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Note 11 - Leases (Details Textual) - USD ($)
6 Months Ended
Mar. 31, 2020
Oct. 01, 2019
Sep. 30, 2019
Operating Lease, Right-of-Use Asset $ 5,178,084  
Operating Lease, Liability, Total 5,394,075    
Finance Lease, Right-of-Use Asset 1,198,985    
Finance Lease, Liability, Total $ 1,025,848    
Minimum [Member]      
Lessee, Operating and Finance Lease, Remaining Lease Term (Year) 1 year    
Maximum [Member]      
Lessee, Operating and Finance Lease, Remaining Lease Term (Year) 10 years    
Accounting Standards Update 2016-02 [Member]      
Operating Lease, Right-of-Use Asset   $ 4,700,000  
Operating Lease, Liability, Total   4,700,000  
Finance Lease, Right-of-Use Asset   600,000  
Finance Lease, Liability, Total   $ 600,000