Note 11 - Leases - Components of Lease Expense (Details) - USD ($)	3 Months Ended	6 Months Ended
Mar. 31, 2020	Mar. 31, 2020
Operating lease cost	$ 444,642	$ 736,764
Amortization of right-of-use assets	66,134	126,364
Interest on lease liabilities	12,793	24,962
Total finance lease cost	$ 78,927	$ 151,326

Amount of amortization expense attributable to right-of-use asset from finance lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
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-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 55
-Paragraph 53
-URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971

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