Note 14 - Commitments and Contingencies (Details Textual) - USD ($)	3 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Bonuses and Related Payroll Tax Expense [Member]
Increase (Decrease) in Other Employee-Related Liabilities	$ 408,155	$ 392,930

Amount of increase (decrease) in employer-related costs classified as other and current.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Name:	us-gaap_IncreaseDecreaseInOtherEmployeeRelatedLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration