Note 1 - Basis of Presentation and Significant Accounting Policies - Property and Equipment Useful Lives (Details)	12 Months Ended
	Sep. 30, 2021
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	5 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	15 years
Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	1 year 6 months
Computer Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	5 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	15 years