Note 4 - Goodwill and Other Intangible Assets (Details Textual)	9 Months Ended	18 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Goodwill, Acquired During Period	$ 3,551,000	$ 3,551,000
Finite-lived Intangible Assets Acquired	$ 3,650,000
Finite-Lived Intangible Assets, Remaining Amortization Period	10 years
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months	$ 16,060,000	16,060,000
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two	15,634,000	15,634,000
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Three	12,744,000	12,744,000
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four	12,263,000	12,263,000
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Five	$ 11,237,000	$ 11,237,000