Note 16 - Subsequent Events (Details Textual) - USD ($)		1 Months Ended
	Aug. 05, 2022	Jul. 31, 2022	Sep. 30, 2020
Stock Repurchase Program, Authorized Amount			$ 250,000,000
Stock Repurchase Program, Period in Force (Month)			24 months
Subsequent Event [Member]
Treasury Stock, Shares, Acquired (in shares)		536,633
Treasury Stock, Value, Acquired, Cost Method		$ 123,900
Stock Repurchase Program, Authorized Amount	$ 500,000
Stock Repurchase Program, Period in Force (Month)	24 months