Note 13 - Subsequent Events (Details Textual) - $ / shares					3 Months Ended
	Jun. 14, 2023	Apr. 13, 2023	Mar. 15, 2023	Jan. 12, 2023	Mar. 31, 2023	Mar. 31, 2022
Common Stock, Dividends, Per Share, Declared (in dollars per share)				$ 0.33
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)			$ 0.33		$ 0.33	$ 0.31
Forecast [Member]
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.33
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)		$ 0.33