Note 12 - Regulatory Matters (Details Textual) - $ / shares		3 Months Ended
	Apr. 26, 2023	Mar. 31, 2023	Mar. 31, 2022	Jan. 25, 2023
Common Stock, Dividends, Per Share, Declared (in dollars per share)		$ 0.090	$ 0.075
Stock Issued During Period, Shares, Dividend Reinvestment Plan (in shares)		2,229	1,310
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)				750,000
Stock Repurchased and Retired During Period, Shares (in shares)		0
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.090
Dividends Payable, Date to be Paid	Jun. 15, 2023
Dividends Payable, Date of Record	Jun. 01, 2023