Note 23 - Condensed Financial Statements of Parent Company - Parent Company Balance Sheets (Details) (Parentheticals) - $ / shares	Dec. 31, 2022	Dec. 31, 2021	Apr. 30, 2021
Preferred stock, par or stated value per share (in dollars per share)	$ 1.00	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	250,000	250,000
Preferred stock, shares issued (in shares)	1,500	1,500	1,500
Common Stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	12,783,646	12,763,827
Common stock, shares outstanding (in shares)	12,783,646	12,743,125
Employee Stock Ownership Plan (ESOP). number of suspense shares (in shares)	0	20,702
Parent Company [Member]
Preferred stock, par or stated value per share (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	250,000	250,000
Preferred stock, shares issued (in shares)	1,500	1,500
Common Stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	12,783,646	12,763,827
Common stock, shares outstanding (in shares)	12,783,646	12,743,125
Employee Stock Ownership Plan (ESOP). number of suspense shares (in shares)		20,702