Note 23 - Condensed Financial Statements of Parent Company - Parent Company Balance Sheets (Details) (Parentheticals) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
Preferred stock, par or stated value per share (in dollars per share)	$ 1	$ 1
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)	$ 2.5	$ 2.5
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	14,683,457	12,783,646
Common stock, shares outstanding (in shares)	14,683,457	12,783,646
Parent Company [Member]
Preferred stock, par or stated value per share (in dollars per share)	$ 1	$ 1
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)	$ 2.5	$ 2.5
Common stock, shares authorized (in shares)	20,000,000
Common stock, shares issued (in shares)	14,683,457	12,783,646
Common stock, shares outstanding (in shares)	14,683,457	12,783,646