Note 13 - Subordinated Debentures (Details Textual) - Subordinated Debt [Member] - USD ($) $ in Millions	1 Months Ended
	Nov. 30, 2019	Dec. 31, 2022
Ten Year Notes Due 2029 [Member]
Debt Instrument, Face Amount	$ 17.5
Debt Instrument, Interest Rate, Stated Percentage	5.25%
Debt Instrument, Repurchase Amount		$ 1.0
Long-Term Debt, Gross		16.5
Ten Year Notes Due 2029 [Member] | Three Month London Interbank Offered Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	3.69%
Fifteen Year Notes Due 2034 [Member]
Debt Instrument, Face Amount	$ 12.5
Debt Instrument, Interest Rate, Stated Percentage	5.25%
Debt Instrument, Repurchase Amount		2.5
Long-Term Debt, Gross		$ 10.0
Fifteen Year Notes Due 2034 [Member] | Three Month London Interbank Offered Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	3.57%