Note 8 - Borrowings - Advances from FHLB (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Balance outstanding	$ 5,500
Maximum outstanding at any month-end	10,000
Average monthly outstanding during the period	$ 6,856
Annual	9.60%
Period End	8.50%
Subordinated Debt [Member]
Balance outstanding	$ 39,494	$ 39,436
Maximum outstanding at any month-end	39,494	39,436
Average monthly outstanding during the period	$ 39,465	$ 39,395
Annual	4.01%	4.01%
Period End	4.00%	4.00%
Line of Credit [Member]
Balance outstanding		$ 6,500
Maximum outstanding at any month-end		11,000
Average monthly outstanding during the period		$ 9,327
Annual		9.15%
Period End		9.00%
Federal Home Loan Bank, Long-term Advances [Member]
Balance outstanding	$ 160,000	$ 80,000
Maximum outstanding at any month-end	170,000	85,000
Average monthly outstanding during the period	$ 128,333	$ 81,667
Annual	3.24%	2.00%
Period End	3.63%	2.09%
Within one year or less	$ 20,000
Within one year or less, weighted-average interest rate	2.12%
After one year through two years	$ 55,000
After one year through two years, weighted-average interest rate	3.85%
After two years through three years	$ 50,000
After two years through three years, weighted-average interest rate	3.93%
After three years through four years	$ 35,000
After three years through four years, weighted-average interest rate	3.72%
Total FHLB long-term advances	$ 160,000
Total FHLB long-term advances, weighted-average interest rate	3.63%
Federal Home Loan Bank, Overnight Variable-rate Advances [Member]
Balance outstanding	$ 130,000	$ 195,000
Maximum outstanding at any month-end	270,000	195,000
Average monthly outstanding during the period	$ 154,778	$ 149,500
Annual	5.51%	5.26%
Period End	5.35%	5.52%
Federal Home Loan Bank, Short-term, Fixed-rate Advances [Member]
Balance outstanding	$ 0	$ 0
Maximum outstanding at any month-end	100	95,000
Average monthly outstanding during the period	$ 11	$ 25,000
Annual	5.27%	5.08%
Period End	0.00%	5.27%