Note 7 - Securities Available for Sale - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Due one year or less	$ 61,948
Due one year or less, fair value	56,824
Due after one year through five years, amortized cost	176,035
Due after one year through five years, fair value	162,511
Due after five years through fifteen years, amortized cost	55,252
Due after five years through fifteen years, fair value	50,016
Due after fifteen years, amortized cost	5
Due after fifteen years, fair value	5
Total, amortized cost	293,240	$ 287,966
Total, fair value	$ 269,356	$ 285,765