Note 5 - Fair Value Measurements - Estimated Fair Value of the Company's Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Reported Value Measurement [Member]
Financial assets:
Net loans	$ 980,663	$ 967,349
Loans held for sale		1,051
Financial liabilities:
Deposits	1,130,487	1,166,610
Other borrowings	12,107	12,901
Estimate of Fair Value Measurement [Member]
Financial assets:
Net loans	958,067	961,645
Loans held for sale		1,051
Financial liabilities:
Deposits	1,125,179	1,167,388
Other borrowings	12,107	12,901
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets:
Net loans	0	0
Loans held for sale		0
Financial liabilities:
Deposits	953,305	967,885
Other borrowings	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets:
Net loans	0	0
Loans held for sale		1,051
Financial liabilities:
Deposits	0	0
Other borrowings	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets:
Net loans	958,067	961,645
Loans held for sale		0
Financial liabilities:
Deposits	171,874	199,503
Other borrowings	$ 12,107	$ 12,901