Note 13 - Fair Value Measurements - Estimated Fair Values of the Company's Financial Information (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Available-for-sale debt securities	$ 473,119	$ 476,091
Equity securities, at fair value	7,369	7,717
Reported Value Measurement [Member]
Available-for-sale debt securities	473,119	476,091
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	69,571	41,916
Equity securities, at fair value	7,369	7,717
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Restricted stock	8,482	8,545
Loans held for sale	0	60
Loans and leases, net	1,151,510	1,110,124
Accrued interest receivable	6,143	5,957
Derivative assets	1,526	1,946
Deposits	1,463,306	1,420,647
Borrowed funds	196,648	182,360
Accrued interest payable	848	171
Derivative liabilities	2,217	921
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Servicing rights	231	254
Estimate of Fair Value Measurement [Member]
Available-for-sale debt securities	473,119	476,091
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	69,571	41,916
Equity securities, at fair value	7,369	7,717
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Restricted stock	8,482	8,545
Loans held for sale	0	60
Loans and leases, net	1,113,514	1,079,266
Accrued interest receivable	6,143	5,957
Derivative assets	1,712	2,104
Deposits	1,459,050	1,416,272
Borrowed funds	196,853	182,108
Accrued interest payable	848	171
Derivative liabilities	2,203	931
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Servicing rights	$ 601	$ 621