Note 8 - Fair Value Measurements - Carrying Amount and Estimated Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Total available-for-sale debt securities, fair value	$ 391,414	$ 420,862
Loans held-for-sale	160	1,660
Reported Value Measurement [Member]
Cash and cash equivalents	63,038	29,091
Held-to-maturity securities	223,112	222,744
Total available-for-sale debt securities, fair value	391,414	420,862
Restricted investments in bank stock	5,968	5,268
Loans and leases, net	1,609,089	1,547,025
Loans held-for-sale	156	1,637
Accrued interest receivable	8,666	8,487
Interest rate swaps	154	213
Short-term borrowings	88,989	12,940
Secured borrowings	7,560	7,619
Accrued interest payable	686	448
Interest rate swaps	154	213
Reported Value Measurement [Member] | Deposits with No Stated Maturities [Member]
Deposits	1,986,745	2,049,689
Reported Value Measurement [Member] | Time Deposits [Member]
Deposits	156,346	117,224
Estimate of Fair Value Measurement [Member]
Cash and cash equivalents	63,038	29,091
Held-to-maturity securities	194,251	187,280
Total available-for-sale debt securities, fair value	391,414	420,862
Restricted investments in bank stock	5,968	5,268
Loans and leases, net	1,482,605	1,440,151
Loans held-for-sale	160	1,660
Accrued interest receivable	8,666	8,487
Interest rate swaps	154	213
Short-term borrowings	88,984	12,940
Secured borrowings	7,655	7,275
Accrued interest payable	686	448
Interest rate swaps	154	213
Estimate of Fair Value Measurement [Member] | Deposits with No Stated Maturities [Member]
Deposits	1,986,745	2,049,689
Estimate of Fair Value Measurement [Member] | Time Deposits [Member]
Deposits	152,976	113,252
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	63,038	29,091
Held-to-maturity securities	0	0
Total available-for-sale debt securities, fair value	0	0
Restricted investments in bank stock	0	0
Loans and leases, net	0	0
Loans held-for-sale	0	0
Accrued interest receivable	0	0
Interest rate swaps	0	0
Short-term borrowings	0	0
Secured borrowings	0	0
Accrued interest payable	0	0
Interest rate swaps	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Deposits with No Stated Maturities [Member]
Deposits	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Time Deposits [Member]
Deposits	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents	0	0
Held-to-maturity securities	194,251	187,280
Total available-for-sale debt securities, fair value	391,414	420,862
Restricted investments in bank stock	5,968	5,268
Loans and leases, net	0	0
Loans held-for-sale	160	1,660
Accrued interest receivable	8,666	8,487
Interest rate swaps	154	213
Short-term borrowings	88,984	12,940
Secured borrowings	0	0
Accrued interest payable	686	448
Interest rate swaps	154	213
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Deposits with No Stated Maturities [Member]
Deposits	1,986,745	2,049,689
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Time Deposits [Member]
Deposits	152,976	113,252
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents	0	0
Held-to-maturity securities	0	0
Total available-for-sale debt securities, fair value	0	0
Restricted investments in bank stock	0	0
Loans and leases, net	1,482,605	1,440,151
Loans held-for-sale	0	0
Accrued interest receivable	0	0
Interest rate swaps	0	0
Short-term borrowings	0	0
Secured borrowings	7,655	7,275
Accrued interest payable	0	0
Interest rate swaps	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Deposits with No Stated Maturities [Member]
Deposits	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Time Deposits [Member]
Deposits	$ 0	$ 0