Note 11 - Fair Value Measurements - Assets Measured at Fair Value on Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Securities available for sale, at fair value	$ 414,301	$ 437,271
Equity Securities, FV-NI, Current	1,200	1,300
Equity securities	1,200	1,300
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Securities available for sale, at fair value	65,613	72,044
Agency Collateralized Mortgage Obligations [Member]
Securities available for sale, at fair value	47,808	25,173
US Government Agencies Debt Securities [Member]
Securities available for sale, at fair value	127,522	129,505
US Treasury and Government [Member]
Securities available for sale, at fair value	44,791	63,084
Municipal Notes [Member]
Securities available for sale, at fair value	128,567	147,465
Fair Value, Recurring [Member]
Securities available for sale, at fair value	414,301	437,271
Equity Securities, FV-NI, Current	1,186	1,260
Equity securities	1,186	1,260
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value	44,791	63,084
Equity Securities, FV-NI, Current	1,186	1,260
Equity securities	1,186	1,260
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value	369,510	374,187
Equity Securities, FV-NI, Current	0	0
Equity securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value	0	0
Equity Securities, FV-NI, Current	0	0
Equity securities	0	0
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Securities available for sale, at fair value	65,613	72,044
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value	65,613	72,044
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member]
Securities available for sale, at fair value	47,808	25,173
Fair Value, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value	47,808	25,173
Fair Value, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Securities available for sale, at fair value	127,522	129,505
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value	127,522	129,505
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Recurring [Member] | US Treasury and Government [Member]
Securities available for sale, at fair value	44,791	63,084
Fair Value, Recurring [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value	44,791	63,084
Fair Value, Recurring [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Recurring [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Recurring [Member] | Municipal Notes [Member]
Securities available for sale, at fair value	128,567	147,465
Fair Value, Recurring [Member] | Municipal Notes [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Recurring [Member] | Municipal Notes [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value	128,567	147,465
Fair Value, Recurring [Member] | Municipal Notes [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value	0	0
Fair Value, Nonrecurring [Member]
Collateral dependent loans	1,215	54
Commercial Business	1,215	54
Fair Value, Nonrecurring [Member] | Residential Construction Segment [Member]
Collateral dependent loans	37	27
Commercial Business	37	27
Fair Value, Nonrecurring [Member] | Commercial Business [Member]
Collateral dependent loans	1,178
Commercial Business	1,178
Fair Value, Nonrecurring [Member] | Residential Mortgage Segment [Member]
Collateral dependent loans		27
Commercial Business		27
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans	0	0
Commercial Business	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential Construction Segment [Member]
Collateral dependent loans	0	0
Commercial Business	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Business [Member]
Collateral dependent loans	0
Commercial Business	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential Mortgage Segment [Member]
Collateral dependent loans		0
Commercial Business		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans	0	0
Commercial Business	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential Construction Segment [Member]
Collateral dependent loans	0	0
Commercial Business	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Business [Member]
Collateral dependent loans	0
Commercial Business	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Segment [Member]
Collateral dependent loans		0
Commercial Business		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans	1,215	54
Commercial Business	1,215	54
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Construction Segment [Member]
Collateral dependent loans	37	27
Commercial Business	37	27
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Business [Member]
Collateral dependent loans	1,178
Commercial Business	$ 1,178
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Segment [Member]
Collateral dependent loans		27
Commercial Business		$ 27