Note 19 - Fair Value Measurements - Assets Measured at Fair Value on Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Securities available for sale	$ 447,335	$ 283,502
Equity securities (included in other assets)	1,900	1,600
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Securities available for sale	102,736	61,359
Agency Collateralized Mortgage Obligations [Member]
Securities available for sale	7,961	21,030
US Government Agencies Debt Securities [Member]
Securities available for sale	129,096	81,531
US Treasury and Government [Member]
Securities available for sale	49,794
Municipal Notes [Member]
Securities available for sale	157,748	119,582
Fair Value, Recurring [Member]
Securities available for sale	447,335	283,502
Equity securities (included in other assets)	1,881	1,553
Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Securities available for sale	102,736	61,359
Fair Value, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member]
Securities available for sale	7,961	21,030
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Securities available for sale	129,096	81,531
Fair Value, Recurring [Member] | US Treasury and Government [Member]
Securities available for sale	49,794
Fair Value, Recurring [Member] | Municipal Notes [Member]
Securities available for sale	157,748	119,582
Fair Value, Nonrecurring [Member]
Impaired loans	2,308	3,168
Loans held for sale	2,413	7,941
Foreclosed real estate	36
Fair Value, Nonrecurring [Member] | Residential Mortgage Segment [Member]
Impaired loans	1,034	1,728
Foreclosed real estate	36
Fair Value, Nonrecurring [Member] | Land Segment [Member]
Impaired loans	102	97
Fair Value, Nonrecurring [Member] | Commercial Real Estate Segment [Member]
Impaired loans	702	779
Fair Value, Nonrecurring [Member] | Commercial Business Segment [Member]
Impaired loans	174	211
Fair Value, Nonrecurring [Member] | Home Equity and Second Mortgage [Member]
Impaired loans	296	353
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Securities available for sale	0	0
Equity securities (included in other assets)	1,881	1,553
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Treasury and Government [Member]
Securities available for sale	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Municipal Notes [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member]
Impaired loans	0	0
Loans held for sale	0	0
Foreclosed real estate	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] | Residential Mortgage Segment [Member]
Impaired loans	0	0
Foreclosed real estate	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] | Land Segment [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Segment [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] | Commercial Business Segment [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] | Home Equity and Second Mortgage [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Securities available for sale	447,335	283,502
Equity securities (included in other assets)	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Securities available for sale	102,736	61,359
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member]
Securities available for sale	7,961	21,030
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Securities available for sale	129,096	81,531
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Treasury and Government [Member]
Securities available for sale	49,794
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Municipal Notes [Member]
Securities available for sale	157,748	119,582
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member]
Impaired loans	0	0
Loans held for sale	2,413	7,941
Foreclosed real estate	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] | Residential Mortgage Segment [Member]
Impaired loans	0	0
Foreclosed real estate	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] | Land Segment [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Segment [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] | Commercial Business Segment [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] | Home Equity and Second Mortgage [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Securities available for sale	0	0
Equity securities (included in other assets)	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Treasury and Government [Member]
Securities available for sale	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Municipal Notes [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Impaired loans	2,308	3,168
Loans held for sale	0	0
Foreclosed real estate	36
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Residential Mortgage Segment [Member]
Impaired loans	1,034	1,728
Foreclosed real estate	36
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Land Segment [Member]
Impaired loans	102	97
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Segment [Member]
Impaired loans	702	779
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Business Segment [Member]
Impaired loans	174	211
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Home Equity and Second Mortgage [Member]
Impaired loans	$ 296	$ 353