Note 4 - Loans - Credit Risk Profile (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Total loans		$ 2,186,449		$ 1,946,580
Commercial Portfolio Segment [Member]
Total loans	[1]	304,247		299,773
Commercial Portfolio Segment [Member] | Pass [Member]
Total loans		288,041		290,823
Commercial Portfolio Segment [Member] | Special Mention [Member]
Total loans		10,657		8,333
Commercial Portfolio Segment [Member] | Substandard [Member]
Total loans		5,548		617
Commercial Portfolio Segment [Member] | Doubtful [Member]
Total loans		1		0
Commercial Real Estate Portfolio Segment [Member] | Construction and Land Development [Member]
Total loans		197,525		134,221
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Total loans		418,462		391,517
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Total loans		827,728		731,034
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction and Land Development [Member]
Total loans		197,331		130,111
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Commercial Real Estate [Member]
Total loans		405,223		372,177
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction and Land Development [Member]
Total loans		0		2,881
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Owner Occupied Commercial Real Estate [Member]
Total loans		2,388		11,048
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction and Land Development [Member]
Total loans		194		1,229
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Commercial Real Estate [Member]
Total loans		10,851		8,292
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Construction and Land Development [Member]
Total loans		0		0
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Owner Occupied Commercial Real Estate [Member]
Total loans		0		0
Residential Portfolio Segment [Member]
Total loans		431,872		382,960
Residential Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Total loans		827,728		731,034
Residential Portfolio Segment [Member] | Residential [Member]
Total loans		338,132		289,757
Residential Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Total loans			$ 93,740	93,203
Residential Portfolio Segment [Member] | Pass [Member] | Non-owner Occupied Commercial Real Estate [Member]
Total loans		826,844		720,138
Residential Portfolio Segment [Member] | Pass [Member] | Residential [Member]
Total loans		333,124		285,188
Residential Portfolio Segment [Member] | Pass [Member] | Home Equity Line of Credit [Member]
Total loans			93,062	92,807
Residential Portfolio Segment [Member] | Special Mention [Member] | Non-owner Occupied Commercial Real Estate [Member]
Total loans		239		8,702
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential [Member]
Total loans		1,577		1,774
Residential Portfolio Segment [Member] | Special Mention [Member] | Home Equity Line of Credit [Member]
Total loans			0	0
Residential Portfolio Segment [Member] | Substandard [Member] | Non-owner Occupied Commercial Real Estate [Member]
Total loans		645		2,194
Residential Portfolio Segment [Member] | Substandard [Member] | Residential [Member]
Total loans		3,431		2,795
Residential Portfolio Segment [Member] | Substandard [Member] | Home Equity Line of Credit [Member]
Total loans			678	396
Residential Portfolio Segment [Member] | Doubtful [Member] | Non-owner Occupied Commercial Real Estate [Member]
Total loans		0		0
Residential Portfolio Segment [Member] | Doubtful [Member] | Residential [Member]
Total loans		0		0
Residential Portfolio Segment [Member] | Doubtful [Member] | Home Equity Line of Credit [Member]
Total loans			$ 0	0
Consumer Portfolio Segment [Member]
Total loans		6,615		7,075
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Total loans		6,599		7,057
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Total loans		$ 16		$ 18

[1] Includes PPP loans, which are guaranteed by the SBA and have no related allowance.