Note 4 - Loans Receivable - Summary of Loans Receivable (Details) - USD ($) $ in Thousands		Jun. 30, 2023		Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022		Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Loans receivable		$ 1,421,483				$ 1,355,423
Deferred loan fees, net(1)	[1]	0				(1,745)
Allowance for credit losses (2)		(15,560)	[2]		$ (14,000)	(14,000)	[2]
Total loans, net	[3]	1,405,923				1,339,678
Residential Portfolio Segment [Member]
Loans receivable		182,953				195,703		$ 186,229
Allowance for credit losses (2)		(1,786)		$ (1,580)	(1,472)	(1,472)		(1,643)	$ (1,616)	$ (1,596)
Commercial Real Estate Portfolio Segment [Member]
Loans receivable		875,545				826,549		743,326
Allowance for credit losses (2)		(10,011)		(9,732)	(9,037)	(9,037)		(8,337)	(7,659)	(7,470)
Home Equity Portfolio Segment [Member]
Loans receivable		80,333				74,271		62,445
Allowance for credit losses (2)		(526)		(513)	(509)	(509)		(507)	(536)	(533)
Consumer Portfolio Segment [Member]
Loans receivable		30,065				27,609		25,775
Allowance for credit losses (2)		(318)		(344)	(342)	(342)		(361)	(357)	(365)
Commercial Portfolio Segment [Member]
Loans receivable		252,587				231,291		234,741
Allowance for credit losses (2)		$ (2,919)		$ (2,831)	$ (2,640)	$ (2,640)		$ (2,477)	$ (2,532)	$ (2,536)

[1] Deferred loan fees, net included in individual loan buckets above for the quarter ended June 30, 2023.

[2] Allowance for credit losses for the quarter ended June 30, 2023; allowance for loan losses for prior periods.

[3] Allowance for credit losses at June 30, 2023; allowance for loan losses for prior period.