Note 3 - Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Balance	$ 396,838	$ 426,635	$ 436,714	$ 392,995	$ 397,108	$ 404,482	$ 436,714	$ 404,482
Other comprehensive income (loss), net of tax	668	45	(1,677)	1,093	(385)	604	(964)	1,312
Balance	355,186	396,838	426,635	402,986	392,995	397,108	355,186	402,986
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(3,246)	(2,313)	(185)	633	835	1,224	(185)	1,224
Change in unrealized gains (losses) during the period	(492)	(933)	(2,070)	(257)	(273)	(501)
Net gains reclassified into income during the period	0	0	0	5	8	8
Income tax provision	0	0	(58)	60	63	104
Other comprehensive income (loss), net of tax	(492)	(933)	(2,128)	(192)	(202)	(389)
Balance	(3,738)	(3,246)	(2,313)	441	633	835	(3,738)	441
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	2,621	1,643	1,192	(898)	(715)	(1,708)	1,192	(1,708)
Change in unrealized gains (losses) during the period	1,877	1,548	648	1,367	(394)	1,092
Net gains reclassified into income during the period	(355)	(244)	(60)	318	152	192
Income tax provision	(362)	(326)	(137)	(400)	59	(291)
Other comprehensive income (loss), net of tax	1,160	978	451	1,285	(183)	993
Balance	3,781	2,621	1,643	387	(898)	(715)	3,781	387
AOCI Attributable to Parent [Member]
Balance	(625)	(670)	1,007	(265)	120	(484)	1,007	(484)
Change in unrealized gains (losses) during the period	1,385	615	(1,422)	1,110	(667)	591
Net gains reclassified into income during the period	(355)	(244)	(60)	323	160	200
Income tax provision	(362)	(326)	(195)	(340)	122	(187)
Other comprehensive income (loss), net of tax	668	45	(1,677)	1,093	(385)	604
Balance	$ 43	$ (625)	$ (670)	$ 828	$ (265)	$ 120	$ 43	$ 828