Note 11 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Balances of Other Comprehensive Income (Loss) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 258,871,000	$ 276,732
Balance	264,341,000	258,871,000
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(6,142,000)	(427,000)
Other comprehensive income (loss) before reclassifications	2,915,000	(5,766,000)
Amounts reclassified from accumulated other comprehensive income (loss)	(90,000)	51,000
Net current period other comprehensive income (loss)	2,825,000	(5,715,000)
Balance	(3,317,000)	(6,142,000)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	(107,000)	55,000
Other comprehensive income (loss) before reclassifications	16,000	(1,316,000)
Amounts reclassified from accumulated other comprehensive income (loss)	1,079,000	1,154,000
Net current period other comprehensive income (loss)	1,095,000	(162,000)
Balance	988,000	(107,000)
AOCI Attributable to Parent [Member]
Balance	(6,249,000)	(372,000)
Other comprehensive income (loss) before reclassifications	2,931,000	(7,082,000)
Amounts reclassified from accumulated other comprehensive income (loss)	989,000	1,205,000
Net current period other comprehensive income (loss)	3,920,000	(5,877,000)
Balance	$ (2,329,000)	$ (6,249,000)