Note 7 - Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Accumulated other comprehensive income (loss), before tax	$ (47,698)	$ (44,111)	$ (37,925)	$ (27,982)
Accumulated other comprehensive income (loss), tax	10,017	9,263	7,964	5,876
Accumulated other comprehensive income (loss), net	(37,681)	(34,848)	(29,961)	(22,106)
Unrealized holding losses on available-for-sale securities arising during the period, before tax	15,656	5,429	5,804	(10,711)
Unrealized holding losses on available-for-sale securities arising during the period, tax	(3,288)	(1,140)	(1,219)	2,249
Unrealized holding losses on available-for-sale securities arising during the period, net of tax	12,368	4,289	4,585	(8,462)
Accumulated other comprehensive income (loss), before tax	(32,042)	(38,678)	(32,042)	(38,678)
Accumulated other comprehensive income (loss), tax	6,729	8,122	6,729	8,122
Accumulated other comprehensive income (loss), net	(25,313)	(30,556)	(25,313)	(30,556)
Amounts reclassified from accumulated other comprehensive loss, before tax	0	4	79	15
Amounts reclassified from accumulated other comprehensive loss, tax		(1)	(16)	(3)
Amounts reclassified from accumulated other comprehensive loss, net of tax		3	63	12
Net current period other comprehensive loss, before tax		5,433	5,883	(10,696)
Net current period other comprehensive loss, tax		(1,141)	(1,235)	(2,246)
Other comprehensive income	12,368	4,292	4,648	(8,450)
Net current period other comprehensive loss, tax		1,141	1,235	2,246
Other comprehensive income	$ 12,368	$ 4,292	$ 4,648	$ (8,450)