Note 7 - Accumulated Other Comprehensive Loss - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Accumulated other comprehensive income (loss), before tax	$ (37,925)	$ (27,982)
Accumulated other comprehensive income (loss), tax	7,964	5,876
Accumulated other comprehensive income (loss), net	(29,961)	(22,106)
Unrealized holding losses on available-for-sale securities arising during the period, before tax	(9,852)	(16,140)
Unrealized holding losses on available-for-sale securities arising during the period, tax	2,069	3,389
Unrealized holding losses on available-for-sale securities arising during the period, net of tax	(7,783)	(12,751)
Amounts reclassified from accumulated other comprehensive loss, before tax	79	11
Amounts reclassified from accumulated other comprehensive loss, tax	(16)	(2)
Amounts reclassified from accumulated other comprehensive loss, net of tax	63	9
Net current period other comprehensive loss, before tax	(9,773)	(16,129)
Net current period other comprehensive loss, tax	2,053	3,387
Other comprehensive loss	(7,720)	(12,742)
Accumulated other comprehensive income (loss), before tax	(47,698)	(44,111)
Accumulated other comprehensive income (loss), tax	10,017	9,263
Accumulated other comprehensive income (loss), net	$ (37,681)	$ (34,848)