Note 7 - Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Accumulated other comprehensive income (loss), before tax		$ 5,733	$ 2,662	$ 5,393	$ 1,982
Accumulated other comprehensive income (loss), tax		(1,204)	(560)	(1,133)	(416)
Accumulated other comprehensive income (loss), net		4,529	2,102	4,260	1,566
Unrealized holding losses on securities arising during the period		(2,269)	1,900	(1,921)	2,690
Unrealized holding losses on securities arising during the period		477	(399)	404	(566)
Unrealized holding losses on securities arising during the period		(1,792)	1,501	(1,517)	2,124
Amounts reclassified from accumulated other comprehensive income, before tax	[1],[2]	(6)	(121)	(14)	(231)
Amounts reclassified from accumulated other comprehensive income, tax	[1],[2]	1	26	3	49
Amounts reclassified from accumulated other comprehensive income, net	[1],[2]	(5)	(95)	(11)	(182)
Net current period other comprehensive loss, before tax		(2,275)	1,779	(1,935)	2,459
Net current period other comprehensive loss, tax		478	(373)	407	(517)
Other comprehensive income (loss)		(1,797)	1,406	(1,528)	1,942
Accumulated other comprehensive income (loss), before tax		3,458	4,441	3,458	4,441
Accumulated other comprehensive income (loss), tax		(726)	(933)	(726)	(933)
Accumulated other comprehensive income (loss), net		$ 2,732	$ 3,508	$ 2,732	$ 3,508

[1] Income tax expense

[2] Securities (gains) losses, net