Note 18 - Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Accumulated other comprehensive income (loss), before tax		$ 1,982	$ (2,069)
Accumulated other comprehensive income (loss), tax		(416)	434
Accumulated other comprehensive income (loss), net		1,566	(1,635)
Unrealized holding gain on available-for-sale securities arising during the period, before tax		3,766	4,612
Unrealized holding gain on available-for-sale securities arising during the period, tax		(791)	(968)
Unrealized holding gain on available-for-sale securities arising during the period, net		2,975	3,644
Amounts reclassified from accumulated other comprehensive income, before tax	[1],[2]	(355)	(561)
Amounts reclassified from accumulated other comprehensive income, tax	[1],[2]	74	118
Amounts reclassified from accumulated other comprehensive income, net	[1],[2]	(281)	(443)
Net current period other comprehensive income, before tax		3,411	4,051
Net current period other comprehensive income, tax		(717)	(850)
Other comprehensive income		2,694	3,201
Accumulated other comprehensive income (loss), before tax		5,393	1,982
Accumulated other comprehensive income (loss), tax		(1,133)	(416)
Accumulated other comprehensive income (loss), net		$ 4,260	$ 1,566

[1] Income tax expense

[2] Securities gain, net