Note 17 - Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Accumulated other comprehensive income (loss), before tax		$ (2,069)	$ 675
Unrealized holding gain on available-for-sale securities arising during the period, before tax		4,612	(2,711)
Amounts reclassified from accumulated other comprehensive income, before tax	[1],[2]	(561)	(33)
Net current period other comprehensive income (loss), before tax		4,051	(2,744)
Accumulated other comprehensive income (loss), before tax		1,982	(2,069)
Accumulated other comprehensive income (loss), tax		434	(230)
Unrealized holding loss on available-for-sale securities arising during the period, tax		(968)	638
Amounts reclassified from accumulated other comprehensive income, tax	[1],[2]	118	12
Net current period other comprehensive income (loss), tax		(850)	650
Accumulated other comprehensive income (loss), tax, reclassification of disproportional tax effect			14
Accumulated other comprehensive income (loss), tax, before reclassification of disproportional tax effect		(416)
Accumulated other comprehensive income (loss), net		(1,635)	445
Unrealized holding gain (loss) on available-for-sale securities arising during the period, net		3,644	(2,073)
Amounts reclassified from accumulated other comprehensive income, net	[1],[2]	(443)	(21)
Other comprehensive income (loss)		3,201	(2,094)
Accumulated other comprehensive income (loss), net, reclassification of disproportional tax effect		$ 1,566	$ 14

[1] Income tax expense

[2] Securities gain, net