Note 6 - Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2018		Dec. 31, 2017
Accumulated other comprehensive income (loss), before tax		$ (3,549)		$ 741	$ (2,069)		$ 675
Unrealized holding gain (loss) on available-for-sale securities arising during the period, before tax		1,787		(631)	894		(527)
Amounts reclassified from accumulated other comprehensive income, before tax		27	[1],[2]		(560)	[1],[2]	(38)	[1],[2]
Net current period other comprehensive income (loss), before tax		1,814			334		(565)
Accumulated other comprehensive income (loss), before tax		(1,735)		110	(1,735)		110
Accumulated other comprehensive income (loss), tax		746		(252)	434		(230)
Unrealized holding gain (loss) on available-for-sale securities arising during the period, tax		(376)		215	(188)		180
Amounts reclassified from accumulated other comprehensive income, tax	[1],[2]	(6)			118		13
Net current period other comprehensive loss, tax		(382)			(70)		193
Accumulated other comprehensive income (loss), tax		364		(37)	364		(37)
Accumulated other comprehensive income (loss), net		(2,803)		489	(1,635)		445
Unrealized holding gain (loss) on available-for-sale securities arising during the period, net		1,411		(416)	706		(347)
Amounts reclassified from accumulated other comprehensive income, net	[1],[2]	21			(442)		(25)
Other comprehensive income (loss)		1,432		(416)	264		(372)
Accumulated other comprehensive income (loss), net		$ (1,371)		$ 73	$ (1,371)		$ 73

[1] Income tax expense

[2] Securities (gains) losses, net