Note 6 - Accumulated Other Comprehensive Income - Components of Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Accumulated other comprehensive income (loss), before tax		$ 73	$ 2,932	$ 73	$ 2,932	$ (246)	$ 3,621	$ 1,731	$ 1,363
Accumulated other comprehensive income (loss), tax		(26)	(997)	(26)	(997)	83	(1,232)	(589)	(464)
Accumulated other comprehensive income		47	1,935	47	1,935	$ (163)	$ 2,389	$ 1,142	$ 899
Unrealized holding gain on available-for-sale securities arising during the period		336	1,288	(3,406)	1,691
Unrealized holding gain on available-for-sale securities arising during the period		(114)	438	1,158	574
Unrealized holding gain on available-for-sale securities arising during the period		222	850	(2,248)	1,117
Amounts reclassified from accumulated other comprehensive income	[1],[2]	(17)	(87)	(142)	(122)
Amounts reclassified from accumulated other comprehensive income	[1],[2]	5	30	48	41
Amounts reclassified from accumulated other comprehensive income	[1],[2]	(12)	(57)	(94)	(81)
Net current period other comprehensive income		319	1,201	(3,548)	1,569
Net current period other comprehensive income		(109)	(408)	1,206	(533)
Net current period other comprehensive income		210	793	(2,342)	1,036
Unrealized holding gain on available-for-sale securities arising during the period		$ 114	$ (438)	$ (1,158)	$ (574)

[1] Income tax expense

[2] Securities gain, net