Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Unearned ESOP Shares	Accumulated Other Comprehensive Income (Loss), Net of Tax
Shares, beginning balance at Jun. 30, 2016		12,676,660
Beginning balance at Jun. 30, 2016	$ 189,741	$ 127	$ 122,595	$ 77,301	$ (12,177)	$ 1,895
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	651			651
Common stock repurchased, shares		(99,314)
Common stock repurchased	(1,333)	$ (1)	(992)	(340)
Restricted stock awards net of forfeitures, shares		390,000
Restricted stock awards net of forfeitures	0	$ 4	(4)
Other comprehensive income (loss), net of tax	(236)					(236)
Share-based compensation	256		256
ESOP shares committed to be released	195		30		165
Shares, ending balance at Sep. 30, 2016		12,967,346
Ending balance at Sep. 30, 2016	$ 189,274	$ 130	121,885	77,612	(12,012)	1,659
Shares, beginning balance at Jun. 30, 2017	11,902,146	11,902,146
Beginning balance at Jun. 30, 2017	$ 177,721	$ 119	112,058	77,515	(11,537)	(434)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,773			1,773
Common stock repurchased, shares		(96,900)
Common stock repurchased	(1,532)	$ (1)	(968)	(563)
Restricted stock awards net of forfeitures, shares		50,000
Restricted stock awards net of forfeitures	0
Other comprehensive income (loss), net of tax	(283)					(283)
Share-based compensation	321		321
ESOP shares committed to be released	210		46		164
Restricted stock awards canceled		(15,539)
Restricted stock awards canceled upon vesting, amount	$ (282)		(282)
Shares, ending balance at Sep. 30, 2017	11,839,707	11,839,707
Ending balance at Sep. 30, 2017	$ 177,928	$ 118	$ 111,175	$ 78,725	$ (11,373)	$ (717)