Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017
Numerator:
Net income	$ 1,773	$ 651
Denominator
Basic weighted average common shares outstanding (in shares)	10,631,508	11,647,106
Dilutive restricted stock grants (in shares)	70,753	186,399
Diluted weighted average common shares outstanding (in shares)	10,702,261	11,833,505
Basic earnings per share (in dollars per share)	$ 0.17	$ 0.06
Diluted earnings per share (in dollars per share)	$ 0.17	$ 0.06
Total ESOP shares	1,048,029		1,048,029
Unallocated shares	913,113	964,461	926,334
Antidilutive securities excluded from computation of earnings per share (in shares)		0
Restricted Stock Award
Denominator
Antidilutive securities excluded from computation of earnings per share (in shares)	(2,718)