Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016
Numerator:
Net income	$ 1,188	$ 713	$ 1,839	$ 1,941
Denominator for basic and diluted earnings per share
Basic weighted average common shares outstanding (in shares)	11,168,942	12,094,515	11,409,649	12,094,515
Dilutive restricted stock grants (in shares)	75,287	0	42,368	0
Diluted weighted average common shares outstanding (in shares)	11,244,229	12,094,515	11,452,017	12,094,515
Basic earnings per share (in dollars per share)	$ 0.11	$ 0.06	$ 0.16	$ 0.16
Diluted earnings per share (in dollars per share)	$ 0.11	$ 0.06	$ 0.16	$ 0.16
Total ESOP shares	1,048,029		1,048,029		1,048,029
Unallocated shares	951,249		951,249		977,673