Summary of Significant Accounting Policies (Details) $ in Thousands		12 Months Ended
		Jun. 30, 2019 USD ($) Office shares	Jun. 30, 2018 USD ($) shares
Nature of Operations [Abstract]
Number of offices | Office		15
Cash and Cash Equivalents [Abstract]
Interest-bearing deposits in banks and other financial institutions		$ 19,300	$ 16,700
Income Recognition on Impaired and Nonaccrual loans [Abstract]
Threshold period of delinquency after which a loan is placed on nonaccrual status		90 days
Treasury Stock [Abstract]
Total number of shares repurchased under the plan (in shares) | shares		124,956
Stock repurchased (in shares) | shares		0	0
Federal Home Loan Bank Stock [Abstract]
Other-than-temporary impairment charge		$ 0	$ 0
Advertising [Abstract]
Advertising expense		461	354
Impact of Recent Accounting Pronouncements [Abstract]
Equity investments, fair value		$ 253	217
Maximum [Member]
Treasury Stock [Abstract]
Number of shares authorized for repurchase (in shares) | shares		184,692
Building and Improvements [Member]
Premises and Equipment [Abstract]
Property, plant and equipment, useful life		39 years
Furniture and Equipment [Member] | Minimum [Member]
Premises and Equipment [Abstract]
Property, plant and equipment, useful life		3 years
Furniture and Equipment [Member] | Maximum [Member]
Premises and Equipment [Abstract]
Property, plant and equipment, useful life		8 years
ASU 2016-01 [Member]
Impact of Recent Accounting Pronouncements [Abstract]
Equity investments, amortized cost			62
Equity investments, fair value			217
Cumulative-effect adjustment to increase retained earnings	[1]		0
ASU 2016-01 [Member] | Retained Earnings [Member]
Impact of Recent Accounting Pronouncements [Abstract]
Cumulative-effect adjustment to increase retained earnings	[1]		$ 114

[1] See Note 1 Impact of Recent Accounting Pronouncements - cumulative effect of change in measurement of equity securities.