Summary of Significant Accounting Policies (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2020 USD ($) Office shares	Jun. 30, 2019 USD ($)
Nature of Operations [Abstract]
Number of offices | Office	16
Cash and Cash Equivalents [Abstract]
Interest-bearing deposits in banks and other financial institutions	$ 30,100	$ 19,300
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]
Number of shares authorized for repurchase (in shares) | shares	200,000
Total number of shares repurchased under the plan (in shares) | shares	24,400
Federal Home Loan Bank Stock [Abstract]
Other-than-temporary impairment charge	$ 0	0
Advertising [Abstract]
Advertising expense	473	461
Impact of Recent Accounting Pronouncements [Abstract]
Operating lease ROU assets	1,575
Operating lease liabilities	$ 1,587
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 2016-02 [Member]
Impact of Recent Accounting Pronouncements [Abstract]
Operating lease ROU assets		1,700
Operating lease liabilities		$ 1,700