Premises and Equipment - Calculated amount of right of use assets and lease liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2020
ROU assets obtained in exchange for operating lease obligations:				$ 1,996
Consolidated Balance Sheet
Operating leases right of use asset	$ 1,926		$ 1,926		$ 1,965
Operating leases liability	1,926		1,926		$ 1,965
Consolidated Statement of Income
Operating lease costs classified as occupancy and equipment expense	63	$ 52	135	109
Supplemental disclosures of cash flow information
ROU assets obtained in exchange for operating lease obligations:				2,004
Supplemental disclosures of cash flow information | Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 58	$ 39	$ 126	$ 78