Loans and Allowance for Credit Losses - Allowance for off-balance credit exposure (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	$ 6,288	$ 3,358	$ 1,805
Provision (benefit) charged to expense	(3,025)	2,930	1,553
Balance, end of period	3,263	6,288	3,358
Citizens Bancshares Company
Allowance for off-balance sheet credit exposure:
Balance, end of period	1,800
Residential Real Estate
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	71	58	37
Provision (benefit) charged to expense	16	13	21
Balance, end of period	87	71	58
Construction Real Estate
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	4,809	2,178	502
Provision (benefit) charged to expense	(2,917)	2,631	1,676
Balance, end of period	1,892	4,809	2,178
Commercial Real Estate
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	475	421	188
Provision (benefit) charged to expense	(105)	54	233
Balance, end of period	370	475	421
Consumer
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	73	61	218
Provision (benefit) charged to expense	3	12	(157)
Balance, end of period	76	73	61
Commercial
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	860	640	860
Provision (benefit) charged to expense	(22)	220	(220)
Balance, end of period	$ 838	$ 860	$ 640