Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Jul. 01, 2021	Jul. 01, 2020
Life Insurance Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit plan expense	$ 13		$ (16)		$ (12)
Accrued interest payable and other liabilities Total	141		154
401 (k) plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total contributions	$ 343		293		188
Percentage of amount allowable under federal tax regulations	50.00%
Percentage of compensation contributed under federal tax regulations	8.00%
Salary Continuation Agreement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit plan expense	$ 7		7		$ 8
Accrued interest payable and other liabilities Total	134		$ 152
Annual benefit for 20 years	$ 25
Duration of Annual benefit	20 years
Multi-employer pension plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Funding (surplus) shortfall		$ (8)		$ 104
CFBank's contributions		$ 22		29		$ 59
Funded status							100.81%	90.19%
Total contributions				$ 253,199		$ 138,322
Percentage of amount allowable under federal tax regulations				5.00%		5.00%