Condensed Parent Company Only Financial Information - CONDENSED STATEMENT OF OPERATIONS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Loss Before Income Tax Benefit	$ (1,436)	$ 946
Income Tax Benefit	(358)	149
Net Loss	(1,078)	$ 797
Fifth District Bancorp, Inc | Fifth District Bancorp, Inc
Equity in Undistributed Losses of Subsidiary	(91)
Total Income	(91)
Operating Expenses	1,250
Total Expense	1,250
Loss Before Income Tax Benefit	(1,341)
Income Tax Benefit	(263)
Net Loss	$ (1,078)