Regulatory Capital Requirements - Schedule of Actual Capital Amounts and Ratios (Details) $ in Thousands	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Total Capital (to Risk- Weighted Assets), Actual Amount	$ 68,071	$ 47,809
Tier 1 Capital (to Risk- Weighted Assets), Actual Amount	63,329	43,355
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual Amount	63,329	43,355
Tier 1 Capital (to Average Assets), Actual Amount	$ 63,329	$ 43,355
Total Capital (to Risk- Weighted Assets), Actual Ratio	0.1801	0.1345
Tier 1 Capital (to Risk- Weighted Assets), Actual Ratio	0.1675	0.122
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual Ratio	0.1675	0.122
Tier 1 Capital (to Average Assets), Actual Ratio	0.1398	0.1012
Total Capital (to Risk- Weighted Assets), Minimum Required for Capital Adequacy Purposes, Amount	$ 30,244	$ 28,432
Tier 1 Capital (to Risk- Weighted Assets), Minimum Required for Capital Adequacy Purposes, Amount	22,683	21,324
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Required for Capital Adequacy Purposes, Amount	17,012	15,993
Tier 1 Capital (to Average Assets), Minimum Required for Capital Adequacy Purposes, Amount	$ 18,125	$ 17,139
Total Capital (to Risk- Weighted Assets), Minimum Required for Capital Adequacy Purposes, Ratio	0.08	0.08
Tier 1 Capital (to Risk- Weighted Assets), Minimum Required for Capital Adequacy Purposes, Ratio	0.06	0.06
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Required for Capital Adequacy Purposes, Ratio	0.045	0.045
Tier 1 Capital (to Average Assets), Minimum Required for Capital Adequacy Purposes, Ratio	0.04	0.04
Total Capital (to Risk- Weighted Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Amount	$ 37,805	$ 35,540
Tier 1 Capital (to Risk- Weighted Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Amount	30,244	28,432
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Amount	24,573	23,101
Tier 1 Capital (to Average Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Amount	$ 22,656	$ 21,424
Total Capital (to Risk- Weighted Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	0.10	0.10
Tier 1 Capital (to Risk- Weighted Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	0.08	0.08
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	0.065	0.065
Tier 1 Capital (to Average Assets), Minimum Required To be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	0.05	0.05