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Loans - Loans by class based on payment activity (Details)	Jun. 30, 2023 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 199,935,846
Residential | One-to-four-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	59,562,818
Residential | One-to-four-family residential | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	59,562,818
Residential | Multi-family real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	44,183,871
Residential | Multi-family real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	44,183,871
Residential Real Estate And Consumer Portfolio
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	106,571,436
Residential Real Estate And Consumer Portfolio | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	106,571,436
Consumer Loans | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,824,747
Consumer Loans | Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 2,824,747

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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