Loans and Allowance for Loan Losses - Aging analysis (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 208,613	$ 999,847
Current	181,342,548	172,852,169
Total Loans Receivable	181,551,161	173,852,016
Total Loans > 90 Days & Accruing	0	0
One- to Four- Family Mortgage Loans Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	110,934	921,856
Current	91,808,130	92,737,664
Total Loans Receivable	91,919,064	93,659,520
Total Loans > 90 Days & Accruing	0	0
One To Four Family Investment Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	12,846,342	14,242,563
Total Loans Receivable	12,846,342	14,242,563
Total Loans > 90 Days & Accruing	0	0
Multi-Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	36,628,238	27,140,014
Total Loans Receivable	36,628,238	27,140,014
Total Loans > 90 Days & Accruing	0	0
Nonresidential Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	67,829
Current	23,377,598	18,862,597
Total Loans Receivable	23,377,598	18,930,426
Total Loans > 90 Days & Accruing	0	0
Construction & Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	5,329,188	7,293,737
Total Loans Receivable	5,329,188	7,293,737
Total Loans > 90 Days & Accruing	0	0
Real Estate Secured Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	97,679	9,634
Current	9,932,238	11,364,341
Total Loans Receivable	10,029,917	11,373,975
Total Loans > 90 Days & Accruing	0	0
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	557,268	415,730
Total Loans Receivable	557,268	415,730
Total Loans > 90 Days & Accruing	0	0
Other Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	528
Current	863,546	795,523
Total Loans Receivable	863,546	796,051
Total Loans > 90 Days & Accruing	0	0
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	97,679	168,566
Financing Receivables, 30 to 59 Days Past Due | One- to Four- Family Mortgage Loans Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	158,932
Financing Receivables, 30 to 59 Days Past Due | One To Four Family Investment Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due | Multi-Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due | Nonresidential Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due | Construction & Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due | Real Estate Secured Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	97,679	9,634
Financing Receivables, 30 to 59 Days Past Due | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	86,900
Financing Receivables, 60 to 89 Days Past Due | One- to Four- Family Mortgage Loans Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	86,900
Financing Receivables, 60 to 89 Days Past Due | One To Four Family Investment Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due | Multi-Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due | Nonresidential Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due | Construction & Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due | Real Estate Secured Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, Equal to 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	110,934	744,381
Financing Receivables, Equal to 90 Days and Greater Past Due | One- to Four- Family Mortgage Loans Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	110,934	676,024
Financing Receivables, Equal to 90 Days and Greater Past Due | One To Four Family Investment Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, Equal to 90 Days and Greater Past Due | Multi-Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, Equal to 90 Days and Greater Past Due | Nonresidential Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	67,829
Financing Receivables, Equal to 90 Days and Greater Past Due | Construction & Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, Equal to 90 Days and Greater Past Due | Real Estate Secured Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, Equal to 90 Days and Greater Past Due | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, Equal to 90 Days and Greater Past Due | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 0	$ 528