Loans Receivable, Net (Schedule of non-accrual loans by category) (Details) - USD ($)		3 Months Ended
		Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 3,711,658	$ 3,125,472
FInancing Receivable, Recorded Investment, Nonaccrual Status, Percentage	[1]	0.70%	0.70%
Financing Receivable Recorded Investment in Non-accrual Status, Increase (Decrease)		$ 586,186
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		18.80%
Residential Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 1,586,738	$ 1,682,240
FInancing Receivable, Recorded Investment, Nonaccrual Status, Percentage	[1]	0.30%	0.40%
Financing Receivable Recorded Investment in Non-accrual Status, Increase (Decrease)		$ (95,502)
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		(5.70%)
Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 90,811	$ 100,408
FInancing Receivable, Recorded Investment, Nonaccrual Status, Percentage	[1]	0.00%	0.00%
Financing Receivable Recorded Investment in Non-accrual Status, Increase (Decrease)		$ (9,597)
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		(9.60%)
Commercial Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 1,666,481	$ 939,946
FInancing Receivable, Recorded Investment, Nonaccrual Status, Percentage	[1]	0.30%	0.20%
Financing Receivable Recorded Investment in Non-accrual Status, Increase (Decrease)		$ 726,535
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		77.30%
Consumer [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 367,628	$ 402,878
FInancing Receivable, Recorded Investment, Nonaccrual Status, Percentage	[1]	0.10%	0.10%
Financing Receivable Recorded Investment in Non-accrual Status, Increase (Decrease)		$ (35,250)
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		(8.70%)

[1] PERCENT OF TOTAL LOANS HELD FOR INVESTMENT, NET OF DEFERRED FEES AND LOANS IN PROCESS.