Loans Receivable, Net (Schedule of non-accrual loans by category) (Details) - USD ($)		9 Months Ended
		Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 2,933,570	$ 3,125,472
FInancing Receivable, Recorded Investment, Nonaccrual Status, Percentage	[1]	0.60%	0.70%
Financing Receivable Recorded Investment in Non-accrual Status, Increase (Decrease)		$ (191,902)
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		(6.10%)
Residential Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 1,506,923	$ 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)		$ (175,317)
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		(10.40%)
Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 70,031	$ 100,408
FInancing Receivable, Recorded Investment, Nonaccrual Status, Percentage	[1]	0.00%	0.00%
Financing Receivable Recorded Investment in Non-accrual Status, Increase (Decrease)		$ (30,377)
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		(30.30%)
Commercial Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 1,145,783	$ 939,946
FInancing Receivable, Recorded Investment, Nonaccrual Status, Percentage	[1]	0.20%	0.20%
Financing Receivable Recorded Investment in Non-accrual Status, Increase (Decrease)		$ 205,837
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		21.90%
Consumer [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual		$ 210,833	$ 402,878
FInancing Receivable, Recorded Investment, Nonaccrual Status, Percentage	[1]	0.10%	0.10%
Financing Receivable Recorded Investment in Non-accrual Status, Increase (Decrease)		$ (192,045)
Financing Receivable Recorded Investment in Non-accrual Status, Percent, Increase (Decrease)		(47.70%)

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