Loans Receivable, Net (Schedule of loans evaluated individually for impairment and collectively evaluated for impairment in loans receivable) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 637,314	$ 738,662
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	8,161,241	8,433,055
Financing Receivable, Allowance for Credit Losses	8,798,555	9,171,717
Financing Receivable, Individually Evaluated for Impairment	5,497,920	9,364,125
Financing Receivable, Collectively Evaluated for Impairment	439,202,732	435,555,970
Financing Receivable, Gross	$ 444,700,652	444,920,095
Loans and Leases Receivable, Valuation Period for New Appraisal	24 months
Residential Real Estate 1 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,147,670	1,191,443
Financing Receivable, Allowance for Credit Losses	1,147,670	1,191,443
Financing Receivable, Individually Evaluated for Impairment	1,345,077	1,700,861
Financing Receivable, Collectively Evaluated for Impairment	85,163,080	82,264,555
Financing Receivable, Gross	86,508,157	83,965,416
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	72,314	73,662
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,048,891	1,129,931
Financing Receivable, Allowance for Credit Losses	1,121,205	1,203,593
Financing Receivable, Individually Evaluated for Impairment	210,749	1,060,043
Financing Receivable, Collectively Evaluated for Impairment	56,001,841	55,847,512
Financing Receivable, Gross	56,212,590	56,907,555
Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	991,982	923,600
Financing Receivable, Allowance for Credit Losses	991,982	923,600
Financing Receivable, Individually Evaluated for Impairment	77,206	77,206
Financing Receivable, Collectively Evaluated for Impairment	28,350,682	28,009,480
Financing Receivable, Gross	28,427,888	28,086,686
Commercial Real Estate 1 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	565,000	665,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	4,972,698	5,188,081
Financing Receivable, Allowance for Credit Losses	5,537,698	5,853,081
Financing Receivable, Individually Evaluated for Impairment	3,864,888	6,526,015
Financing Receivable, Collectively Evaluated for Impairment	269,687,129	269,434,423
Financing Receivable, Gross	$ 273,552,017	$ 275,960,438