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, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 102,756	$ 0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	8,101,260	8,221,618
Financing Receivable, Allowance for Credit Losses	8,204,016	8,221,618
Financing Receivable, Individually Evaluated for Impairment	8,790,393	8,442,306
Financing Receivable, Collectively Evaluated for Impairment	420,139,808	394,167,077
Financing Receivable, Gross	$ 428,930,201	402,609,383
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	1,207,254	1,233,843
Financing Receivable, Allowance for Credit Losses	1,207,254	1,233,843
Financing Receivable, Individually Evaluated for Impairment	1,685,496	1,883,741
Financing Receivable, Collectively Evaluated for Impairment	81,904,415	79,371,426
Financing Receivable, Gross	83,589,911	81,255,167
Consumer [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	1,042,150	1,144,815
Financing Receivable, Allowance for Credit Losses	1,042,150	1,144,815
Financing Receivable, Individually Evaluated for Impairment	178,778	181,617
Financing Receivable, Collectively Evaluated for Impairment	56,809,152	56,580,078
Financing Receivable, Gross	56,987,930	56,761,695
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	1,128,680	1,011,227
Financing Receivable, Allowance for Credit Losses	1,128,680	1,011,227
Financing Receivable, Individually Evaluated for Impairment	90,001	100,401
Financing Receivable, Collectively Evaluated for Impairment	27,328,239	26,677,492
Financing Receivable, Gross	27,418,240	26,777,893
Commercial Real Estate 1 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	102,756	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	4,723,176	4,831,733
Financing Receivable, Allowance for Credit Losses	4,825,932	4,831,733
Financing Receivable, Individually Evaluated for Impairment	6,836,118	6,276,547
Financing Receivable, Collectively Evaluated for Impairment	254,098,002	231,538,081
Financing Receivable, Gross	$ 260,934,120	$ 237,814,628