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Loans Receivable, Net (Schedule of non-accrual loans by category) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status, Percentage (1) [1] 1.60% 1.40%
Financing Receivable, Recorded Investment, Nonaccrual Status, Amount, Increase (Decrease) $ 1,330,740  
Financing Receivable, Recorded Investment, Nonaccrual Status, Percent, Increase (Decrease) 23.30%  
Financing Receivable, Recorded Investment, Past Due $ 6,700,027 $ 6,996,614
Residential Real Estate    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status, Percentage (1) [1] 0.50% 0.50%
Financing Receivable, Recorded Investment, Nonaccrual Status, Amount, Increase (Decrease) $ 136,346  
Financing Receivable, Recorded Investment, Nonaccrual Status, Percent, Increase (Decrease) 7.00%  
Financing Receivable, Recorded Investment, Past Due $ 829,713 $ 1,344,638
Commercial Business    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status, Percentage (1) [1] 0.00% 0.00%
Financing Receivable, Recorded Investment, Nonaccrual Status, Amount, Increase (Decrease) $ 15,057  
Financing Receivable, Recorded Investment, Nonaccrual Status, Percent, Increase (Decrease) 13.80%  
Financing Receivable, Recorded Investment, Past Due $ 330,424 $ 287,770
Commercial Real Estate    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status, Percentage (1) [1] 0.80% 0.80%
Financing Receivable, Recorded Investment, Nonaccrual Status, Amount, Increase (Decrease) $ 223,590  
Financing Receivable, Recorded Investment, Nonaccrual Status, Percent, Increase (Decrease) 6.70%  
Financing Receivable, Recorded Investment, Past Due $ 3,615,736 $ 4,491,462
Consumer    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing Receivable, Recorded Investment, Past Due $ 1,924,154 $ 872,744
[1] PERCENT OF GROSS LOANS RECEIVABLE HELD FOR INVESTMENT, NET OF DEFERRED FEES AND LOANS IN PROCESS.