Loans Receivable (Loans on Nonaccrual Status) (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, nonaccrual status	$ 358,630	$ 425,429
One-to-four family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, nonaccrual status	83,115	150,625
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, nonaccrual status	$ 275,515	$ 274,804