Loans Receivable (Past Due Loans) (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 1,591,641	$ 2,409,177
Current	64,004,101	66,559,852
Total loans receivable	65,595,742	68,969,029
Recorded investment, 90 days past due and still accruing	0	398,434
30 to 59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	409,729	792,062
60 to 89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	342,468	795,951
90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	839,444	821,164
One-to-four family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	921,591	1,600,382
Current	52,172,669	54,490,976
Total loans receivable	53,094,260	56,091,358
Recorded investment, 90 days past due and still accruing	0	341,167
One-to-four family residential | 30 to 59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	342,544	566,234
One-to-four family residential | 60 to 89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	249,985	542,356
One-to-four family residential | 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	329,062	491,792
Non-owner occupied one-to-four family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	175,812	194,898
Current	2,987,651	2,921,934
Total loans receivable	3,163,463	3,116,832
Recorded investment, 90 days past due and still accruing	0	0
Non-owner occupied one-to-four family residential | 30 to 59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	17,861
Non-owner occupied one-to-four family residential | 60 to 89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	177,037
Non-owner occupied one-to-four family residential | 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	175,812	0
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	275,515	310,982
Current	2,559,340	3,304,369
Total loans receivable	2,834,855	3,615,351
Recorded investment, 90 days past due and still accruing	0	0
Commercial real estate | 30 to 59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	36,178
Commercial real estate | 60 to 89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
Commercial real estate | 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	275,515	274,804
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	218,723	302,915
Current	6,284,441	5,842,573
Total loans receivable	6,503,164	6,145,488
Recorded investment, 90 days past due and still accruing	0	57,267
Consumer | 30 to 59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	67,185	171,789
Consumer | 60 to 89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	92,483	76,558
Consumer | 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 59,055	$ 54,568