Loans Receivable (Past Due Loans) (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 1,231,016	$ 1,675,786
Current	70,800,907	62,636,906
Total loans receivable	72,031,923	64,312,692
Recorded investment, greater than 90 days past due and still accruing	0	0
30 to 59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	599,982	936,557
60 to 89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	175,006	306,516
90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	456,028	432,713
One-to-four family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,163,892	1,358,832
Current	55,377,120	50,976,173
Total loans receivable	56,541,012	52,335,005
Recorded investment, greater than 90 days past due and still accruing	0	0
One-to-four family residential \| 30 to 59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	558,307	706,658
One-to-four family residential \| 60 to 89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	155,244	283,116
One-to-four family residential \| 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	450,341	369,058
Non-owner occupied one-to-four family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	6,865	0
Current	3,205,100	3,013,417
Total loans receivable	3,211,965	3,013,417
Recorded investment, greater than 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	6,865	0
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	0
Non-owner occupied one-to-four family residential \| 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
Current	5,367,251	2,162,851
Total loans receivable	5,367,251	2,162,851
Recorded investment, greater than 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	0
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	0	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	60,259	316,954
Current	6,851,436	6,484,465
Total loans receivable	6,911,695	6,801,419
Recorded investment, greater than 90 days past due and still accruing	0	0
Consumer \| 30 to 59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	34,810	229,899
Consumer \| 60 to 89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	19,762	23,400
Consumer \| 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 5,687	$ 63,655

WCF Bancorp, Inc. 10-Q