Allowance for Loan Losses (Credit Quality Indicators by Loan Segment) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	$ 64,312,692	$ 68,969,029
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	62,054,000	65,960,593
Special mention/watch
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	1,613,977	1,719,095
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	644,715	1,289,341
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	0	0
One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	52,335,005	56,091,358
One-to-four family residential \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	50,712,926	54,042,992
One-to-four family residential \| Special mention/watch
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	1,041,019	1,412,334
One-to-four family residential \| Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	581,060	636,032
One-to-four family residential \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	0	0
Non-owner occupied one-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	3,013,417	3,116,832
Non-owner occupied one-to-four family residential \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	2,876,981	2,782,817
Non-owner occupied one-to-four family residential \| Special mention/watch
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	136,436	17,861
Non-owner occupied one-to-four family residential \| Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	0	316,154
Non-owner occupied one-to-four family residential \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	0	0
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	2,162,851	3,615,351
Commercial real estate \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	2,162,851	3,304,369
Commercial real estate \| Special mention/watch
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	0	36,178
Commercial real estate \| Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	0	274,804
Commercial real estate \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	0	0
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	6,801,419	6,145,488
Consumer \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	6,301,242	5,830,415
Consumer \| Special mention/watch
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	436,522	252,722
Consumer \| Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	63,655	62,351
Consumer \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	$ 0	$ 0

WCF Bancorp, Inc. 10-K