Loans and Allowance for Loan Losses - Schedule of Allowance for Loan Losses (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Year	$ 258,000	$ 263,000	$ 273,000	$ 263,000
Provision for Loan Losses
Loans Charged-Off			(16,000)	(1,000)
Recoveries of Loans Previously Charged-Off	2,000	1,000	3,000	2,000
Balance at End of Year	260,000	264,000	260,000	264,000
Ending Balance: Individually Evaluated for Impairment					$ 19,000
Ending Balance: Collectively Evaluated for Impairment	260,000		260,000		254,000
Ending Balance: Individually Evaluated for Impairment	120,000		120,000		101,000
Ending Balance: Collectively Evaluated for Impairment	56,123,000		56,123,000		52,123,000
Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Year			9,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment					9,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment
Commercial Business [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Year	3,000	2,000	3,000
Provision for Loan Losses		1,000
Loans Charged-Off
Recoveries of Loans Previously Charged-Off
Balance at End of Year	3,000	3,000	3,000	3,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment	3,000		3,000		3,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment	1,526,000		1,526,000		1,285,000
Commercial and Multi-Family Real Estate [Member] \| Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Year	40,000	39,000	38,000	37,000
Provision for Loan Losses	21,000	(1,000)	23,000	1,000
Loans Charged-Off
Recoveries of Loans Previously Charged-Off
Balance at End of Year	61,000	38,000	61,000	38,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment	61,000		61,000		38,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment	20,596,000		20,596,000		16,503,000
Residential Real Estate [Member] \| Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Year	200,000	190,000	220,000	181,000
Provision for Loan Losses	(18,000)	1,000	(23,000)	9,000
Loans Charged-Off			(16,000)
Recoveries of Loans Previously Charged-Off	2,000	1,000	3,000	2,000
Balance at End of Year	184,000	192,000	184,000	192,000
Ending Balance: Individually Evaluated for Impairment					19,000
Ending Balance: Collectively Evaluated for Impairment	184,000		184,000		201,000
Ending Balance: Individually Evaluated for Impairment	120,000		120,000		101,000
Ending Balance: Collectively Evaluated for Impairment	33,201,000		33,201,000		33,652,000
Consumer and Other [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Year	4,000	3,000	3,000	3,000
Provision for Loan Losses			1,000	1,000
Loans Charged-Off				(1,000)
Recoveries of Loans Previously Charged-Off
Balance at End of Year	4,000	3,000	4,000	3,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment	4,000		4,000		3,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment	800,000		800,000		$ 683,000
Unallocated [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Year	11,000	29,000	9,000	39,000
Provision for Loan Losses	(3,000)	(1,000)	(1,000)	(11,000)
Loans Charged-Off
Recoveries of Loans Previously Charged-Off
Balance at End of Year	8,000	$ 28,000	8,000	28,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment	8,000		8,000
Ending Balance: Individually Evaluated for Impairment
Ending Balance: Collectively Evaluated for Impairment
Commercial Business [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Year				3,000
Provision for Loan Losses
Loans Charged-Off
Recoveries of Loans Previously Charged-Off

Central Federal Bancshares, Inc 10-Q/A