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Summary of Significant Accounting Policies (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 01, 2018
Dec. 31, 2017
Dec. 31, 2016
Accounting Policies [Line Items]      
FHLB stock sold back at par value   $ 100  
Loans transfer to OREO   $ 0  
Real estate acquired through foreclosure   114 $ 114
Sale of OREO   $ 0 0
Federal Tax Rate 21.00% 34.00%  
Tax charge   $ 592  
Income tax expense   913 (83)
Advertising and marketing related expenses   $ 162 $ 78
Forecast      
Accounting Policies [Line Items]      
Federal Tax Rate 21.00%    
Maximum      
Accounting Policies [Line Items]      
Federal Tax Rate   35.00%  
Computer Software, Intangible Asset [Member] | Minimum      
Accounting Policies [Line Items]      
Intangible assets amortization period   3 years  
Computer Software, Intangible Asset [Member] | Maximum      
Accounting Policies [Line Items]      
Intangible assets amortization period   5 years