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Summary of Significant Accounting Policies (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
store
Aug. 20, 2018
Dec. 31, 2019
USD ($)
store
Dec. 31, 2018
USD ($)
Jan. 01, 2019
USD ($)
Significant Accounting Policies [Line Items]          
Number of full-service banking offices | store 6   6    
Stock split description     the Company effected a 1-for-5.5 reverse stock split, whereby each 5.5 shares of the Company's common stock were reclassified into one share of common stock.    
Reverse stock split ratio   5.5      
Cash exceeded federally insured limits $ 41,600   $ 41,600    
Cash held, not federally insured 37,500   37,500    
Interest-bearing deposits in other financial institutions 100   100 $ 100  
Minimum balance of loans individually evaluated for impairment 250   250    
Balance outstanding in joint ventures 1,000   1,000 595  
Income recognized on joint ventures     $ 57 69  
Tax benefit greater than being realized on examination     50.00%    
FRB regulatory reserve requirement 5,164   $ 5,164 $ 3,502  
Investment 894        
Maximum exposure to loss related to investments 894        
Operating lease, right-of-use assets 1,780   1,780    
Operating lease, liabilities $ 1,960   $ 1,960    
ASU 2016-02 [Member]          
Significant Accounting Policies [Line Items]          
Operating lease, right-of-use assets         $ 2,400
Operating lease, liabilities         $ 2,400
Minimum [Member] | Buildings And Related Components [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful life     3 years    
Minimum [Member] | Furniture, fixtures and equipment [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful life     2 years    
Maximum [Member]          
Significant Accounting Policies [Line Items]          
Home equity lines of credit combined with the balance of the prior mortgage liens 89.90%   89.90%    
Maturity of cash, deposits with other financial institutions     90 days    
Maximum [Member] | Buildings And Related Components [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful life     40 years    
Maximum [Member] | Furniture, fixtures and equipment [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful life     25 years    
Single-Family Residential [Member] | Maximum [Member]          
Significant Accounting Policies [Line Items]          
Lending amount up to the percentage of collateral 80.00%   80.00%    
Multi-Family Residential [Member] | Minimum [Member]          
Significant Accounting Policies [Line Items]          
Fixed rates loans limit, period     3 years    
Multi-Family Residential [Member] | Maximum [Member]          
Significant Accounting Policies [Line Items]          
Lending amount up to the percentage of collateral 85.00%   85.00%    
Fixed rates loans limit, period     5 years    
Real Estate Commercial [Member] | Minimum [Member]          
Significant Accounting Policies [Line Items]          
Fixed rates loans limit, period     3 years    
Real Estate Commercial [Member] | Maximum [Member]          
Significant Accounting Policies [Line Items]          
Lending amount up to the percentage of collateral 85.00%   85.00%    
Fixed rates loans limit, period     5 years    
Construction [Member] | Maximum [Member]          
Significant Accounting Policies [Line Items]          
Lending amount up to the percentage of collateral 80.00%   80.00%    
Maturity of construction loans convert to permanent loans     30 years