v3.19.1
Loans and Allowance for Loan Losses - Aging of Past Due Accruing Loans and Nonaccrual Loans by Portfolio Segment (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual $ 1,061,000 $ 3,234,000
Total Past Due and Nonaccrual 1,438,000 4,575,000
Loans guaranteed by US government agency    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual 0 831,000
30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 368,000 1,213,000
60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 9,000 128,000
90 or More Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 0 0
Real Estate | Commercial property    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual   318,000
Total Past Due and Nonaccrual   318,000
Real Estate | Commercial property | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing   0
Real Estate | Commercial property | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing   0
Real Estate | Commercial property | 90 or More Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing   0
Real Estate | Residential property    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual 302,000 730,000
Total Past Due and Nonaccrual 397,000 1,775,000
Real Estate | Residential property | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 95,000 949,000
Real Estate | Residential property | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 0 96,000
Real Estate | Residential property | 90 or More Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 0 0
Real Estate | SBA loan pool securities    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual 540,000 1,810,000
Total Past Due and Nonaccrual 723,000 1,810,000
Real Estate | SBA loan pool securities | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 183,000 0
Real Estate | SBA loan pool securities | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 0 0
Real Estate | SBA loan pool securities | 90 or More Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 0 0
Commercial and Industrial | Commercial term    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual   4,000
Total Past Due and Nonaccrual   4,000
Commercial and Industrial | Commercial term | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing   0
Commercial and Industrial | Commercial term | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing   0
Commercial and Industrial | Commercial term | 90 or More Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing   0
Commercial and Industrial | Commercial lines of credit    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual   10,000
Total Past Due and Nonaccrual   10,000
Commercial and Industrial | Commercial lines of credit | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing   0
Commercial and Industrial | Commercial lines of credit | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing   0
Commercial and Industrial | Commercial lines of credit | 90 or More Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing   0
Commercial and Industrial | SBA commercial term    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual 203,000 338,000
Total Past Due and Nonaccrual 203,000 340,000
Commercial and Industrial | SBA commercial term | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 0 2,000
Commercial and Industrial | SBA commercial term | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 0 0
Commercial and Industrial | SBA commercial term | 90 or More Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 0 0
Consumer    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual 16,000 24,000
Total Past Due and Nonaccrual 115,000 318,000
Consumer | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 90,000 262,000
Consumer | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing 9,000 32,000
Consumer | 90 or More Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans, Still accruing $ 0 $ 0