v3.19.1
Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Securities available-for-sale:    
Total securities available-for-sale $ 146,991 $ 129,689
Mortgage-backed securities    
Securities available-for-sale:    
Total securities available-for-sale 67,921 51,904
Collateralized mortgage obligations    
Securities available-for-sale:    
Total securities available-for-sale 55,649 50,485
Municipal bonds    
Securities available-for-sale:    
Total securities available-for-sale 789 2,375
Recurring    
Securities available-for-sale:    
Total securities available-for-sale 146,991 129,689
Total assets measured at fair value on a recurring basis 146,991 129,689
Total liabilities measured at fair value on a recurring basis 0 0
Recurring | Mortgage-backed securities    
Securities available-for-sale:    
Total securities available-for-sale 67,921 51,904
Recurring | Collateralized mortgage obligations    
Securities available-for-sale:    
Total securities available-for-sale 55,649 50,485
Recurring | SBA loan pool securities    
Securities available-for-sale:    
Total securities available-for-sale 22,632 24,925
Recurring | Municipal bonds    
Securities available-for-sale:    
Total securities available-for-sale 789 2,375
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Securities available-for-sale:    
Total securities available-for-sale 0 0
Total assets measured at fair value on a recurring basis 0 0
Total liabilities measured at fair value on a recurring basis 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities    
Securities available-for-sale:    
Total securities available-for-sale 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized mortgage obligations    
Securities available-for-sale:    
Total securities available-for-sale 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | SBA loan pool securities    
Securities available-for-sale:    
Total securities available-for-sale 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal bonds    
Securities available-for-sale:    
Total securities available-for-sale 0 0
Recurring | Significant Other Observable Inputs (Level 2)    
Securities available-for-sale:    
Total securities available-for-sale 146,991 129,689
Total assets measured at fair value on a recurring basis 146,991 129,689
Total liabilities measured at fair value on a recurring basis 0 0
Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities    
Securities available-for-sale:    
Total securities available-for-sale 67,921 51,904
Recurring | Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations    
Securities available-for-sale:    
Total securities available-for-sale 55,649 50,485
Recurring | Significant Other Observable Inputs (Level 2) | SBA loan pool securities    
Securities available-for-sale:    
Total securities available-for-sale 22,632 24,925
Recurring | Significant Other Observable Inputs (Level 2) | Municipal bonds    
Securities available-for-sale:    
Total securities available-for-sale 789 2,375
Recurring | Significant Unobservable Inputs (Level 3)    
Securities available-for-sale:    
Total securities available-for-sale 0 0
Total assets measured at fair value on a recurring basis 0 0
Total liabilities measured at fair value on a recurring basis 0 0
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities    
Securities available-for-sale:    
Total securities available-for-sale 0 0
Recurring | Significant Unobservable Inputs (Level 3) | Collateralized mortgage obligations    
Securities available-for-sale:    
Total securities available-for-sale 0 0
Recurring | Significant Unobservable Inputs (Level 3) | SBA loan pool securities    
Securities available-for-sale:    
Total securities available-for-sale 0 0
Recurring | Significant Unobservable Inputs (Level 3) | Municipal bonds    
Securities available-for-sale:    
Total securities available-for-sale $ 0 $ 0