Fair Value Measurement - Schedule of Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Available-for-sale securities	$ 19,161	$ 20,222
Collateralized Mortgage Obligations [Member]
Available-for-sale securities	9,265	9,752
SBA Pool Securities [Member]
Available-for-sale securities	9,896	10,470
Significant Other Observable Inputs (Level 2) [Member]
Available-for-sale securities	19,161	20,222
Fair Value [Member] | Fair Value, Measurements, Recurring [Member]
Available-for-sale securities	19,161	20,222
Fair Value [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Available-for-sale securities	9,265	9,752
Fair Value [Member] | Fair Value, Measurements, Recurring [Member] | SBA Pool Securities [Member]
Available-for-sale securities	9,896	10,470
Fair Value [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Available-for-sale securities
Fair Value [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Available-for-sale securities
Fair Value [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | SBA Pool Securities [Member]
Available-for-sale securities
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Available-for-sale securities	19,161	20,222
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Available-for-sale securities	9,265	9,752
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | SBA Pool Securities [Member]
Available-for-sale securities	9,896	10,470
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Available-for-sale securities
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Available-for-sale securities
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | SBA Pool Securities [Member]
Available-for-sale securities