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Fair Value Measurement - Schedule of Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Available-for-sale securities	$ 10,990	$ 11,437
Collateralized Mortgage Obligations [Member]
Available-for-sale securities	8,121	8,466
SBA Pools Securities [Member]
Available-for-sale securities	2,869	2,971
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Available-for-sale securities	10,990	11,437
Fair Value, Measurements, Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Available-for-sale securities
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Available-for-sale securities	10,990	11,437
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Available-for-sale securities
Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Available-for-sale securities
Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Significant Other Observable Inputs (Level 2) [Member]
Available-for-sale securities	8,121	8,466
Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Significant Unobservable Inputs (Level 3) [Member]
Available-for-sale securities
Fair Value, Measurements, Recurring [Member] | SBA Pools Securities [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Available-for-sale securities
Fair Value, Measurements, Recurring [Member] | SBA Pools Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Available-for-sale securities	2,869	2,971
Fair Value, Measurements, Recurring [Member] | SBA Pools Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Available-for-sale securities
Fair Value, Measurements, Recurring [Member] | Fair Value [Member]
Available-for-sale securities	10,990	11,437
Fair Value, Measurements, Recurring [Member] | Fair Value [Member] | Collateralized Mortgage Obligations [Member]
Available-for-sale securities	8,121	8,466
Fair Value, Measurements, Recurring [Member] | Fair Value [Member] | SBA Pools Securities [Member]
Available-for-sale securities	$ 2,869	$ 2,971

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

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