Commitments and Contingencies - Schedule of Lease Costs and Weighted-Average Assumptions Used in Determining its Lease Assets and Lease Liabilities (Details) $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Operating lease cost	$ 164
Cash paid for operating leases	165
Lease assets obtained in exchange for operating lease liabilities	$ 839
Weighted average remaining term for operating leases	1 year 1 month 9 days
Weighted average discount rate for operating leases	6.00%

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 55
-Paragraph 53
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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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-Publisher FASB
-Name Accounting Standards Codification
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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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-Publisher FASB
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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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