Commitments and Contingencies - Schedule of Right-of-use Assets and Lease Liability (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Commitments And Contingencies - Schedule Of Right-of-use Assets And Lease Liability
Right-of-use assets, net	$ 2,568
Current portion of lease liability	374
Lease liability, less current portion	2,194
Total lease liability	$ 2,568