Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accrued Liabilities.
Accrued payroll and related employee costs	$ 4,013	$ 7,035
Accrued taxes	1,303	1,554
Accrued professional fees	712	1,382
Lease-related accruals	353	353
Other	1,612	2,944
Accrued liabilities	$ 7,993	$ 13,268