Commitments and Contingencies - Schedule of Future Minimum Payments under Non-Cancellable Operating and Capital Lease Agreements and Other Non-Cancellable Agreements (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Operating Leases
2018	$ 4,439
2019	4,227
2020	3,493
2021	3,564
2022	3,662
Thereafter	307
Total Minimum Lease Payments	19,692
Capital Leases
2018	22
2019	20
2020	7
Total Minimum Lease Payments	49
Less amounts representing interest	(2)
Present value of capital lease obligations	47
Less: Current portion	(21)	$ (43)
Capital leases, net of current portion	26	$ 51
Other Obligations
2018	1,107
2019	827
2020	349
Total Minimum Lease Payments	$ 2,283