Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies

Schedule of future minimum lease payments

	Operating Leases
	(in thousands)
Year ending December 31:
2018	$	8,034
2019		8,547
2020		8,675
2021		8,913
2022		9,160
2023 and thereafter		14,737
Total future minimum lease payments	$	58,066