Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Schedule of Future Minimum Lease Payments, Under Non-Cancelable Operating Leases

Future minimum lease payments under non-cancelable operating leases are as follows at December 31, 2017:

Years Ending December 31,	(in thousands)
2018	$	4,444
2019		4,537
2020		4,632
2021		4,728
2022		3,485
Thereafter		5,450
	$	27,276