Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Schedule of Remaining Aggregate Annual Commitments Pursuant to Office Lease and Lease Amendment

As of December 31, 2017, the remaining aggregate annual commitments pursuant to the Office Lease and the Lease Amendment are as follows:

Year	(in thousands)
2018	$	411
2019		421
2020		430
2021		439
2022		445
Thereafter		74
Total	$	2,220