Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Summary of Future Minimum Payments Due Under Operating Leases

The following table summarizes the future minimum payments due under the operating leases as of December 31, 2017 (in thousands):

Year Ending December 31,
2018	$	820
2019		808
2020		499
2021		—
	$	2,127