Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Future Operating Lease Commitments

Future operating lease commitments are as follows by calendar year (in thousands):

	March 31, 2018
Remainder of 2018	$	891
2019		1,132
2020		531
2021		16
Total commitments	$	2,570