Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Tables

Future minimum annual capital and operating lease payments

Future minimum rental commitments under operating leases for years ending December 31, are as follows (in thousands):

		Operating
Years Ended December 31,		leases
2018	$	625
2019		652
2020		666
2021		676
2022		696
Thereafter		175
Total minimum lease payments	$	3,490