Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Annual Obligations Under All Non-Cancellable Operating Lease Commitments

Future minimum annual obligations under all non-cancellable operating lease commitments at December 31, 2017 are as follows (in thousands):

	Total		2018		2019		2020		2021		2022		Thereafter
Operating lease obligations	$	2,584	$	1,073	$	469	$	387	$	434	$	221	$	—

Summaries of Purchase Obligations

The following table summarizes our purchase obligations at December 31, 2017 (in thousands):

	Payments Due by Period
	Total		Less Than 1 Year		2-3 Years		3-5 Years		More Than 5 Years
Purchase obligation	$	431	$	431	$	—	$	—	$	—