Goodwill and Intangible Assets, Net - Acquisition-Related Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	$ 5,955
Intangible assets, accumulated amortization	(1,029)
Intangible assets, net carrying amount	4,926
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	4,955	$ 2,188
Intangible assets, accumulated amortization	(1,017)	(881)
Intangible assets, net carrying amount	3,938	$ 1,307
Technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	1,000
Intangible assets, accumulated amortization	(12)
Intangible assets, net carrying amount	$ 988