Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Leases [Abstract]
Lease expiration period start	2019
Lease expiration period end	2024
Operating lease expense	$ 1,143	$ 800
Option to extend	true
Operating lease, not yet commenced, description	As of March 31, 2019, we do not have any leases that have not yet commenced that create significant rights and obligations.