Deferred Revenue - Schedule of Deferred Revenue by Revenue Classification (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current deferred revenue
Total current deferred revenue	$ 61,194	$ 12,695
Non-current deferred revenue
Total non-current deferred revenue	240,919	704
Total current and non-current deferred revenue	302,113	13,399
Sequencing Revenue
Current deferred revenue
Total current deferred revenue	14,616	11,238
Non-current deferred revenue
Total non-current deferred revenue	493	516
Development Revenue
Current deferred revenue
Total current deferred revenue	46,578	1,457
Non-current deferred revenue
Total non-current deferred revenue	$ 240,426	$ 188