Property and equipment, net (Tables)

9 Months Ended

Sep. 30, 2017

Property Plant And Equipment [Abstract]

Summary of Property and Equipment Net

Property and equipment, net, consists of the following (in thousands):

	As of			As of
	September 30, 2017			December 31, 2016
Building	$	161,817		$	—
Computer equipment and software		5,065			1,655
Office equipment		4,196			1,427
Laboratory equipment		23,191			16,305
Leasehold improvements		116			13,697
Construction-in-progress		1,212			136,315
Total property and equipment, gross		195,597			169,399
Less accumulated depreciation and amortization		(13,239	)		(12,444	)
Total property and equipment, net	$	182,358		$	156,955