Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property Plant And Equipment [Abstract]

Schedule of Property and Equipment, Net

Property and equipment, net consists of the following:

	December 31,
	2018			2017
	(in thousands)
Laboratory equipment	$	9,309		$	3,714
Computers and purchased software		248			253
Furniture and fixtures		1,066			51
Leasehold improvements		24,520			34
Assets not yet in service		2,602			—
Property and equipment, at cost		37,745			4,052
Less accumulated depreciation and amortization		(2,108	)		(898	)
Property and equipment—net	$	35,637		$	3,154