Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2017

Balance Sheet Related Disclosures [Abstract]

Summary of Property and Equipment, Net

Property and equipment, net consists of the following:

	December 31,
	2017			2016
	(in thousands)
Computer hardware and software	$	1,090		$	708
Furniture and equipment		1,029			695
Leasehold improvements		2,967			527
		5,086			1,930
Less: Accumulated depreciation		(1,073	)		(542	)
	$	4,013		$	1,388

Summary of Accrued Expenses

Accrued expenses consist of the following:

	December 31,
	2017		2016
	(in thousands)
Development costs	$	23,473	$	14,541
Employee-related expenses		15,838		5,948
Professional services		3,166		1,751
Other accrued expenses		124		112
	$	42,601	$	22,352