Balance Sheet Components

9 Months Ended

Sep. 30, 2019

Balance Sheet Related Disclosures [Abstract]

Balance Sheet Components

4. Balance Sheet Components

Property and Equipment, net

Property and equipment, net, consists of the following:

	September 30,			December 31,
	2019			2018
	(in thousands)
Computer hardware and software	$	2,713		$	2,148
Furniture and equipment		1,827			1,002
Leasehold improvements		8,659			4,709
		13,199			7,859
Less: Accumulated depreciation		(3,834	)		(2,216	)
	$	9,365		$	5,643

Depreciation expense for the three months ended September 30, 2019 and 2018 was $0.7 million and $0.3 million, respectively. Depreciation expense for the nine months ended September 30, 2019 and 2018 was $1.6 million and $0.8 million, respectively.

The useful life for computer hardware and software is three years, furniture and equipment is five years and leasehold improvements is the lesser of the useful life or the term of the respective lease.

Accrued Expenses

Accrued expenses consist of the following:

	September 30,		December 31,
	2019		2018
	(in thousands)
Development costs	$	42,736	$	21,216
Employee-related expenses		17,391		19,638
Professional services		17,109		10,903
Other accrued expenses		891		237
	$	78,127	$	51,994