Balance Sheet Components

3 Months Ended

Mar. 31, 2018

Balance Sheet Related Disclosures [Abstract]

Balance Sheet Components

5. Balance Sheet Components

Property and Equipment

Property and equipment consist of the following (in thousands):

	March 31, 2018			December 31, 2017
Scientific equipment	$	7,102		$	5,935
Furniture and equipment		1,071			1,064
Capitalized software		278			278
Leasehold improvements		340			331
Total		8,791			7,608
Less: Accumulated depreciation		(4,761	)		(4,461	)
Property and equipment, net	$	4,030		$	3,147

Depreciation expense was $0.3 million and $0.3 million for the three months ended March 31, 2018 and 2017, respectively.

Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	March 31, 2018		December 31, 2017
Clinical research and development	$	6,967	$	5,981
Payroll related liabilities		2,817		4,412
Other		844		1,246
Total accrued liabilities	$	10,628	$	11,639