Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Cash and Cash Equivalents

Cash and cash equivalents consist of the following:

	June 30, 2016		December 31, 2015
	(in thousands)
Cash	$	2,210	$	1,576
Cash equivalents:
Money market accounts		128,340		148,604
Total cash and cash equivalents	$	130,550	$	150,180

Summary of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following:

	June 30, 2016		December 31, 2015
	(in thousands)
Prepaid research and development project costs	$	33	$	878
Prepaid insurance		84		480
Other receivables		154		44
Other		272		271
Total prepaid expenses and other current assets	$	543	$	1,673

Summary of Property and Equipment, Net

Property and equipment, net consists of the following:

	June 30, 2016			December 31, 2015
	(in thousands)
Computer equipment	$	258		$	242
Software		150			126
Lab equipment		—			236
Leasehold improvements		110			79
Furniture and fixtures		47			5
Property and equipment, gross		565			688
Less: accumulated depreciation		(164	)		(122	)
Total property and equipment, net	$	401		$	566

Summary of Accrued Liabilities

Accrued liabilities consist of the following:

	June 30, 2016		December 31, 2015
	(in thousands)
Accrued research and development costs	$	2,147	$	4,318
Accrued restructuring costs (note 12)		2,150		—
Accrued employee-related costs		1,448		1,529
Accrued professional fees		227		933
Other		218		236
Total accrued liabilities	$	6,190	$	7,016