Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Cash and Cash Equivalents

Cash and cash equivalents consist of the following:

	December 31,
	2018		2017
	(in thousands)
Cash	$	822	$	556
Cash equivalents:
Money market accounts		105,224		99,792
Total cash and cash equivalents	$	106,046	$	100,348

Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported in the consolidated balance sheets to the amounts shown in the consolidated statements of cash flows.

	December 31, 2018		December 31, 2017
	(in thousands)
Cash and cash equivalents	$	106,046	$	100,348
Restricted cash included in other assets		300		188
Total cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows	$	106,346	$	100,536

Summary of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following:

	December 31,
	2018		2017
	(in thousands)
Prepaid research and development project costs	$	762	$	549
Other receivables		751		103
Prepaid insurance		555		478
Income taxes receivable		163		—
Other		475		247
Total prepaid expenses and other current assets	$	2,706	$	1,377

Summary of Property and Equipment, Net

Property and equipment, net consists of the following:

	December 31,
	2018			2017
	(in thousands)
Software	$	325		$	254
Leasehold improvements		112			79
Computer equipment		89			93
Furniture and fixtures		3			3
Property and equipment, gross		529			429
Less: accumulated depreciation		(361	)		(275	)
Total property and equipment, net	$	168		$	154

Summary of Accrued Liabilities

Accrued liabilities consist of the following:

	December 31,
	2018		2017
	(in thousands)
Accrued research and development costs	$	4,485	$	2,763
Accrued employee related costs		3,223		2,699
Accrued professional fees		357		317
Accrued restructuring costs (Note 11)		33		137
Other		714		217
Total accrued liabilities	$	8,812	$	6,133