Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Cash and Cash Equivalents

Cash and cash equivalents consist of the following:

	June 30, 2019		December 31, 2018
	(in thousands)
Cash	$	667	$	822
Cash equivalents:
Money market accounts		78,164		105,224
Total cash and cash equivalents	$	78,831	$	106,046

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 condensed consolidated balance sheets to the amounts shown in the condensed consolidated statements of cash flows.

	June 30, 2019		June 30, 2018
	(in thousands)
Cash and cash equivalents	$	78,831	$	125,425
Restricted cash included in other assets		300		300
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statement of cash flows	$	79,131	$	125,725

Summary of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following:

	June 30, 2019		December 31, 2018
	(in thousands)
Prepaid research and development project costs	$	1,545	$	762
Other receivables		1,457		751
Prepaid insurance		185		555
Income taxes receivable		115		163
Other		459		475
Total prepaid expenses and other current assets	$	3,761	$	2,706

Summary of Property and Equipment, Net

Property and equipment, net consists of the following:

	June 30, 2019			December 31, 2018
	(in thousands)
Software	$	332		$	325
Leasehold improvements		112			112
Computer equipment		89			89
Furniture and fixtures		3			3
Property and equipment, gross		536			529
Less: accumulated depreciation		(402	)		(361	)
Total property and equipment, net	$	134		$	168

Summary of Accrued and Other Liabilities

Accrued and other liabilities consist of the following:

	June 30, 2019		December 31, 2018
	(in thousands)
Accrued research and development costs	$	3,597	$	4,485
Accrued employee-related costs		1,955		3,223
Accrued professional fees		1,016		357
Operating lease liability		177		—
Accrued restructuring costs		30		33
Other		289		714
Total accrued and other liabilities	$	7,064	$	8,812