Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Reconciliation of Cash, Cash Equivalents, and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash within the statement of financial position that sum to the total of the same such amounts shown in the statement of cash flows.

	June 30,
	2018		2017
	(in thousands)
Cash and cash equivalents	$	40,404	$	97,194
Restricted cash included in prepaid expenses and other current assets		389		—
Restricted cash included in other non-current assets		—		388
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows	$	40,793	$	97,582