Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Schedule of Cash as Reported in Condensed Consolidated Statements of Cash Flows

Cash as reported in these condensed consolidated statements of cash flows consists of the following (in thousands):

	June 30, 2019		December 31, 2018		June 30, 2018		December 31, 2017
Cash and cash equivalents	$	185,385	$	138,951	$	173,052	$	181,568
Restricted cash (SRX Cardio)		—		30		30		173
Restricted cash for royalty payments to HealthCare Royalty Partners and its affiliates ("HCR")		2,280		1,032		—		—
Total cash balance in condensed consolidated statements of cash flows	$	187,665	$	140,013	$	173,082	$	181,741