Business Combination - Schedule of Fair Values of Assets Acquired and Liabilities Assumed at Acquisition Date (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Aug. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 3,631	$ 3,631
Cardiogen Sciences, Inc.
Business Acquisition [Line Items]
In process research and development			$ 8,000
Deferred tax liability			(3,260)
Goodwill			3,631
Liabilities assumed (net of cash acquired)			(82)
Total consideration paid to the fair values of the assets acquired and liabilities assumed			$ 8,289