Quarterly report pursuant to Section 13 or 15(d)

Corporate Information (Details)

v3.10.0.1
Corporate Information (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2014
Business Acquisition [Line Items]    
Cash, cash equivalents and investments $ 137.3  
Pieris Pharmaceuticals GmbH    
Business Acquisition [Line Items]    
Ownership interest acquired   100.00%