Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail)

v3.3.0.814
Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail)
shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
USD ($)
shares
Sep. 30, 2015
USD ($)
Segment
shares
Dec. 31, 2014
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Number of Operating segment | Segment   1  
Milestones arrangement, categories description   Pieris aggregates milestones into three categories (i) research milestones, (ii) development milestones and (iii) commercial milestones.  
Stock Compensation Plan [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Antidilutive securities excluded from computation of earnings per share amount | shares 1.2 0.9  
Fair Value, Inputs, Level 1 [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Cash and Cash Equivalents, Fair Value $ 78,459 $ 78,459 $ 4,800,573