Post-effective amendment to a registration statement that is not immediately effective upon filing

Summary of Significant Accounting Policies - Schedule of Total Stock-Based Compensation Expense Related to Share-Based Awards Under the Pieris Plan (Detail)

v3.3.1.900
Summary of Significant Accounting Policies - Schedule of Total Stock-Based Compensation Expense Related to Share-Based Awards Under the Pieris Plan (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total stock-option expense $ 1,164,633 $ 571,382
Research and Development [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total stock-option expense 379,066 7,623
General and Administrative [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total stock-option expense $ 785,567 $ 563,759