Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Schedule of Total Stock-Based Compensation Expense Related to Share-Based Awards under the Pieris Plan (Detail)

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Stock-based Compensation - Schedule of Total Stock-Based Compensation Expense Related to Share-Based Awards under the Pieris Plan (Detail) - Jun. 30, 2015 - USD ($)
Total
Total
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total stock-option expense $ 268,039 $ 485,375
Research and Development [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total stock-option expense 78,551 129,590
General and Administrative [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total stock-option expense $ 189,488 $ 355,785