General form of registration statement for all companies including face-amount certificate companies

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

v2.4.1.9
Stock-Based Compensation - Schedule of Total Stock-Based Compensation Expense Related to Share-Based Awards under the Pieris Plan (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]  
Total stock-option expense $ 571,382us-gaap_AllocatedShareBasedCompensationExpense
Research and Development [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]  
Total stock-option expense 7,623us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
General and Administrative [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]  
Total stock-option expense $ 563,759us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember