License and Transfer Agreement with Enumeral Biomedical Corporation	9 Months Ended
Sep. 30, 2017
Accounting Changes and Error Corrections [Abstract]
License and Transfer Agreement with Enumeral Biomedical Corporation	11. License and Transfer Agreement with Enumeral Biomedical Corporation On April 18, 2016, the Company entered into a license and transfer agreement (the “Original Agreement”) with Enumeral Biomedical Holdings, Inc. (“Enumeral”), pursuant to which the Company acquired a non-exclusive worldwide license to use specified patent rights and know-how owned by Enumeral to research, develop and market fusion protein. As contemplated by the terms of the Original Agreement, the Company entered into a definitive license and transfer agreement (the “Definitive Agreement”) with Enumeral on June 6, 2016, to expand the scope of the Company´s option to license additional antibodies from Enumeral. Under the Definitive Agreement, Enumeral has granted Pieris options to license two additional undisclosed Enumeral antibodies (each, a “Subsequent Option”). The Subsequent Options expired, unexercised, on May 31, 2017. Under the terms of the Original Agreement, the Company agreed to pay Enumeral an upfront license fee of $250,000 upon signing in April 2016 and subsequently elected to pay a $750,000 maintenance fee in May 2016. All amounts paid related to the Agreement have been expensed as research and development expense as incurred. The Company incurred zero and $1.0 million in upfront fees for the three and nine months ended September 30, 2016. No amounts were incurred for the three and nine-month period end September 30, 2017.

11. License and Transfer Agreement with Enumeral Biomedical Corporation

On April 18, 2016, the Company entered into a license and transfer agreement (the “Original Agreement”) with Enumeral Biomedical Holdings, Inc. (“Enumeral”), pursuant to which the Company acquired a non-exclusive worldwide license to use specified patent rights and know-how owned by Enumeral to research, develop and market fusion protein. As contemplated by the terms of the Original Agreement, the Company entered into a definitive license and transfer agreement (the “Definitive Agreement”) with Enumeral on June 6, 2016, to expand the scope of the Company´s option to license additional antibodies from Enumeral. Under the Definitive Agreement, Enumeral has granted Pieris options to license two additional undisclosed Enumeral antibodies (each, a “Subsequent Option”). The Subsequent Options expired, unexercised, on May 31, 2017.

Under the terms of the Original Agreement, the Company agreed to pay Enumeral an upfront license fee of $250,000 upon signing in April 2016 and subsequently elected to pay a $750,000 maintenance fee in May 2016. All amounts paid related to the Agreement have been expensed as research and development expense as incurred. The Company incurred zero and $1.0 million in upfront fees for the three and nine months ended September 30, 2016. No amounts were incurred for the three and nine-month period end September 30, 2017.