Pieris Pharmaceuticals, Inc. Annual report pursuant to Section 13 and 15(d)

Note 3 - Revenue - Potential Milestone Payments Received (Details) - Collaborative Arrangement [Member] - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Research And Development Milestone Payments [Member]
milestone	$ 951
Research And Development Milestone Payments [Member] \| Pfizer [Member]
milestone	759
Research And Development Milestone Payments [Member] \| Servier Developed Collaboration Products [Member]
milestone	107
Research And Development Milestone Payments [Member] \| Boston Pharmaceuticals [Member]
milestone	$ 85
Sales Milestone Payments [Member]
milestone		$ 814
Sales Milestone Payments [Member] \| Pfizer [Member]
milestone		450
Sales Milestone Payments [Member] \| Servier Developed Collaboration Products [Member]
milestone		99
Sales Milestone Payments [Member] \| Boston Pharmaceuticals [Member]
milestone		$ 265