Note 6 - Collaborative Agreements

12 Months Ended

Dec. 31, 2023

Notes to Financial Statements

Collaborative Arrangement Disclosure [Text Block]

(6) Collaborative Agreements

We have entered into various biotherapeutic delivery partnering collaborations related to preclinical and clinical development. These agreements provide support to partners and utilize our enabling biotherapeutic delivery systems, including training and support during clinical and preclinical delivery of biotherapeutics. Under the terms of these agreements, we typically receive fees for services and products, milestone payments, and participation in future therapeutic revenues. We gain access to certain data generated by our partners for use in our own product development efforts and also receive patent rights to biotherapeutic delivery inventions. Revenue from collaborative agreements is recognized in the consolidated statements of operations in the line “Collaboration agreement revenue.”