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Note 10 - Related-party Transactions | 9 Months Ended
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Sep. 30, 2025
Notes to Financial Statements |
Related Party Transactions Disclosure [Text Block] | Note 10 — Related-Party Transactions Chief Executive Officer The Chief Executive Officer (“CEO”) has a partial interest in a company that the Company has entered into an agreement with as described below. Previously, the Company acquired DS-200 and all related intellectual property pursuant to an asset purchase agreement (the “Selenix Agreement”) dated June 23, 2017 between the Company and Selenix LLC (“Selenix”), an entity affiliated with the CEO. On August 30, 2024, the Company amended the Selenix Agreement in tandem with an agreement to sell DS-200 in August 2024 (see Note 12). Pursuant to the terms of the amended Selenix Agreement, Selenix waived its rights to future milestone payments and 50% of DS-200 profit in exchange for 45% of proceeds received by the Company from the DS-200 sale agreement. Selenix is 50% owned by Messa Holdings LLC (“Messa”), which is 100% owned by the CEO. In March 2025, the Company recognized licensing revenue of $1,500 and $675 in cost of sales from a development milestone. In June 2025, the Company paid $675 to Selenix.

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