Note 7 - Research Grants and Agreements	3 Months Ended
Mar. 31, 2023
Notes to Financial Statements
Research, Development, and Computer Software Disclosure [Text Block]	7. Research Grants and Agreements *Sponsored Research Agreement* The Company may sponsor research activities (“SRAs”) performed by ODURF. ODURF is compensated by the Company for its conduct of each study in accordance with the budget and payment terms set forth in the applicable task order. In March 2021, the Company agreed to sponsor a task order in the amount of $0.3 million for research performed during the subsequent 12-month period to be funded through monthly payments to ODURF. In May 2021, the Company agreed to sponsor an additional task order in the amount of $0.3 million for research performed during the subsequent 12-month period. These SRAs are funded through monthly payments to ODURF. Payments will be made upon ODURF certifying, to the Company’s reasonable satisfaction, that ODURF has met its obligations pursuant to the specified task order and statement of work. The principal investigator may transfer funds with the budget as needed without the Company’s approval so long as the obligations of ODURF under the task order and statement of work remain unchanged and unimpaired. During the three-month periods ended March 31, 2023 and 2022, the Company incurred costs relating to the SRAs equal to zero and $0.1 million, respectively. As of March 31, 2023, the Company does not have any active SRAs with ODURF.

The entire disclosure for research, development, and computer software activities, including contracts and arrangements to be performed for others and with federal government. Includes costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility and in-process research and development acquired in a business combination consummated during the period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 730
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483041/730-20-50-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 985
-SubTopic 730
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//985-730/tableOfContent

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