Note 7 - Research Grants and Agreements	12 Months Ended
Dec. 31, 2023
Notes to Financial Statements
Research, Development, and Computer Software Disclosure [Text Block]	7. Research Grants and Agreements *Sponsored Research Agreement* The Company entered into a SRA with ODURF during 2014 pursuant to which the Company sponsors research activities performed by ODURF’s Frank Reidy Center. 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 for research in the amount of $0.3 million and in May 2021 sponsored an additional task order for $0.3 million each to be performed during their respective subsequent 12-month periods. These sponsored researches are funded through monthly payments 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 within the budget as needed with our approval so long as the obligations of ODURF under the task order and statement of work remain unchanged and unimpaired. During the years ended December 31, 2023 and 2022, the Company incurred costs relating to the SRA equal to zero and $0.2 million, respectively. As of December 31, 2023, there are no unbilled SRAs left under the task orders.

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

Name:	us-gaap_ResearchDevelopmentAndComputerSoftwareDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration