Note 12 - Subsequent Events	9 Months Ended
Sep. 30, 2024
Notes to Financial Statements
Subsequent Events [Text Block]	*Note 12.* Subsequent Events** On October 8, 2024, the Company provided notice to the sales agents to terminate the September 2021 ATM, effective October 18, 2024. The Company will not incur any termination penalties as a result of the termination of the September 2021 ATM. Following such termination, the Company may not offer or sell any additional shares of its common stock under the September 2021 ATM or the related prospectus and prospectus supplement. From September 15, 2021 to October 18, 2024, the Company sold 17,501,561 shares of common stock for aggregate gross proceeds of approximately $28.6 million pursuant to the September 2021 ATM.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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