Note 12 - Subsequent Events	3 Months Ended
Mar. 31, 2024
Notes to Financial Statements
Subsequent Events [Text Block]	*Note 12.* Subsequent Events** Since March 31, 2024, the Company has issued 314,969 shares of common stock under the September 2021 ATM (see Note 1) for gross proceeds net of commissions totaling $0.4 million through the filing date of this Quarterly Report on Form 10-Q.

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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