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Note 2 - Significant Accounting Policies - Antidilutive Securities (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Antidilutive securities (in shares)	17,832,323	17,107,636	17,832,323	17,107,636
Common Stock Warrants [Member]
Antidilutive securities (in shares)	2,000,000	2,000,000	2,000,000	2,000,000
Placement Agent Warrants [Member]
Antidilutive securities (in shares)	80,000	80,000	80,000	80,000
Series A Warrants [Member]
Antidilutive securities (in shares)	14,450,069	14,450,069	14,450,069	14,450,069
Unvested Common Stock Grants [Member]
Antidilutive securities (in shares)	1,302,254	577,567	1,302,254	577,567

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482662/260-10-50-1

+ Details

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