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Note 2 - Significant Accounting Policies - Antidilutive Securities (Details) - shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Antidilutive securities (in shares)	17,098,388	387,980
Common Stock Warrants [Member]
Antidilutive securities (in shares)	2,000,000	0
Placement Agent Warrants [Member]
Antidilutive securities (in shares)	80,000	0
Series A Warrants [Member]
Antidilutive securities (in shares)	14,450,069	0
Unvested Common Stock Grants [Member]
Antidilutive securities (in shares)	568,319	387,980

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

+ Details

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