Note 7 - Stockholders' Equity - Antidilutive Securities (Details) - shares	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Antidilutive securities (in shares)	18,151,156	4,206,312
Convertible Debt Securities [Member]
Antidilutive securities (in shares)	16,906,190	2,946,525
Warrant [Member]
Antidilutive securities (in shares)	1,238,869	1,253,387
Share-Based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)	6,097	6,400

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.

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

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration