Note 7 - Net Loss Per Share - Schedule of Antidilutive Securities (Details) - shares	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Share-Based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)	0	250
Convertible Series F Preferred Stock [Member]
Antidilutive securities (in shares)	44,747	50,222
Series F Preferred Warrants [Member]
Antidilutive securities (in shares)	8,097,347	2,784,922
Common Stock Warrants [Member]
Antidilutive securities (in shares)	2,808,728	2,345,603

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