Note 2 - Summary of Significant Accounting Policies - Potentially Dilutive Securities (Details) - shares	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025
Common Stock equivalents (in shares)	489,884	849,892
Share-Based Payment Arrangement, Option [Member]
Common Stock equivalents (in shares)	42,211	104,191
Common Stock Warrants [Member]
Common Stock equivalents (in shares)	447,673	745,701

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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration