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Note 10 - Common Stock Warrants and Warrant Liabilities (Tables)

3 Months Ended

Mar. 31, 2026

Notes Tables

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

			July 2020 Warrants				TLF Warrants				November 2021 Warrants				September 2022 Warrants				November 2022 A-1 Warrants				December 2023 Warrants				June 2024 Warrants				July 2024 Series F-1 Warrants				October 2025 Pre-Funded Warrants*				January 2026 Pre- Funded Warrants				Total Warrants
December 31, 2025				784				3				2,832				332				454				5,341				4,511				2,900				1,081,082				-				1,098,239
Pre-Funded Warrants granted				-				-				-				-				-				-				-				-				-				167,539,227				167,539,227
Warrants exercised				-				-				-				-				-				(5,341	)			(4,511	)			-				-				-				(9,852	)
Warrants expired				(784	)			(3	)			-				-				-				-				-				-				-				-				(787	)
Warrants issued for 5:1 reverse stock split due to rounding feature				-				-				3				1				-				-				-				-				-				-				4
March 31, 2026				-				-				2,835				333				454				-				-				2,900				1,081,082				167,539,227				168,626,831
Weighted Average Price per share at March 31, 2026			expired				expired				$	557.65			$	1,102.50			$	1,102.50			expired				expired				$	3.30			$	0.002385			$	0.05			$	0.06
Expiration Date			expired				expired				September 11, 2028				September 11, 2028				November 20, 2028				expired				expired				July 30, 2029				Do not expire				Do not expire
*			exercisable for an aggregate of 22,664,040 shares of common stock

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Warrant liabilities as of December 31, 2025		$	639,071
Fair value of January 2026 Pre-Funded Warrants upon issuance			5,436,649
Decrease in fair value of warrant liabilities			(5,837,607	)
Reclassification of January 2026 Pre-Funded Warrant liabilities to equity during period			(204,398	)
Warrant liabilities as of March 31, 2026		$	33,715

X

- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

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