Note 2 - Basis of Presentation, Principles of Consolidation and Significant Accounting Policies and Liquidity (Tables)

6 Months Ended

Jun. 30, 2026

Notes Tables

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]

	*June 30, 2026*		*December 31, 2025*
Prepaid insurance	$	1,035	$	512
Vendor prepayments and deposits		388		278
Prepaid sponsored research		34		11
Non-trade receivables		4		7
Total prepaid expenses and other current assets	$	1,461	$	808

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

Description	*Fair Value*		*Level 1*		*Level 2*		*Level 3*
Fair value of warrant liability as of June 30, 2026:	$	40	$	—	$	—	$	40
Fair value of warrant liability as of December 31, 2025:	$	44	$	—	$	—	$	44

Three Months Ended June 30, 2026	*Warrant Liability Long-Term*
Balance, March 31, 2026	$	33
Change in fair value - net		7
Balance, June 30, 2026	$	40

Six Months Ended June 30, 2026	*Warrant Liability Long-Term*
Balance, December 31, 2025	$	44
Warrants issued		23,435
Warrants exercised		(1	)
Warrants reclassification		(12,675	)
Change in fair value - net		(10,763	)
Balance, June 30, 2026	$	40

Accounting Standards Update and Change in Accounting Principle [Table Text Block]

	*Three Months Ended*									*Six Months Ended*
	*June 30, 2025*									*June 30, 2025*
	*As Reported*			*As Adjusted*			*Effect of*			*As Reported*			*As Adjusted*			*Effect of*
	*Under Old Policy*			*Under New Policy*			*Change*			*Under Old Policy*			*Under New Policy*			*Change*
Condensed Consolidated Statement of Operations
Gain (loss) from change in fair value of warrant liability	$	9,609		$	(560	)	$	(10,169	)	$	18,663		$	(560	)	$	(19,223	)
Transaction costs allocated to warrant liabilities		(1,207	)		(1,207	)		—			(2,995	)		(1,207	)		1,788
Loss on issuance of warrant liabilities		(10,352	)		(10,352	)		—			(18,150	)		(10,352	)		7,798
Net loss		(7,640	)		(17,809	)		(10,169	)		(14,076	)		(23,713	)		(9,637	)
Net loss per common share - basic and diluted		(12.30	)		(28.68	)		(16.38	)		(28.26	)		(47.61	)		(19.35	)
Other comprehensive income (loss)		(7,640	)		(17,809	)		(10,169	)		(14,073	)		(23,710	)		(9,637	)

- Definition

Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

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