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

9 Months Ended

Sep. 30, 2022

Notes Tables

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

		*September 30, 2022*				*December 31, 2021*
Prepaid sponsored research		$	1,346			$	474
Prepaid insurance			938				589
Vendor prepayments and deposits			807				486
Non-trade receivables			6				23
Related party receivables			4				22
Total prepaid expenses and other current assets		$	3,101			$	1,594

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 September 30, 2022:		$	228			$	—			$	—			$	228
Fair value of warrant liability as of December 31, 2021:		$	1,412			$	—			$	—			$	1,412

Three Months Ended September 30, 2022		*Warrant Liability Long-Term*				*Warrant Liability Total*
Balance, June 30, 2022		$	649			$	649
Change in fair value - net			(421	)			(421	)
Balance, September 30, 2022		$	228			$	228

Nine Months Ended September 30, 2022		*Warrant Liability Long-Term*				*Warrant Liability Total*
Balance, December 31, 2021		$	1,412			$	1,412
Change in fair value - net			(1,184	)			(1,184	)
Balance, September 30, 2022		$	228			$	228

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

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