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

9 Months Ended

Sep. 30, 2023

Notes Tables

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, 2023:	$	1	$	—	$	—	$	1
Fair value of warrant liability as of December 31, 2022:	$	77	$	—	$	—	$	77

Three Months Ended September 30, 2023	Warrant Liability Long-Term
Balance, June 30, 2023	$	2
Change in fair value - net		(1	)
Balance, September 30, 2023	$	1

Nine Months Ended September 30, 2023	Warrant Liability Long-Term
Balance, December 31, 2022	$	77
Change in fair value - net		(76	)
Balance, September 30, 2023	$	1