Note 4 - Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

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

	As of December 31, 2023
	Adjusted		Unrealized		Unrealized		Market
	Cost		Gains		Losses		Value
Level 1:
Money Market Funds	$	1,793	$	-	$	-	$	1,793
Certificate of Deposits		7,500		-		-		7,500
Total Financial Assets	$	9,293	$	-	$	-	$	9,293

	As of December 31, 2022
	Adjusted		Unrealized		Unrealized		Market
	Cost		Gains		Losses		Value
Level 1:
Money Market Funds	$	3,004	$	-	$	-	$	3,004
U.S. Treasury securities in short-term investments		9,849		100		-		9,949
Certificate of Deposits		4,000		-		-		4,000
Total Financial Assets	$	16,853	$	100	$	-	$	16,953

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

Level 3:	December 31, 2023
Fair value at inception or the beginning of the period	$	(7,717	)
Change in fair value of warrant liabilities		(11,986	)
Fair value as of December 31, 2023	$	(19,703	)

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	As of December 31, 2023
Expected stock price volatility		143	%
Risk-free interest rate		3.85	%
Dividends yield		0	%
Expected life of warrants (years)		4.50
Exercise price	$	1.45