Note 3 - Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

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

	As of September 30, 2023
	Adjusted		Unrealized		Unrealized		Market
	Cost		Gains		Losses		Value
Level 1:
Certificate of Deposits		10,000		-		-		10,000
Total Financial Assets	$	10,000	$	-	$	-	$	10,000

	As of December 31, 2022
	Adjusted		Unrealized		Unrealized		Market
	Cost		Gains		Losses		Value
Level 1:
U.S. Treasury securities in short-term investments		9,849		100		-		9,949
Certificate of Deposits		4,000		-		-		4,000
Total Financial Assets	$	13,849	$	100	$	-	$	13,949

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

Level 3:	September 30, 2023		December 31, 2022
Fair value at inception or the beginning of the period	$	7,717		-
Change in fair value of warrant liabilities		117		-
Fair value as of September 30, 2023	$	7,834		-

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

	As of September 30, 2023			As of December 31, 2022
Expected stock price volatility		100	%		-	%
Risk-free interest rate		4.49	%		-	%
Dividends yield		0	%		-	%
Expected life of warrants		4.75			-
Exercise price	$	1.45		$	-