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Note 2 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		Fair Value Measured as of June 30, 2025 Using:
		Adjusted Cost				Unrealized Gains				Fair Value				Cash and Cash Equivalent				Marketable Securities
Assets
Level 1
Money market funds		$	1,085			$	—			$	1,085			$	1,085			$	—
Level 2
Asset-backed securities			904				—				904				—			$	904
Corporate bonds			10,049				—				10,049				—				10,049
Commercial paper			3,396				—				3,396				—				3,396
U.S. Government securities			2,487				—				2,487				—				2,487
Total financial assets		$	17,921				—			$	17,921			$	1,085			$	16,836
Liabilities
Level 2
Private placement warrant liability		$	—			$	—			$	—			$	—			$	—
Level 3
Convertible note, current			—				—				1,997				—				—
Derivative warrant liabilities			—				—				788				—				—
Total financial liabilities		$	—			$	—			$	2,785			$	—			$	—

		Fair Value Measured as of December 31, 2024 Using:
		Adjusted Cost				Unrealized Gains				Fair Value				Cash and Cash Equivalent				Marketable Securities
Assets
Level 1
Money market funds		$	5,823			$	—			$	5,823			$	5,823			$	—
Level 2
Corporate bonds			9,660				4				9,664				—				9,664
Commercial paper			945				—				945				—				945
U.S. Government securities			1,402				1				1,403				—				1,403
Total financial assets		$	17,830			$	5			$	17,835			$	5,823			$	12,012
Liabilities
Level 2
Private placement warrant liability		$	—			$	—			$	—			$	—			$	—
Level 3
Derivative warrant liability			—				—				26				—				—
Total financial liabilities		$	—			$	—			$	26			$	—			$	—

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

		Derivative Warrant Liabilities				2025 Note				Total
Balance at December 31, 2024		$	26			$	—			$	26
Additions			1,046				3,266				4,312
Payments and conversions			—				(1,466	)			(1,466	)
Change in fair value included in other income (expense), net			(284	)			197				(87	)
Balance at June 30, 2025		$	788			$	1,997			$	2,785

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

		June 30, 2025
Expected term (years)			4.0
Expected volatility			190.0	%
Risk-free interest rate			3.7	%
Dividend yield			—	%
Exercise price		$	2.22

		June 30, 2025
Expected term (years)			0.7
Expected volatility			190.0	%
Risk-free interest rate			4.1	%
Dividend yield			—	%
Estimated credit spread			35.9	%

X

- Definition

Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.

+ References

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Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

+ References

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Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

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