Note 5 - Financial Instruments and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2026

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

		*As of March 31, 2026 (unaudited)*
		*Carrying Amount*				*Fair Value*				*Quoted Priced in active markets (Level 1)*				*Significant other observable inputs (Level 2)*				*Significant unobservable inputs (Level 3)*
Assets
Money market funds		$	7,021			$	7,021			$	7,021			$	—			$	—
Total assets		$	7,021			$	7,021			$	7,021			$	—			$	—

Liabilities
Derivative liability		$	259			$	259			$	—			$	—			$	259
Total liabilities		$	259			$	259			$	—			$	—			$	259

		*As of December 31, 2025*
		*Carrying Amount*				*Fair Value*				*Quoted Priced in active markets (Level 1)*				*Significant other observable inputs (Level 2)*				*Significant unobservable inputs (Level 3)*
Assets
Money market funds		$	12,191			$	12,191			$	12,191			$	—			$	—
Total assets		$	12,191			$	12,191			$	12,191			$	—			$	—

Liabilities
Derivative liability		$	292			$	292			$	—			$	—			$	292
Total liabilities		$	292			$	292			$	—			$	—			$	292

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

		*Amount*
Balance as of January 1, 2026		$	292
Issuances			—
Adjustment for net change in fair value			(33	)
Balance as of March 31, 2026		$	259

		*Amount*
Balance as of January 1, 2025		$	—
Issuances			320
Adjustment for net change in fair value			(28	)
Balance as of December 31, 2025		$	292