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

6 Months Ended

Jun. 30, 2026

Notes Tables

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

	As of June 30, 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	$	2,193	$	2,193	$	2,193	$	—	$	—
Total assets	$	2,193	$	2,193	$	2,193	$	—	$	—
Liabilities
Derivative liability	$	212	$	212	$	—	$	—	$	212
Total liabilities	$	212	$	212	$	—	$	—	$	212

	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		(80	)
Balance as of June 30, 2026	$	212

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