Note 8 - Interest Expense and Other - Schedule of Interest Expense and Other Nonoperating Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Common stock purchase agreements costs	$ 97	$ 195	$ 233	$ 306
Debt issuance costs	0	36	0	2,020
Amortization of premiums (accretion of discounts) on marketable securities, net	(103)	(90)	(194)	(181)
Expected credit losses	0	2	0	2
Foreign exchange gains (losses)	(9)	221	(79)	323
Other	3	1	6	3
Interest expense and other	$ (12)	$ 365	$ (34)	$ 2,473

Amount of common stock purchase agreement costs.

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Represents the amount of interest expense and other nonoperating expense classified as other.

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Amount of amortization expense attributable to debt issuance costs.

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Amount, before tax, of realized and unrealized gain (loss) from foreign currency transaction.

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Amount of accretion (amortization) of purchase discount (premium) on nonoperating securities.

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Amount of income (expense) related to nonoperating activities, classified as other.

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Amount of credit loss expense (reversal of expense) for financing receivable.

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