Note 5 - Property and Equipment, Net - Schedule of Depreciation Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Depreciation expense	$ 353	$ 366	$ 708	$ 770
General and Administrative [Member]
Depreciation expense	17	29	34	95
Research and Development [Member]
Depreciation expense	$ 336	$ 337	$ 674	$ 675

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration