Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Net Income (Loss) Attributable to Parent	$ (7,103)	$ (6,202)	$ (1,931)	$ (1,502)	$ (13,305)	$ (3,433)
Retained Earnings (Accumulated Deficit)	(66,506)				(66,506)		$ (52,597)
Cash and Cash Equivalent	2,108		1,184		2,108	1,184	12,645
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation					(10,292)	(2,716)
Cash Equivalents, at Carrying Value	2,200				2,200		12,200
Restricted Cash, Noncurrent	368		$ 0		368	$ 0	0
Inventory, Net	750				750		0
Deferred Costs, Noncurrent	631				631		136
Cash, Uninsured Amount	$ 2,100				$ 2,100		$ 12,100
Lessee, Operating Lease, Renewal Term (Year)	5 years				5 years
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)	2 years 6 months				2 years 6 months
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)	8 years 10 months 24 days				8 years 10 months 24 days
Financial Standby Letter of Credit [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 350				$ 350
Cash Collateral for Borrowed Securities, Percentage	105.00%				105.00%
Restricted Cash, Noncurrent	$ 368				$ 368