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Note 1 - Organization and Summary of Significant Accounting Policies - Summary of Revenues Distribution by Geographical Area and Market (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues	$ 430	$ 838	$ 1,542	$ 2,453
Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Revenues, percentage	100.00%	100.00%	100.00%	100.00%
North America [Member]
Revenues	$ 101	$ 163	$ 329	$ 589
North America [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Revenues, percentage	100.00%	100.00%	100.00%	100.00%
North America [Member] | IT and Industrial Customers [Member]
Revenues	$ 101	$ 163	$ 329	$ 589
North America [Member] | IT and Industrial Customers [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Revenues, percentage	100.00%	100.00%	100.00%	100.00%
Asia Pacific [Member]
Revenues	$ 280	$ 552	$ 904	$ 1,431
Asia Pacific [Member] | IT and Industrial Customers [Member]
Revenues	$ 215	$ 409	$ 591	$ 834
Asia Pacific [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Revenues, percentage	100.00%	100.00%	100.00%	100.00%
Asia Pacific [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | IT and Industrial Customers [Member]
Revenues, percentage	76.80%	74.10%	65.40%	58.30%
Asia Pacific [Member] | Automotive Customers [Member]
Revenues	$ 65	$ 143	$ 313	$ 597
Asia Pacific [Member] | Automotive Customers [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Revenues, percentage	23.20%	25.90%	34.60%	41.70%
EMEA [Member]
Revenues	$ 49	$ 123	$ 309	$ 433
EMEA [Member] | Automotive Customers [Member]
Revenues	$ 49	$ 123	$ 309	$ 433
EMEA [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Revenues, percentage	100.00%	100.00%	100.00%	100.00%
EMEA [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | Automotive Customers [Member]
Revenues, percentage	100.00%	100.00%	100.00%	100.00%

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