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Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual)	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	$ (33,000)	$ (55,000)	$ (134,000)	$ (30,000)	$ (32,000)	$ (34,000)	$ (222,000)	$ (96,000)
Gain (Loss), Foreign Currency Transaction, before Tax	(13,000)			(3,000)			(67,000)	(1,000)
Net Income (Loss) Attributable to Parent	14,184,000	$ (1,868,000)	$ (1,733,000)	(1,087,000)	$ (1,695,000)	$ (2,084,000)	10,583,000	(4,866,000)
Retained Earnings (Accumulated Deficit)	(213,497,000)						(213,497,000)		$ (224,080,000)
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation							(4,637,000)	(4,429,000)
Contract with Customer, Liability, Revenue Recognized	38,000			25,000			0	2,000
Receivable From Patent Assignment	19,389,000						19,389,000		0
Patent Assignment, Broker Fee, Expense	3,878,000			(0)			3,878,000	(0)
Unrecognized Tax Benefits	0						0		0
Patent Assignment, Gain	19,389,000			$ 0			19,389,000	$ 0
Accrued Broker Fee From Patent Assignment	$ 3,878,000						$ 3,878,000		$ 0
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Customers	3						3		4
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Three Customers [Member]
Concentration Risk, Percentage							83.80%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Four Customers [Member]
Concentration Risk, Percentage									80.90%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Seiko Epson [Member]
Concentration Risk, Percentage	46.30%			30.60%			35.10%	25.20%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Hewlett-Packard Company [Member]
Concentration Risk, Percentage	21.50%			14.60%			19.90%	20.70%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Alps Alpine [Member]
Concentration Risk, Percentage	15.00%			15.30%			20.20%	20.40%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Commercial Vehicle OEM [Member]
Concentration Risk, Percentage				12.35%			17.80%	13.40%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Nexty Electronics [Member]
Concentration Risk, Percentage				17.90%

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