v3.26.1
Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax $ 21,000 $ (134,000)  
Gain (Loss), Foreign Currency Transaction, before Tax (1,000) 80,000  
Net Income (Loss) Attributable to Parent (1,863,000) (1,733,000)  
Retained Earnings (Accumulated Deficit) (217,450,000)   $ (215,587,000)
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation (2,106,000) (1,360,000)  
Contract with Customer, Liability, Revenue Recognized 9,000 $ 0  
Unrecognized Tax Benefits $ 0   $ 0
Customer Concentration Risk [Member] | Accounts Receivable [Member]      
Number of Customers 4   4
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Four Customers [Member]      
Concentration Risk, Percentage 89.30%   95.40%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Seiko Epson [Member]      
Concentration Risk, Percentage 29.90% 39.00%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Nexty Electronics [Member]      
Concentration Risk, Percentage 23.70%    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Commercial Vehicle OEM [Member]      
Concentration Risk, Percentage 18.20%    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Hewlett-Packard Company [Member]      
Concentration Risk, Percentage 16.40% 19.60%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Alps Alpine [Member]      
Concentration Risk, Percentage   27.80%