v3.26.1
Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax $ 24,000 $ 21,000 $ (55,000) $ (134,000) $ 45,000 $ (189,000)  
Gain (Loss), Foreign Currency Transaction, before Tax (2,000)   (12,000)   (3,000) 68,000  
Net Income (Loss) Attributable to Parent (2,111,000) $ (1,863,000) (1,868,000) $ (1,733,000) (3,974,000) (3,601,000)  
Retained Earnings (Accumulated Deficit) (219,561,000)       (219,561,000)   $ (215,587,000)
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation         (4,002,000) (3,110,000)  
Contract with Customer, Liability, Revenue Recognized 43,000   $ 25,000   27,000 $ 0  
Unrecognized Tax Benefits $ 0       $ 0   $ 0
Customer Concentration Risk [Member] | Accounts Receivable [Member]              
Number of Customers 4       4   4
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Four Customers [Member]              
Concentration Risk, Percentage         95.70%   95.40%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Seiko Epson [Member]              
Concentration Risk, Percentage 34.00%   23.80%   31.70% 30.80%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Commercial Vehicle OEM [Member]              
Concentration Risk, Percentage 31.20%   34.10%   18.80% 21.30%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Hewlett-Packard Company [Member]              
Concentration Risk, Percentage 18.60%   19.10%   18.40% 19.30%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Alps Alpine [Member]              
Concentration Risk, Percentage 12.40%   17.50%   14.70% 22.30%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Nexty Electronics [Member]              
Concentration Risk, Percentage         14.00%