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Note A - The Company and Summary of Significant Accounting Policies - Share-based Compensation Expenses for Continuing Operations (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Share-based compensation expense | $ 166,575 | $ 243,250
Selling, General, and Administrative [Member] |  |
Share-based compensation expense | 139,131 | 201,100
Research, Development and Engineering [Member] |  |
Share-based compensation expense | $ 27,444 | $ 42,150

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