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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, 2024 | Dec. 31, 2023
Share-based compensation expense | $ 243,250 | $ 265,732
Selling, General and Administrative Expenses [Member] |  |
Share-based compensation expense | 201,100 | 209,134
Research and Development Expense [Member] |  |
Share-based compensation expense | $ 42,150 | $ 56,598

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