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Note A - The Company and Summary of Significant Accounting Policies - Summary of Accounts Receivable (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Accounts receivable | $ 1,604,075 | $ 1,351,482
Allowance for Credit Losses | (383,253) | (633,253)
Accounts receivable, net of allowances for Credit Losses | 1,220,822 | 718,229
Balance | 633,253 | 1,005,785
Charged to costs and expenses | 0 | 16,265
Deductions from reserves | (250,000) | (388,797)
Balance | $ 383,253 | $ 633,253

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