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Note C - Summary of Significant Accounting Policies (Details Textual) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) shares
Payments for Repurchase of Redeemable Noncontrolling Interest | $ 214,000 |  |
Allowance for Sales Returns |  | $ 0 | $ 179,000
Number of Operating Segments |  | 2 |
Marketable Securities, Current | 2,976,573 | $ 2,976,573 | 0
Accounts Receivable, Allowance for Credit Loss | 10,000 | 10,000 | 10,000
Unrecognized Tax Benefits | 0 | 0 | 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense |  | $ 0 | $ 0
Weighted Average Number of Shares Outstanding, Basic (in shares) | shares |  | 72,775,781 | 70,607,338
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares |  | 3,771,151 | 7,855,160
Marketable Securities | $ 2,976,573 | $ 2,976,573 |
Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 3 years | 3 years |
Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 7 years | 7 years |
US Treasury Securities [Member] |  |  |
Marketable Securities, Current | $ 3,000,000 | $ 3,000,000 |
Money Market Funds [Member] |  |  |
Cash Equivalents, at Carrying Value | $ 3,000,000 | $ 3,000,000 | $ 8,700,000

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