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Note P - Income Taxes - Reconciliation of the Effective Income Tax Rate to US Federal Statutory Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Federal statutory income tax rate	21.00%	21.00%
State taxes, net of federal benefit	0.82%	(1.41%)
Permanent differences	(1.84%)	1.97%
Expiration of net operating loss and research credit carryforwards	(46.14%)	(7.84%)
Expiration and forfeiture of stock options	0.00%	0.00%
foreign rate differential	(7.23%)	(5.84%)
rate change	(0.41%)	(1.05%)
Other	0.14%	(9.08%)
Valuation allowance	33.98%	(0.24%)
Effective tax rate	0.32%	(2.50%)

X

- Definition

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to expiration of net operating loss and research credit carryforwards.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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