Note R - Income Taxes - Components of Deferred Taxes (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Accrued compensation	$ 112,201	$ 113,000
Allowance for doubtful accounts	90,405	169,000
Research and development expenses	1,017,551	633,000
Capital loss carry forward	114,251	114,000
Stock-based compensation	32,408	456,000
Equipment and leasehold improvements	(12,353)	(19,000)
Reserve - Foreign	150,000	0
Inventory reserve	828,668	89,000
Interest expense	0	44,000
Operating lease liabilities	0	44,000
Other	1,000	0
Tax credits	1,748,235	0
Operating lease right-of-use assets, asset	206
Operating lease right-of-use assets, liability		(44,000)
Net operating loss and research and credit carryforwards	13,277,118	15,248,000
Valuation allowance	(17,214,690)	(17,188,000)
Net deferred tax liability	0	(170,000)
Domestic Tax Jurisdiction [Member]
Intangible assets - US	0	341,000
Foreign Tax Jurisdiction [Member]
Deferred Tax Liability, Intangible Assets	$ (145,000)	$ (170,000)

The amount of deferred tax assets attributable to leasing arrangements.

No definition available.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from operating lease liabilities.

+ References

No definition available.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from research and development expenses.

+ References

No definition available.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible interest carryforward.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.

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Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from allowance for credit loss on accounts receivable.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from reserves, classified as other.

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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