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Note 4 - Income Taxes - Component of Deferred Tax Assets (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Stock option expense	$ 1,341,900	$ 947,400
NOL carryforward	11,524,900	10,509,900
Research and development credits	1,623,100	1,656,500
Section 174 - R&D expenses	1,046,400	0
Unrealized gain from investment in Alphazyme	0	(72,100)
Other	(78,200)	(6,100)
Deferred tax asset, net of deferred tax liabilities	15,458,100	13,035,600
Valuation allowance	(15,458,100)	(13,035,600)
Net deferred tax asset	$ 0	$ 0

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Amount before allocation of valuation allowances of deferred tax asset attributable to capitalized research and development.

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