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Note 9 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Net operating loss carryforwards | $ 3,864,189 | $ 1,504,496
Stock-based compensation | 1,571,227 | 1,381,750
Orphan Drug credits | 541,384 | 81,700
Lease liability | 38,394 | 63,589
Capitalized start-up costs and other | 10,709,631 | 9,187,898
Valuation allowance | (14,906,646) | (12,051,440)
Deferred tax assets | 1,818,179 | 167,993
Intangible assets | (2,223,678) | (2,223,678)
Right of use asset | (38,394) | (63,589)
Deferred tax liabilities | (2,262,072) | (2,287,267)
Net deferred tax liability | $ (443,893) | $ (2,119,274)

X
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from lease liability. + References No definition available. + Details
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