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Note 3 - Balance Sheet Components - Prepaid Expenses (Details) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Prepaid clinical trial costs (current portion) $ 1,962,913 $ 1,171,077
Prepaid insurance premiums 72,013 107,876
Prepaid rent 13,045 13,045
Other prepaid expenses 91,000 34,000
Total prepaid expenses $ 2,138,971 $ 1,325,998