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Accrued Expenses (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Accrued Expenses |  |
Payroll and related benefits | $ 16,493 | $ 131,530
Accrued interest expense |  | 36,041
Accrued professional and clinical fees | 216,198 | 103,300
Accrued license payments | 3,833 | 506,000
Total accrued expenses | $ 236,524 | $ 776,871

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Includes accrued interest and obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. + References No definition available. + Details
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