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Note 4 - Accrued Expenses and Other Current Liabilities | 12 Months Ended
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Dec. 31, 2021
Notes to Financial Statements |
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] | 4. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consist of the following:
|  | December 31, |
|  | 2021 |  |  | 2020 |
Accrued payroll and payroll related expenses |  | $ | 879,971 |  |  | $ | 653,899 |
Accrued professional fees |  |  | 247,704 |  |  |  | 31,809 |
Accrued clinical studies expenses |  |  | 786,579 |  |  |  | 1,055,398 |
Other |  |  | 65,935 |  |  |  | 35,364 |
Total |  | $ | 1,980,189 |  |  | $ | 1,776,470 |

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- Definition The entire disclosure for accounts payable, accrued expenses, and other liabilities that are classified as current at the end of the reporting period. + References No definition available. + Details
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