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Note 6 - Accrued Expenses and Other Current Liabilities | 3 Months Ended | 12 Months Ended
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Mar. 31, 2023 | Dec. 31, 2022
Notes to Financial Statements |  |
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] |
6. | Accrued Expenses and Other Current Liabilities
Accrued expenses and other current liabilities consisted of the following as of the dates indicated below:
|  | March 31, 2023 |  |  | December 31, 2022 |
Accrued payroll and payroll related expenses |  | $ | 302,085 |  |  | $ | 131,777 |
Accrued professional fees |  |  | 734,371 |  |  |  | 552,785 |
Accrued clinical studies expenses |  |  | 16,745 |  |  |  | 475,141 |
Other |  |  | 101,274 |  |  |  | 129,851 |
Total |  | $ | 1,154,475 |  |  | $ | 1,289,554 |
| 6. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consist of the following:
|  | December 31, |
|  | 2022 |  |  | 2021 |
Accrued payroll and payroll related expenses |  | $ | 131,777 |  |  | $ | 879,971 |
Accrued professional fees |  |  | 552,785 |  |  |  | 247,704 |
Accrued clinical studies expenses |  |  | 475,141 |  |  |  | 786,579 |
Other |  |  | 129,851 |  |  |  | 65,935 |
Total |  | $ | 1,289,554 |  |  | $ | 1,980,189 |

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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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