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Note 6 - Accrued Expenses and Other Current Liabilities | 9 Months Ended
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Sep. 30, 2021
Notes to Financial Statements |
Accrued Expenses and Other Liabilities [Text Block] | 6. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of the following:
|  | As of |
|  | September 30, 2021 |  |  | December 31, 2020 |
Deferred revenue |  | $ | 3,587,390 |  |  | $ | 3,280,947 |
Compensation |  |  | 2,420,266 |  |  |  | 2,933,738 |
Research and development vendor costs |  |  | 585,854 |  |  |  | 327,606 |
Professional fees |  |  | 585,019 |  |  |  | 251,824 |
Lease liability, current portion |  |  | 496,683 |  |  |  | 449,940 |
Inventory |  |  | 462,390 |  |  |  | 150,349 |
Other |  |  | 416,966 |  |  |  | 486,158 |
Vacation |  |  | 376,303 |  |  |  | 405,176 |
Income tax payable |  |  | 48,257 |  |  |  | 919,555 |
Accrued expenses and other current liabilities |  | $ | 8,979,128 |  |  | $ | 9,205,293 |

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