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Note 6 - Accrued Expenses | 12 Months Ended
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Dec. 31, 2021
Notes to Financial Statements |
Accrued Expenses and Other Liabilities [Text Block] | 6. Accrued Expenses Accrued expenses and other current liabilities consisted of the following:
|  | As of |
|  | December 31, 2021 |  |  | December 31, 2020 |
Deferred revenue |  | $ | 3,764,696 |  |  | $ | 3,280,947 |
Compensation |  |  | 2,811,700 |  |  |  | 2,933,738 |
Other |  |  | 558,362 |  |  |  | 486,158 |
Professional fees |  |  | 527,026 |  |  |  | 251,824 |
Inventory |  |  | 488,081 |  |  |  | 150,349 |
Lease liability, current portion |  |  | 466,830 |  |  |  | 449,940 |
Vacation |  |  | 379,720 |  |  |  | 405,176 |
Research and development vendor costs |  |  | 256,397 |  |  |  | 327,606 |
Accrued expenses and other current liabilities |  | $ | 9,252,812 |  |  | $ | 8,285,738 |

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