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BALANCE SHEET COMPONENTS - Accrued expenses and other current liabilities (Details) - USD ($) | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023
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BALANCE SHEET COMPONENTS |  |  |  |  |  |  |  |
Accrued salaries and commissions | $ 3,387,675 |  |  |  | $ 3,344,080 |  |  |
Professional fees | 769,577 |  |  |  | 956,432 |  |  |
Clinical studies | 589,577 |  |  |  | 686,908 |  |  |
Deferred revenue | 419,331 |  |  |  | 1,380,821 |  |  |
Other | 865,510 |  |  |  | 991,545 |  |  |
Accrued expenses and other current liabilities | $ 6,031,670 | $ 5,514,269 | $ 6,185,143 | $ 7,431,606 | $ 7,359,786 | $ 7,280,322 | $ 7,034,859 | $ 6,346,894

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