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Stockholders' Equity - Stock-Based Compensation Expense (Details) - USD ($) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Stock-based compensation expense |  |  |  |
Total stock-based compensation expense | $ 858,088 | $ 963,758 | $ 1,728,268 | $ 2,044,400
Research and Development |  |  |  |
Stock-based compensation expense |  |  |  |
Total stock-based compensation expense | 229,422 | 270,050 | 467,353 | 588,875
General and Administrative Expense |  |  |  |
Stock-based compensation expense |  |  |  |
Total stock-based compensation expense | $ 628,666 | $ 693,708 | $ 1,260,915 | $ 1,455,525

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