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Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($) | Jun. 30, 2021 | Dec. 31, 2020
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Prepaid Expenses and Other Current Assets |  |
Prepaid research and development expenses | $ 938,913 | $ 965,504
Other prepaid expenses | 520,298 | 270,675
Other receivables | 1,656 | 2,149
Prepaid expenses and other current assets | $ 1,460,867 | $ 1,238,328

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