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Other Current Assets - Summary of Other Current Assets (Detail) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Prepaid expenses | $ 582,319 | $ 584,765
Project deposit |  |
Deposits | 5,075 | 5,075
Total other current assets | $ 587,394 | $ 589,840

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