Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Valuation Allowance (Detail)

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Income Taxes - Summary of Valuation Allowance (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
January 1, $ 73,892,063 $ 63,349,287
Increase in valuation allowance 9,037,612 10,542,776
December 31, $ 82,929,675 $ 73,892,063