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Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2020	Dec. 31, 2018
Deferred tax assets:
Net operating loss and tax credit carryforwards	$ 66,867,637
Capital loss carryforward	5,683
Accrued expenses	253,374
Start-up costs	5,837
Excess of book over tax depreciation	394,649
Stock option and restricted stock award expense	1,464,210
Debt Extinguishment	59,934
Less: valuation allowance	(68,859,984)	$ (56,819,522)
Deferred tax assets	191,340
Deferred tax liability:
Property and equipment basis	48,545
Prepaid expenses	142,795
Deferred tax liabilities	191,340
Net deferred tax asset	$ 0

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