Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail)

v3.22.1
Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:      
Research and development tax credits $ 9,475,588 $ 8,371,302  
Net operating loss carryovers 67,785,680 57,563,810  
Property and equipment 189,271 219,461  
Research and development costs 10,923,959 12,578,612  
Start-up and organizational costs 462 540  
Stock-based compensation 4,659,555 4,041,136  
Operating lease liability 187,132 245,811  
Other accruals 670,065 270,912  
Total gross deferred tax assets 93,891,712 83,291,584  
Less: valuation allowance (93,718,497) (82,929,675) $ (73,892,063)
Total deferred tax assets 173,215 361,909  
Deferred tax liabilities:      
Operating lease right-of-use asset (173,215) (361,909)  
Total deferred tax liabilities (173,215) (361,909)  
Total deferred taxes, net $ 0 $ 0