Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Detail)

v3.21.2
Significant Accounting Policies - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Apr. 30, 2015
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Summary Of Significant Accounting Policies [Line Items]          
Revenue   $ 201,364 $ 61,500 $ 531,389 $ 237,350
Research and development expense, total   4,737,159 $ 4,003,642 15,432,097 12,909,378
Liability for unrecognized tax benefits   $ 0   0  
Interest or penalties for uncertain tax positions       $ 0 $ 0
Antidilutive securities excluded from computation of earnings per share, amount   5,843,167 5,990,698 5,843,167 5,990,698
Employee Stock Purchase Plan [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Common stock purchase price discount percentage 85.00%     15.00%  
Product Development Projects Revenue [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Revenue   $ 201,364 $ 61,500 $ 531,389 $ 107,350
Contract Services Revenue [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Revenue   $ 0 $ 0 $ 0 $ 130,000