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 6 Months Ended
Apr. 30, 2015
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Summary Of Significant Accounting Policies [Line Items]          
Revenue   $ 184,960 $ 114,375 $ 330,025 $ 175,850
Research and development expense, total   6,103,694 $ 4,330,433 10,694,938 8,905,736
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   6,323,445 6,945,580 6,323,445 6,945,580
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   $ 184,960 $ 25,000 $ 330,025 $ 45,850
Royalty Revenue [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Revenue   0 0 0 0
Contract Services Revenue [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Revenue   $ 0 $ 89,375 $ 0 $ 130,000