Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Detail)

v3.22.2.2
Significant Accounting Policies - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Apr. 30, 2015
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Summary Of Significant Accounting Policies [Line Items]          
Revenue   $ 223,201 $ 201,364 $ 672,133 $ 531,389
Research and development expense, total   2,885,830 4,737,159 9,622,886 15,432,097
Liability for unrecognized tax benefits   0   0  
Interest or penalties for uncertain tax positions   $ 0 $ 0 $ 0 $ 0
Antidilutive securities excluded from computation of earnings per share, amount   6,346,398 5,843,167 6,346,398 5,843,167
Warrants Issued to Private Investors [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Antidilutive securities excluded from computation of earnings per share, amount   3,284,789 3,284,789 3,284,789 3,284,789
Warrants Issued to Private Investors [Member] | Expired on October 6 2022          
Summary Of Significant Accounting Policies [Line Items]          
Antidilutive securities excluded from computation of earnings per share, amount       1,618,123  
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 23.00   $ 23.00  
Warrants Issued to Private Investors [Member] | Expiring on March 1 2024          
Summary Of Significant Accounting Policies [Line Items]          
Antidilutive securities excluded from computation of earnings per share, amount       1,666,666  
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 10.00   $ 10.00  
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   $ 223,201 $ 201,364 $ 672,133 $ 531,389