Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Additional Information (Detail)

v3.23.1
Significant Accounting Policies - Additional Information (Detail) - USD ($)
 12 Months Ended
Apr. 30, 2015
Dec. 31, 2022
Dec. 31, 2021
Summary Of Significant Accounting Policies [Line Items]      
Revenue   $ 851,321 $ 756,793
Research and development expense, total   12,497,781 20,572,580
Liability for unrecognized tax benefits   0  
Interest or penalties for uncertain tax positions   $ 0 $ 0
Antidilutive securities excluded from computation of earnings per share, amount   4,132,060 5,519,068
Warrants Issued to Private Investors [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Antidilutive securities excluded from computation of earnings per share, amount   1,666,666 3,284,789
Warrants Issued to Private Investors [Member] | Expiring at 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 Rights1   $ 23.00  
Warrants Issued to Private Investors [Member] | Expiring at 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 Rights1   $ 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   $ 851,321 $ 756,793