Quarterly report pursuant to Section 13 or 15(d)

Stockholders' equity - Schedule of warrants or rights (Detail)

v3.24.0.1
Stockholders' equity - Schedule of warrants or rights (Detail) - $ / shares
 3 Months Ended
Aug. 11, 2023
Dec. 31, 2023
Sep. 30, 2023
Outstanding, beginning of period   33,476,440 2,348,039
Outstanding, ending of period   33,431,440 33,476,440
Exercisable at December 31, 2023   33,431,440  
Exercise price of class of warrants or rights outstanding   $ 1.98 $ 1.92
Exercise price of class of warrants or rights outstanding   1.98 $ 1.98
Exercisable at December 31, 2023   $ 1.98  
Series 2 Warrants [Member]      
Pre-funded warrants exercised   20,000  
Pre-funded warrants exercised   $ 1.93  
Common warrants [Member]      
Common warrants issued     16,002,175
Common warrants issued     $ 3.86
Pre-funded warrants [Member]      
Pre-funded warrants issued 15,126,226   15,126,226
Pre-funded warrants exercised   25,000  
Pre-funded warrants issued     $ 0.0001
Pre-funded warrants exercised   $ 0.0001