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Subsequent events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Oct. 19, 2022
Oct. 11, 2022
Jan. 01, 2022
Sep. 30, 2022
Oct. 05, 2022
Subsequent Event [Line Items]          
Sharebased compensation arrangement share options granted during period       0  
Subsequent Event [Member]          
Subsequent Event [Line Items]          
Sharebased compensation arrangement share options granted during period     3,744,386    
Sharebased compensation arrangement share options granted share price per share     $ 2.6    
Sharebased compensation arrangement share options granted vesting period     4 years    
Share based compensation arrangement share options granted fair value per share     $ 2.01    
Sharebased compensation arrangement compensation cost not recognized     $ 7,519    
Common stock exchange ratio     1.45823    
Subsequent Event [Member] | Government Grant [Member]          
Subsequent Event [Line Items]          
Government grant awarded $ 50,000 $ 1,000      
Subsequent Event [Member] | Chief Executive Officer [Member] | Deferred Bonus [Member]          
Subsequent Event [Line Items]          
Accelerated cash bonus payout         $ 2,310