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Fair value measurement - Additional Information (Detail)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 12, 2021
USD ($)
Investment
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2022
USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Unrealized gains on short-term investments   $ 258 $ 359  
Unrealized gains reclassified to earnings   7 $ 121  
CSAM [Member]        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Number of short-term funds invested | Investment 2      
Aggregate investment in suspend redemptions $ 110,350      
Payments for (proceeds from) short-term investments $ 89,000      
Impairment expense   $ 1,000    
Impairment of investments       $ 3,300