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Stock-based compensation - Abveris Acquisition (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Dec. 01, 2021
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock based compensation expense   $ 22,337 $ 11,552 $ 40,405 $ 18,575
Recognize cost weighted average period       1 year 3 months 18 days  
Abveris          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Awards aggregate fair value $ 20,100        
Vesting period 2 years        
Stock based compensation expense       $ 4,500  
Unrecognized compensation cost   $ 15,700   $ 15,700  
Recognize cost weighted average period       1 year 4 months 24 days  
Abveris | Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Equity awards restricted shares 231,876        
Shares expected to vest   231,876   231,876  
Granted (in usd per share)       $ 87.06