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Summary of Stock Option Activity (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Options    
Outstanding at beginning of period 711  
Granted 60  
Exercised (56)  
Cancelled and expired (3)  
Outstanding at end of period 712 711
Exercisable at end of period 562  
Options vested and expected to vest at end of period 712  
Weighted Average Exercise Price    
Outstanding at beginning of period $ 141.87  
Granted 285.52  
Exercised 38.02  
Cancelled and expired 259.61  
Outstanding at end of period 161.56 $ 141.87
Exercisable at end of period 135.54  
Options vested and expected to vest at end of period $ 161.56  
Weighted Average Remaining Contractual Term (years)    
Outstanding 5 years 9 months 7 days 5 years 5 months 16 days
Exercisable at end of period 4 years 10 months 21 days  
Options vested and expected to vest at end of period 5 years 9 months 7 days  
Aggregate Intrinsic Value    
Outstanding at end of period $ 111,794  
Exercisable at end of period 103,757  
Options vested and expected to vest at end of period $ 111,794