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Leases - Additional Information (Detail)
 12 Months Ended
Mar. 31, 2021
Bottom of Range [Member]  
Disclosure of operating lease [Line Items]  
Lease property expiration period 1 year
Lease property extension period 3 years
Top of Range [Member]  
Disclosure of operating lease [Line Items]  
Lease property expiration period 12 years
Lease property extension period 5 years