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Ordinary Share - Additional Information (Detail)
$ / shares in Units, ¥ in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Feb. 28, 2021
USD ($)
shares
Oct. 31, 2020
USD ($)
shares
$ / shares
Mar. 31, 2021
USD ($)
$ / shares
shares
Mar. 31, 2021
CNY (¥)
shares
Mar. 31, 2020
$ / shares
shares
Mar. 31, 2019
shares
Common Stock, Shares, Issued         22,238,454  
Common Stock, Shares, Outstanding         22,238,454  
Number of shares per ADS   0.75        
Proceeds from IPO   $ 64,000 $ 60,090 ¥ 393,698    
IPO [Member]            
Proceeds from IPO | $     $ 50,000      
Common Class A [Member]            
Common Stock, Shares, Issued     54,505,108   0  
Common Stock, Shares, Outstanding     54,505,108   0  
stock issued during period   5,250,000        
Common Stock, Par or Stated Value Per Share | $ / shares     $ 0.001   $ 0.001  
Common Class A [Member] | IPO [Member]            
Common Stock, Par or Stated Value Per Share | $ / shares   $ 0.001        
Stock Repurchased and Retired During Period, Shares 521,924          
Stock Repurchased and Retired During Period, Value | $ $ 4,800          
Common Class B [Member]            
Common Stock, Shares, Issued     13,037,729   0  
Common Stock, Shares, Outstanding     13,037,729   0  
Common Stock, Par or Stated Value Per Share | $ / shares     $ 0.001   $ 0.001  
Preferred Stock, Conversion Basis     one-for-one basis one-for-one basis    
Common Class B [Member] | IPO [Member]            
Stock Issued During Period, Shares, Conversion of Convertible Securities   12,204,604        
ADS [Member]            
Share price | $ / shares   $ 10.00        
ADS [Member] | IPO [Member]            
Sale of Stock, Number of Shares Issued in Transaction   7,000,000        
ADS [Member] | Over-Allotment Option [Member]            
Sale of Stock, Number of Shares Issued in Transaction   1,050,000        
Series A Redeemable Convertible Preferred Shares [Member]            
Convertible Preferred Shares, Outstanding     0   10,340,000  
Series A Redeemable Convertible Preferred Shares [Member] | IPO [Member]            
Convertible Preferred Shares, Outstanding   10,340,000        
Stock Issued During Period, Shares, Conversion of Convertible Securities   7,844,137        
Preferred Stock, Conversion Basis   1: 0.76        
Series B Redeemable Convertible Preferred Shares [Member]            
Convertible Preferred Shares, Outstanding     0   9,067,384  
Series B Redeemable Convertible Preferred Shares [Member] | IPO [Member]            
Convertible Preferred Shares, Outstanding   9,067,384        
Stock Issued During Period, Shares, Conversion of Convertible Securities   8,557,980        
Preferred Stock, Conversion Basis   1:0.94        
Series C Plus Redeemable Convertible Preferred Shares [Member] | IPO [Member]            
Convertible Preferred Shares, Outstanding   6,734,459        
Stock Issued During Period, Shares, Conversion of Convertible Securities   6,883,520        
Preferred Stock, Conversion Basis   1:1.02        
Series C Redeemable Convertible Preferred Shares [Member]            
Convertible Preferred Shares, Outstanding     0   5,518,101  
Preferred Stock, Conversion Basis     one-for-one basis one-for-one basis    
Series C Preferred Stock [Member]            
stock issued during period     0 0 0 0
Series C Preferred Stock [Member] | IPO [Member]            
Convertible Preferred Shares, Outstanding   833,125