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Long-Term Investments - Additional Information (Detail) - CNY (¥)
¥ in Thousands
1 Months Ended 12 Months Ended
Oct. 31, 2019
Oct. 31, 2017
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Long term Investments and Receivables Net [Line Items]          
Carrying value of equity method investments     ¥ 2,973 ¥ 3,104  
Cash consideration       50,000 ¥ 10,745
Qingdao Shuangan Biotechnology Co Ltd [Member]          
Long term Investments and Receivables Net [Line Items]          
Equity method investment ownership percentage   7.20%      
Cash consideration   ¥ 10,000      
Redemption of investment period   48 months      
Investment re-measured at fair value     17,300 17,000  
Unrealized Securities holding gain, Net of tax     20 1,000  
Beijing Petdog Technology Development Co Ltd [Member]          
Long term Investments and Receivables Net [Line Items]          
Equity method investment ownership percentage 23.64%        
Cash consideration ¥ 50,000        
Redemption of investment period 60 months        
Investment re-measured at fair value     54,000 53,300  
Unrealized Securities holding gain, Net of tax     ¥ 750 ¥ 2,300