v3.26.1
Parent Company Only Condensed Financial Information - Condensed Statements of Operations and Comprehensive Loss (Parenthetical) (Detail) - CNY (¥)
¥ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Condensed Financial Statements, Captions [Line Items]      
Foreign currency translation adjustments, tax ¥ 0 ¥ 0 ¥ 0
Parent Company      
Condensed Financial Statements, Captions [Line Items]      
Foreign currency translation adjustments, tax ¥ 0 ¥ 0 ¥ 0