Summary of Significant Accounting Polices - Summary of Movement of Allowance for Credit Losses (Detail) ¥ in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Mar. 31, 2026
CNY (¥)
|
Mar. 31, 2026
USD ($)
|
Mar. 31, 2025
CNY (¥)
|
Mar. 31, 2024
CNY (¥)
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Reversals/(Provisions) | ¥ 17 | $ 2 | ¥ (7,344) | ¥ (2,649) |
| Gain on deconsolidation of a subsidiary | 36,909 | $ 5,351 | 0 | 0 |
| Accounting Standards Update 2016-13 [Member] | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Balance at the beginning of year | (13,556) | (6,373) | (30,605) | |
| Cumulative effect of adoption of new accounting standard | 0 | 0 | (1,707) | |
| Reversals/(Provisions) | 17 | (7,344) | (2,649) | |
| Write-offs | 16 | 161 | 28,588 | |
| Gain on deconsolidation of a subsidiary | 851 | 0 | 0 | |
| Balance at the end of year | ¥ (12,672) | ¥ (13,556) | ¥ (6,373) | |