Financial Instruments - Summary of Movement in Allowance for Impairment in Respect of Contract Assets and Trade and Other Receivables (Detail) - Trade and other receivables [Member] - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Disclosure Of Financial Assets [Line Items] | ||
| Allowance account for credit losses of financial assets at beginning of period | $ 3,199 | $ 2,614 |
| Allowance for impairment | 1,168 | 837 |
| Amounts written off against the allowance | (464) | (201) |
| Effects of movement in exchange rate | (51) | (51) |
| Allowance account for credit losses of financial assets at end of period | $ 3,852 | $ 3,199 |