XML 45 R37.htm IDEA: XBRL DOCUMENT
v3.25.3

Income Taxes (Tables) | 9 Months Ended
--- | ---
Oct. 31, 2025
Income Tax Disclosure [Abstract] |
Summary of Income Taxes | The following table provides details of income taxes for the periods indicated:
|  | Three Months Ended October 31, |  |  | Nine Months Ended October 31, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
|  | (in thousands) |
Loss before income taxes |  | $ | (14,174 | ) |  | $ | (23,419 | ) |  | $ | (57,599 | ) |  | $ | (94,735 | )
Provision for income taxes |  |  | 933 |  |  |  | 652 |  |  |  | 1,831 |  |  |  | 2,157 |
Effective tax rate |  | (6.6)% |  |  | (2.8)% |  |  | (3.2)% |  |  | (2.3)% |

X
- Definition Schedule of income tax expense and effective tax rate. + References No definition available. + Details
Name: | amba_ScheduleOfIncomeTaxExpensesAndEffectiveTaxRateTableTableTextBlock
Namespace Prefix: | amba_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration