XML 43 R37.htm IDEA: XBRL DOCUMENT
v3.25.2

Income Taxes (Tables) | 6 Months Ended
--- | ---
Jul. 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 July 31, |  |  | Six Months Ended July 31, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
|  | (in thousands) |
Loss before income taxes |  | $ | (19,742 | ) |  | $ | (34,142 | ) |  | $ | (43,425 | ) |  | $ | (71,316 | )
Provision for income taxes |  |  | 253 |  |  |  | 747 |  |  |  | 898 |  |  |  | 1,505 |
Effective tax rate |  | (1.3)% |  |  | (2.2)% |  |  | (2.1)% |  |  | (2.1)% |

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