XML 67 R58.htm IDEA: XBRL DOCUMENT
v3.23.2

Stock-based Compensation - Classification of Stock-based Compensation (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 31, 2023 | Jul. 31, 2022 | Jul. 31, 2023 | Jul. 31, 2022
Stock-based compensation: |  |  |  |
Total stock-based compensation | $ 28,122 | $ 26,909 | $ 55,387 | $ 53,950
Cost of revenue [Member] |  |  |  |
Stock-based compensation: |  |  |  |
Total stock-based compensation | 885 | 362 | 1,826 | 711
Research and development [Member] |  |  |  |
Stock-based compensation: |  |  |  |
Total stock-based compensation | 18,550 | 17,883 | 36,911 | 35,034
Selling, general and administrative [Member] |  |  |  |
Stock-based compensation: |  |  |  |
Total stock-based compensation | $ 8,687 | $ 8,664 | $ 16,650 | $ 18,205

X
- Definition Stock based compensation. + References No definition available. + Details
Name: | amba_StockBasedCompensationAbstract
Namespace Prefix: | amba_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_ResearchAndDevelopmentExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |