XML 74 R61.htm IDEA: XBRL DOCUMENT v3.24.1

Accrued and Other Current Liabilities - Additional Information (Detail) $ in Millions	12 Months Ended
	Jan. 31, 2024 USD ($)
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	$ 5.6
Cash [Member]
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	1.1
Restricted stock units [Member]
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	$ 4.5

X

- Definition

Payments for bonus.

+ References

No definition available.

+ Details

Name:	amba_PaymentsForBonus
Namespace Prefix:	amba_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Schedule of accrued liabilities.

+ References

No definition available.

+ Details

Name:	amba_ScheduleOfAccruedLiabilitiesLineItems
Namespace Prefix:	amba_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_CashMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: