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Balance Sheet Components - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Depreciation and amortization	$ 5.4	$ 4.2	$ 2.6

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- Definition

Property plant and equipment depreciation and amortization.

+ References

No definition available.

+ Details

Name:	ampl_PropertyPlantAndEquipmentDepreciationAndAmortization
Namespace Prefix:	ampl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration