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Revenue - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Revenue From Contract With Customer Line Items [Line Items]
Contract liability revenue recognized	$ 19,436	$ 7,005	$ 46,342	$ 33,136
Transaction price allocated to remaining performance obligations	$ 106,268		$ 106,268		$ 143,529
Performance obligation percentage of transaction price to recognized in the next twelve months	63.00%		63.00%
Accounts Receivable [Member]
Revenue From Contract With Customer Line Items [Line Items]
Unbilled accounts receivable	$ 4,942		$ 4,942		$ 13,628

X

- Definition

Contract with customer liability revenue.

+ References

No definition available.

+ Details

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Namespace Prefix:	amwl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Percentage of transaction price expected to be recognized in the next twelve months.

+ References

No definition available.

+ Details

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Namespace Prefix:	amwl_
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Period Type:	instant

X

- Definition

Revenue from contract with customer [Line items].

+ References

No definition available.

+ Details

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Namespace Prefix:	amwl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: