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Subsequent Event (Details) - Oct. 21, 2021 - Subsequent Event $ in Millions | purchase_order | location | MW | USD ($) | facility
--- | --- | --- | --- | --- | ---
Subsequent Event [Line Items] |  |  |  |  |
Number of purchase orders | purchase_order | 3 |  |  |  |
Number of locations |  | 3 |  |  | 3
Battery energy storage capacity | MW |  |  | 537.5 |  |
EPCM agreement, engineering, procurement and construction price | $ |  |  |  | $ 892 |

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- Definition Battery Energy Storage Capacity + References No definition available. + Details
Name: | amrc_BatteryEnergyStorageCapacity
Namespace Prefix: | amrc_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

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- Definition EPCM Agreement, Engineering, Procurement And Construction Price + References No definition available. + Details
Name: | amrc_EPCMAgreementEngineeringProcurementAndConstructionPrice
Namespace Prefix: | amrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Number Of Locations + References No definition available. + Details
Name: | amrc_NumberOfLocations
Namespace Prefix: | amrc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number Of Purchase Orders + References No definition available. + Details
Name: | amrc_NumberOfPurchaseOrders
Namespace Prefix: | amrc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |