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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($)
Accounting Policies [Abstract]
Benefit of grant amount	$ 71,783

X

- Definition

Investment Tax Credit, Benefit Amount

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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