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REVENUE - Nature of Goods and Services (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
REVENUE
Deferred revenue	$ 6,165	$ 7,067

X

- Definition

Deferred Service Revenue

+ References

No definition available.

+ Details

Name:	aeis_DeferredServiceRevenue
Namespace Prefix:	aeis_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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