Defined Contribution Plan - Additional Information (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)
Defined Contribution Plan [Abstract]
Defined contribution plan for employees	$ 0

Company contribution to plan with respect to employees contribution.

No definition available.

Name:	acet_CompanyContributionToPlanWithRespectToEmployeesContribution
Namespace Prefix:	acet_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration