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v3.21.2

Summary of Significant Accounting Policies - Additional Information (Details) - Customer | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Accounting Policies [Abstract] |  |
Number of Customer | 1 | 1
Customers percentage of total revenue | 100.00% | 100.00%

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- Definition Customers percentage of total revenue. + References No definition available. + Details
Name: | acet_CustomersPercentageOfTotalRevenue
Namespace Prefix: | acet_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of customer. + References No definition available. + Details
Name: | acet_NumberOfCustomer
Namespace Prefix: | acet_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration