Recent Accounting Pronouncements (Narrative) (Detail) $ in Thousands	12 Months Ended
Jun. 30, 2018 USD ($)
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Additional tax expense associated with net tax deficiencies	$ 1,536

Represents additional tax expense of associated with net tax deficiencies.

No definition available.

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