Document and Entity Information	6 Months Ended
	Dec. 31, 2014	Feb. 02, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	ACETO CORP
Entity Central Index Key	0000002034
Trading Symbol	acet
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Common Stock Shares Outstanding		29,108,930
Document Type	10-Q
Document Period End Date	Dec. 31, 2014
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2