ENDORSEMENT OF NOTE RECEIVABLES (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
ENDORSEMENT OF NOTE RECEIVABLES [Line Items]
Endorsed Bank Acceptance Bill	$ 37,669	$ 43,421

Represents the total endorsed but not yet due bank acceptance bills as of the balance sheet date.

No definition available.

Name:	holi_EndorsedBankAcceptanceBill
Namespace Prefix:	holi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant