Going Concern (Details Textual)	Jul. 31, 2016 USD ($)
Going Concern [Line Items]
Working Capital Deficit	$ 2,380,539

Amount of working capital deficit as of the balance sheet date.

No definition available.

Name:	opnt_WorkingCapitalDeficit
Namespace Prefix:	opnt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant