Going Concern (Details Textual) - USD ($)	Apr. 30, 2016	Jul. 31, 2015
Going Concern [Line Items]
Working Capital Deficit	$ 1,653,576	$ 3,107,160

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