Fair value measurements (Details Textual)	9 Months Ended
Sep. 30, 2016 USD ($)
Fair Value Disclosures [Abstract]
Assets transferred between fair value measurement levels	$ 0

Fair value assets between levels transfers amount.

No definition available.

Name:	opgn_FairValueAssetsBetweenLevelsTransfersAmount
Namespace Prefix:	opgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration