License agreements, research collaborations and development agreements (Details) (USD $)	3 Months Ended
Mar. 31, 2015 agreement item	Mar. 31, 2014	Dec. 31, 2014 item
License agreements, research collaborations and development agreements
Number of license agreement in which company is a party	2opgn_NumberOfLicenseAgreements
Royalty Expense	$ 23,028us-gaap_RoyaltyExpense	$ 25,034us-gaap_RoyaltyExpense
Future minimum royalty fees	20,000opgn_FutureMinimumRoyaltyPaymentsDue
Number of milestones achieved			16opgn_NumberOfMilestones
Upfront payment received	250,000opgn_LicenseUpfrontPaymentReceived
License revenue recognized	$ 252,780us-gaap_LicensesRevenue	$ 627,780us-gaap_LicensesRevenue

Represents future minimum royalty fees.

No definition available.

Name:	opgn_FutureMinimumRoyaltyPaymentsDue
Namespace Prefix:	opgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	opgn_LicenseAgreementsResearchCollaborationsAndDevelopmentAgreementsAbstract
Namespace Prefix:	opgn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the upfront payment received.

+ References

No definition available.

+ Details

Name:	opgn_LicenseUpfrontPaymentReceived
Namespace Prefix:	opgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents number of license agreement in which company is a party

+ References

No definition available.

+ Details

Name:	opgn_NumberOfLicenseAgreements
Namespace Prefix:	opgn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of milestones achieved.

+ References

No definition available.

+ Details

Name:	opgn_NumberOfMilestones
Namespace Prefix:	opgn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_LicensesRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_RoyaltyExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration