Commitments (Details 3) - Standby Equity Distribution Agreement [Member]	6 Months Ended
Jun. 30, 2016 USD ($)
Other Commitments [Line Items]
Percentage of the lowest daily volume weighted average price	95.00%
Number of trading days	5 days
Purchase price	$ 5,000,000
Maximum limit for individual periodic sale of shares	$ 200,000

This element represents the maximum limit of number of shares issued per stock transaction.

No definition available.

Name:	omag_MaximumLimitOfSaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	omag_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of trading days used for calculation of purchase price.

+ References

No definition available.

+ Details

Name:	omag_NumberOfTradingDays
Namespace Prefix:	omag_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the amount of purchase price of the shares.

+ References

No definition available.

+ Details

Name:	omag_PurchasePrice
Namespace Prefix:	omag_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the percentage of the lowest daily volume weighted average price for a share considered as a base for fixing purchase price.

+ References

No definition available.

+ Details

Name:	omag_PurchasePricePercentage
Namespace Prefix:	omag_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_CollectiveBargainingArrangementAxis=omag_EquityFinancingAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: