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DERIVATIVE INSTRUMENTS: (Details Textual) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Reassessed Estimated Fair Value of Award | $ 18.0 roia_ReassessedEstimatedFairValueOfAward | $ 13.7 roia_ReassessedEstimatedFairValueOfAward

X
- Definition Represents the reassessed estimated fair value of award amount adjusted liability. + References No definition available. + Details
Name: | roia_ReassessedEstimatedFairValueOfAward
Namespace Prefix: | roia_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration