Name:	rbne_FundingPeriodForAdvanceToCoverVesselDailyOperatingCosts
Namespace Prefix:	rbne_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	rbne_RelatedPartyAdministrationFees
Namespace Prefix:	rbne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

Name:	rbne_RelatedPartyTransactionAbstract
Namespace Prefix:	rbne_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of commissions paid to a related party on the gross proceeds raised in the capital and debt markets.

No definition available.

Name:	rbne_RelatedPartyTransactionCapitalRaisingCommissions
Namespace Prefix:	rbne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Commissions paid to a related party broker on time-charter and voyage-charter arrangements.

No definition available.

Name:	rbne_RelatedPartyTransactionCommissions
Namespace Prefix:	rbne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Fees paid to related parties for providing a wide range of shipping services such as crew management, technical management, operational employment management, insurance arrangements, provisioning, bunkering, accounting services, general administration and audit support.

No definition available.

Name:	rbne_RelatedPartyTransactionManagementFees
Namespace Prefix:	rbne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of commission charged by related party for any sale or purchase of vessels for the Company.

No definition available.

Name:	rbne_RelatedPartyTransactionSaleAndPurchaseCommission
Namespace Prefix:	rbne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount, after allowance for credit loss, of receivable classified as other and noncurrent.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Name:	us-gaap_OtherReceivableAfterAllowanceForCreditLossNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

No definition available.

Name:	us-gaap_OtherReceivablesNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_RelatedPartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_CounterpartyNameAxis=rbne_CastorShipsSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RelatedPartyTransactionAxis=rbne_MasterManagementAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RelatedPartyTransactionAxis=rbne_WorkingCapitalGuaranteeAdvancesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: