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

Minimum value of shares and/or other securities issued by an entity engaged in the maritime industry upon which the Company would be required to pay a commission if such shares and/or other securities are acquired or sold..

No definition available.

Name:	rbne_MinimumValueOfSharesIssuedByEntityEngagedInMaritimeIndustry
Namespace Prefix:	rbne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

Name:	rbne_RelatedPartyTransactionAbstract
Namespace Prefix:	rbne_
Data Type:	xbrli:stringItemType
Balance Type:	na
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Administration costs charged by a related party, investor relations, legal, audit and consultancy fees and stock based compensation cost.

No definition available.

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

Allocated general and administrative expenses, consisting of administration costs, investor relations, legal, audit and consultancy fees and stock based compensation cost, and a flat management fee, charged by a related party.

No definition available.

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

Allocated amount of fixed quarterly fee charged by a related party to provide a shipping related administrative services.

No definition available.

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

A commission rate charged by a related party on all gross proceeds related to capital raised in capital and debt markets.

No definition available.

Name:	rbne_RelatedPartyTransactionCapitalRaisingCommissionRate
Namespace Prefix:	rbne_
Data Type:	dtr-types:percentItemType
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

The percentage of the gross charter hire, freight and the ballast bonus earned under a charter charged as a commission to the Company by a related party.

No definition available.

Name:	rbne_RelatedPartyTransactionCommissionRate
Namespace Prefix:	rbne_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

A commission charged by a related party in connection with each vessel sale and purchase transaction.

No definition available.

Name:	rbne_RelatedPartyTransactionCommissionRateOnEachVesselSaleAndPurchaseTransaction
Namespace Prefix:	rbne_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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

Fixed daily fee charged by a related party to provide 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_RelatedPartyTransactionFixedDailyFee
Namespace Prefix:	rbne_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
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

Recovery fee multiplier applied to the total amount of the flat management fee calculated on an annual basis under an agreement with a related party.

No definition available.

Name:	rbne_RelatedPartyTransactionManagementRecoveryFeeMultiplier
Namespace Prefix:	rbne_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

Termination fee multiplier applied to the total amount of the flat management fee and the per vessel management fee calculated on an annual basis under an agreement with a related party.

No definition available.

Name:	rbne_RelatedPartyTransactionManagementTerminationFeeMultiplier
Namespace Prefix:	rbne_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

Fixed quarterly fee charged by a related party to provide a shipping related administrative services.

No definition available.

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

Term of related party agreement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

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

Term of related party agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

Name:	rbne_RelatedPartyTransactionTermOfAgreement
Namespace Prefix:	rbne_
Data Type:	xbrli:durationItemType
Balance Type:	na
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

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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_IncomeStatementLocationAxis=rbne_VoyageExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
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Data Type:	na
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