Concentraction risk threshold percentage.

No definition available.

Name:	crbo_ConcentractionRiskThresholdPercentage
Namespace Prefix:	crbo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of consolidated partnerships.

+ References

No definition available.

+ Details

Name:	crbo_NumberOfConsolidatedPartnerships
Namespace Prefix:	crbo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The period of time over which the payment for product sales received.

+ References

No definition available.

+ Details

Name:	crbo_PaymentReceivedForProductSalesPeriod
Namespace Prefix:	crbo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	crbo_RetirementObligationsAccruedPercentage
Namespace Prefix:	crbo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

The value of gas balancing asset or liability as of the end of the period.

+ References

No definition available.

+ Details

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

- Definition

Amount of cash inflow for proceeds from settlement of insurance claim, classified as investing activities. Excludes insurance settlement classified as operating activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21B
-URI http://asc.fasb.org/extlink&oid=118932676&loc=SL94080549-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

+ Details

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

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_AutomobilesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerSoftwareIntangibleAssetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=crbo_PipelineFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Significant Accounting Policies (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) Partnerships	Dec. 31, 2018 USD ($)
Accounting Policies [Abstract]
Insurance settlement received	$ 800
Number of consolidated partnerships \| Partnerships	46
Purchaser imbalance receivable	$ 956	$ 551
Discount factor used in ceiling test	10.00%
Accounts Receivable [Member]
Accounting Policies [Abstract]
Concentraction risk threshold percentage	10.00%
Sales Revenue Net [Member]
Accounting Policies [Abstract]
Concentraction risk threshold percentage	10.00%	10.00%
Minimum [Member]
Accounting Policies [Abstract]
Payment received for product sales, period	30 days
Maximum [Member]
Accounting Policies [Abstract]
Payment received for product sales, period	90 days
Office Furniture [Member] \| Minimum [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	3 years
Office Furniture [Member] \| Maximum [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	5 years
Automobiles [Member] \| Minimum [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	3 years
Automobiles [Member] \| Maximum [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	5 years
Computer Hardware [Member] \| Minimum [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	3 years
Computer Hardware [Member] \| Maximum [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	5 years
Computer Software [Member] \| Minimum [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	3 years
Computer Software [Member] \| Maximum [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	5 years
Buildings [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	27 years 6 months
Pipeline Facilities and Equipment [Member]
Accounting Policies [Abstract]
Estimated useful lives of the assets	20 years