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Leases (Details)	Jun. 30, 2019 USD ($)
Leases [Abstract]
ROU asset	$ 0
ROU Lease liability	$ 0

X

- Definition

Operating lease right of use asset current.

+ References

No definition available.

+ Details

Name:	clb_OperatingLeaseRightOfUseAssetCurrent
Namespace Prefix:	clb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Operating Lease Right Of Use Liability.

+ References

No definition available.

+ Details

Name:	clb_OperatingLeaseRightOfUseLiability
Namespace Prefix:	clb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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