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Commitments and Contingencies - Future Minimum Capital Payments under Certain Data Licensing Agreements (Detail) $ in Thousands | Dec. 31, 2017 USD ($)
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Commitments And Contingencies Disclosure [Abstract] |
2018 | $ 4,990
2019 | 5,930
2020 | 6,250
2021 | 4,775
2022 | 1,302
Total | $ 23,247

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- Definition Capital commitment under certain data licensing agreements due in the next fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | cogt_CapitalCommitmentUnderCertainDataLicensingAgreementsDueCurrent
Namespace Prefix: | cogt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Capital commitment under certain data licensing agreements due in five years. + References No definition available. + Details
Name: | cogt_CapitalCommitmentUnderCertainDataLicensingAgreementsDueInFiveYears
Namespace Prefix: | cogt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Capital commitment under certain data licensing agreements due in four years. + References No definition available. + Details
Name: | cogt_CapitalCommitmentUnderCertainDataLicensingAgreementsDueInFourYears
Namespace Prefix: | cogt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Capital commitment under certain data licensing agreements due in three years. + References No definition available. + Details
Name: | cogt_CapitalCommitmentUnderCertainDataLicensingAgreementsDueInThreeYears
Namespace Prefix: | cogt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Capital commitment under certain data licensing agreements due in two years. + References No definition available. + Details
Name: | cogt_CapitalCommitmentUnderCertainDataLicensingAgreementsDueInTwoYears
Namespace Prefix: | cogt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Capital commitment under certain data licensing agreements, net. + References No definition available. + Details
Name: | cogt_CapitalCommitmentUnderCertainDataLicensingAgreementsNet
Namespace Prefix: | cogt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration