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Accounts Receivable - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Receivables [Abstract] |  |  |
Amount billed but not received under retainage provisions in contracts | $ 1,600 | $ 1,800 |
Retainage receivables on contracts minimum period |  |  | 1 year
Retainage receivables on contracts maximum period |  |  | 2 years
Provision for doubtful accounts | 1,340 | 688 | $ 928
Charge-offs | $ 600 | $ 300 | $ 400

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- Definition Allowance for doubtful accounts receivable (charge offs) recoveries + References No definition available. + Details
Name: | ceco_AllowanceForDoubtfulAccountsReceivableChargeOffsRecoveries
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Contract receivable retainage1. + References No definition available. + Details
Name: | ceco_ContractReceivableRetainage1
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Retainage receivables on contracts maximum period. + References No definition available. + Details
Name: | ceco_RetainageReceivablesOnContractsMaximumPeriod
Namespace Prefix: | ceco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Retainage receivables on contracts minimum period. + References No definition available. + Details
Name: | ceco_RetainageReceivablesOnContractsMinimumPeriod
Namespace Prefix: | ceco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
Name: | us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration