Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

+ Details

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

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-1

+ Details

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

- Definition

The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

+ Details

Name:	us-gaap_IncreaseDecreaseInAccountsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ceco_KemcoSystemsCoLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ceco_MalvarEngineeringLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ceco_GeneralRubberLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ceco_TranscendSolutionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ceco_CompassWaterSolutionsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ceco_WesternAirDuctsLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ceco_Ds21CoLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Acquisitions and Joint Ventures - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) - USD ($) $ in Thousands								9 Months Ended
	Aug. 23, 2023	Mar. 31, 2023	Jan. 10, 2023	Sep. 19, 2022	Jun. 22, 2022	May 03, 2022	Mar. 07, 2022	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Accounts Receivable, Net Current Assets								$ 25,961	$ 15,772
Kemco Systems Co Llc [Member]
Business Acquisition [Line Items]
Accounts Receivable, Net Current Assets	$ 2,328
Malvar Engineering Limited [Member]
Business Acquisition [Line Items]
Accounts Receivable, Net Current Assets			$ 2,467
General Rubber LLC [Member]
Business Acquisition [Line Items]
Cash, Current assets							$ 137
Accounts Receivable, Net Current Assets							$ 2,043
Transcend Solution [Member]
Business Acquisition [Line Items]
Cash, Current assets		$ 52
Accounts Receivable, Net Current Assets		$ 1,493
Compass Water Solutions, Inc [Member]
Business Acquisition [Line Items]
Cash, Current assets						$ 334
Accounts Receivable, Net Current Assets						$ 1,254
Western Air Ducts Ltd [Member]
Business Acquisition [Line Items]
Cash, Current assets					$ 1,557
Accounts Receivable, Net Current Assets					$ 936
DS21 Co., Ltd.
Business Acquisition [Line Items]
Cash, Current assets				$ 1,453
Accounts Receivable, Net Current Assets				$ 575