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Acquisitions - Additional Information (Detail) (USD $) | 0 Months Ended | 3 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 15, 2014 | Mar. 31, 2015 | Nov. 03, 2014 | Sep. 26, 2014 | Dec. 31, 2014 | Aug. 13, 2014
Zhongli [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Equity interests acquired | 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  |  |  |
Cash paid on acquisition | $ 7,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  |  |  |
Earn out payment upon attainment of specified financial targets through December 31, 2017 | 0 cece_BusinessAcquisitionContingentConsiderationPotentialCashPayments / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  |  |  |
Earn out expenses | 17,100,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember | 800,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  |  |
First year estimated earn-out payable |  | 6,400,000 cece_EstimatedEarnOutPayableAsCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  | 6,400,000 cece_EstimatedEarnOutPayableAsCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |
Remainder of estimated earn-out payable |  | 11,500,000 cece_EstimatedEarnOutPayableAsNonCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  | 11,500,000 cece_EstimatedEarnOutPayableAsNonCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |
Total earn-out payable |  | 17,900,000 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  |  |
Emtrol [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Equity interests acquired |  |  | 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  |  |
Cash paid on acquisition |  |  | 31,900,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  |  |
Company's common stock |  |  | 453,858 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  |  |
Fair value of common stock issued |  |  | 5,800,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  |  |
Trading day period |  |  | 30 days |  |  |
Emtrol [Member] | Thirty Trading Days [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Fair value of common stock issued |  |  | 6,000,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember / us-gaap_TradingActivityByTypeAxis = cece_ThirtyTradingDaysMember |  |  |
SAT Technology, Inc. ("SAT") [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Equity interests acquired |  |  |  | 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |
Cash paid on acquisition |  |  |  | 1,400,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |
Earn out expenses |  | 0 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  | 1,000,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember | 0 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |
First year estimated earn-out payable |  | 300,000 cece_EstimatedEarnOutPayableAsCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  |  |
Remainder of estimated earn-out payable |  | 700,000 cece_EstimatedEarnOutPayableAsNonCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  |  |
Cash held back |  |  |  | 200,000 cece_BusinessAcquisitionCashHeldByAcquiredEntity / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |
HEE [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash paid on acquisition |  |  |  |  |  | 7,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember
Earn out expenses |  | 0 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  |  | 0 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember | 2,000,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember
First year estimated earn-out payable |  | 700,000 cece_EstimatedEarnOutPayableAsCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  |  |  |
Remainder of estimated earn-out payable |  | 1,300,000 cece_EstimatedEarnOutPayableAsNonCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  |  |  |
Company's common stock |  |  |  |  |  | 34,626 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember
Fair value of common stock issued |  |  |  |  |  | 500,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember
Trading day period |  |  |  |  |  | 30 days
Restrictions on sale or transfer for periods range |  |  |  |  |  | 6 months
HEE [Member] | Thirty Trading Days [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Fair value of common stock issued |  |  |  |  |  | $ 500,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember / us-gaap_TradingActivityByTypeAxis = cece_ThirtyTradingDaysMember
Maximum [Member] | Emtrol [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Restrictions on sale or transfer for periods range |  |  | 2 years |  |  |
Minimum [Member] | Emtrol [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Restrictions on sale or transfer for periods range |  |  | 1 year |  |  |

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