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Nature of Business and Summary of Significant Accounting Policies - Number of Shares Outstanding for Calculation of Earnings (Loss) Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Basic net income and earnings per share, Numerator (Income) | $ 2,767 us-gaap_NetIncomeLoss | $ (1,461)us-gaap_NetIncomeLoss | $ 3,043 us-gaap_NetIncomeLoss | $ 2,208 us-gaap_NetIncomeLoss | $ 1,860 us-gaap_NetIncomeLoss | $ 3,703 us-gaap_NetIncomeLoss | $ 4,493 us-gaap_NetIncomeLoss | $ 3,021 us-gaap_NetIncomeLoss | $ 13,077 us-gaap_NetIncomeLoss | $ 6,557 us-gaap_NetIncomeLoss | $ 10,850 us-gaap_NetIncomeLoss
Common stock equivalents arising from stock options and employee stock purchase plan, Numerator (Income) |  |  |  |  |  |  |  |  | 0 us-gaap_AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits | 0 us-gaap_AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits | 0 us-gaap_AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits
Subordinated convertible promissory notes, Numerator (Income) |  |  |  |  |  |  |  |  |  |  | 303 us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther
Diluted net income and earnings per share, Numerator (Income) |  |  |  |  |  |  |  |  | $ 13,077 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ 6,557 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ 11,153 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Basic net income and earnings per share, Denominator (Shares) |  |  |  |  |  |  |  |  | 25,750,972 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 20,116,991 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 14,813,186 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Common stock equivalents arising from stock options and employee stock purchase plan, Denominator (Shares) |  |  |  |  |  |  |  |  | 446,000 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 603,000 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 327,000 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Subordinated convertible promissory notes, Denominator (shares) |  |  |  |  |  |  |  |  |  |  | 2,106,000 us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities
Diluted net income and earnings per share, Denominator (Shares) |  |  |  |  |  |  |  |  | 26,196,901 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 20,719,951 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 17,246,058 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic net income and earnings per share, Per Share Amount | $ 0.11 us-gaap_EarningsPerShareBasic | $ (0.07)us-gaap_EarningsPerShareBasic | $ 0.17 us-gaap_EarningsPerShareBasic | $ 0.13 us-gaap_EarningsPerShareBasic | $ 0.07 us-gaap_EarningsPerShareBasic | $ 0.14 us-gaap_EarningsPerShareBasic | $ 0.18 us-gaap_EarningsPerShareBasic | $ 0.12 us-gaap_EarningsPerShareBasic | $ 0.51 us-gaap_EarningsPerShareBasic | $ 0.33 us-gaap_EarningsPerShareBasic | $ 0.73 us-gaap_EarningsPerShareBasic
Common stock equivalents arising from stock options and employee stock purchase plan, Per share amount |  |  |  |  |  |  |  |  | $ (0.01)cece_ImpactOfCommonStockEquivalentsArisingFromShareBasedPaymentArrangementsOnEarningsPerShareBasic | $ (0.01)cece_ImpactOfCommonStockEquivalentsArisingFromShareBasedPaymentArrangementsOnEarningsPerShareBasic |
Subordinated convertible promissory notes, Per Share Amount |  |  |  |  |  |  |  |  |  |  | $ (0.08)cece_DilutiveEffectOfConversionOfDebtSecuritiesOnBasicEarningsPerShare
Diluted net income and earnings per share | $ 0.11 us-gaap_EarningsPerShareDiluted | $ (0.07)us-gaap_EarningsPerShareDiluted | $ 0.17 us-gaap_EarningsPerShareDiluted | $ 0.12 us-gaap_EarningsPerShareDiluted | $ 0.07 us-gaap_EarningsPerShareDiluted | $ 0.14 us-gaap_EarningsPerShareDiluted | $ 0.17 us-gaap_EarningsPerShareDiluted | $ 0.12 us-gaap_EarningsPerShareDiluted | $ 0.50 us-gaap_EarningsPerShareDiluted | $ 0.32 us-gaap_EarningsPerShareDiluted | $ 0.65 us-gaap_EarningsPerShareDiluted

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