Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Additional Information (Detail)

v2.4.1.9
Employee Benefit Plans - Additional Information (Detail) (USD $)
 12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2013
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Interest costs $ 39,000us-gaap_DefinedBenefitPlanInterestCost $ 33,000us-gaap_DefinedBenefitPlanInterestCost  
Service cost 200,000us-gaap_DefinedBenefitPlanServiceCost 200,000us-gaap_DefinedBenefitPlanServiceCost  
Actuarial loss 400,000us-gaap_DefinedBenefitPlanActuarialGainLoss 0us-gaap_DefinedBenefitPlanActuarialGainLoss  
Unfunded projected benefit obligation 1,200,000us-gaap_DefinedBenefitPlanFundedStatusOfPlan 700,000us-gaap_DefinedBenefitPlanFundedStatusOfPlan  
Benefit payments related to plan 300,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter    
Benefit obligation, projected discount rate 4.20%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate 5.90%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate  
Periodic benefit costs, projected discount rate 4.20%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate 5.90%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate  
Benefit obligation, compensation increase rate 7.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease 7.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease  
Periodic benefit costs, compensation increase rate 7.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease 7.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease  
Periodic benefit costs 500,000us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost 200,000us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost 200,000us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Retirement Savings Plan [Member]      
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Defined contribution plan, cost recognized $ 1,700,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= seac_RetirementSavingsPlanMember 		$ 1,700,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= seac_RetirementSavingsPlanMember 		$ 1,400,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= seac_RetirementSavingsPlanMember