Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v2.4.1.9
Income Taxes - Additional Information (Detail) (USD $)
12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2013
Income Taxes Disclosure [Line Items]      
Effective tax rate (benefit)/provision (4.00%)us-gaap_EffectiveIncomeTaxRateContinuingOperations 3.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations (34.00%)us-gaap_EffectiveIncomeTaxRateContinuingOperations
Deferred tax assets, operating loss carry forwards, domestic $ 37,100,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic    
Operating loss carry forwards, expiry beginning year 2016    
Deferred tax assets, operating loss carry forwards, state and local 65,800,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal    
Deferred tax assets, operating loss carry forwards, foreign 2,100,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign    
Deferred tax assets capital loss carry forwards, domestic 10,800,000seac_DeferredTaxAssetsCapitalLossCarryforwardsDomestic    
Capital loss carry forwards expiration dates 2018    
Deferred tax assets, tax credit carry forwards, alternative minimum tax 600,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax    
Deferred tax assets, tax credit carry forwards, foreign 2,000,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign    
Valuation allowance 30,369,000us-gaap_DeferredTaxAssetsValuationAllowance 20,789,000us-gaap_DeferredTaxAssetsValuationAllowance  
Valuation allowance increased 9,600,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount    
Allocation of cumulative undistributed earnings of foreign subsidiaries, reinvestment 83,700,000seac_AllocationOfCumulativeUndistributedEarningsOfForeignSubsidiariesReinvestment    
Repatriated amount subject to US tax rate 48,000,000seac_RepatriatedAmountSubjectToDomesticFederalTaxRate    
Incremental tax benefit 500,000seac_IncrementalTaxBenefit    
Tax benefit recognized for the statute of limitations 275,000us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations 439,000us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations  
Tax benefit recognized for the effect of foreign translation 329,000us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation (44,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation  
Tax Expense due to increases in uncertain tax positions 96,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 445,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions  
Balance of gross unrecognized tax benefits, end of period 5,527,000us-gaap_UnrecognizedTaxBenefits 6,035,000us-gaap_UnrecognizedTaxBenefits 9,364,000us-gaap_UnrecognizedTaxBenefits
State and Local Jurisdiction [Member]      
Income Taxes Disclosure [Line Items]      
Deferred tax assets, tax credit carry forwards, research 3,800,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
   
Deferred tax assets tax credit carry forward investment 300,000seac_DeferredTaxAssetsTaxCreditCarryforwardInvestment
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
   
Deferred tax assets tax credit carry forward, expiration period 2016    
Domestic Tax Authority [Member]      
Income Taxes Disclosure [Line Items]      
Deferred tax assets, tax credit carry forwards, research $ 1,800,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember