Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Summary of RSU and DSU Activity (Detail)

v2.4.1.9
Stockholders' Equity - Summary of RSU and DSU Activity (Detail) (Restricted Stock Units and Deferred Stock Units [Member], USD $)
12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2013
Restricted Stock Units and Deferred Stock Units [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested Shares at beginning of period 446,468us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
552,980us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
721,365us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
Awarded Shares 314,057us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
146,411us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
375,317us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
Vested Shares (287,485)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
(205,928)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
(348,346)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
Forfeited/expired/cancelled Shares (37,734)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
(46,995)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
(195,356)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
Nonvested Shares at end of period 435,306us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
446,468us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
552,980us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
Nonvested Weighted average grant date fair value at beginning of period $ 9.81us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 10.51us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 10.46us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
Awarded Weighted average grant date fair value $ 8.60us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 11.15us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 8.62us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
Vested Weighted average grant date fair value $ 9.83us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 12.61us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 8.73us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
Forfeited/expired/cancelled Weighted average grant date fair value $ 10.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 9.93us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 9.87us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
Nonvested Weighted average grant date fair value at ending of period $ 8.91us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 9.81us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember
$ 10.51us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= seac_RestrictedStockUnitsAndDeferredStockUnitsMember