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Disposition of Product Line - Additional Information (Detail) (Sale of Halloween Portion of PMG's Business [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Dec. 31, 2014
Sep. 30, 2012
employee
Dec. 31, 2014
Sep. 05, 2012
Sale of Halloween Portion of PMG's Business [Member]
       
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Sale price of business portion sold       $ 2,281css_SalePriceOfDisposalPortionOfBusiness
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
Restructuring charges   3,998us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
   
Severance of employees (in number of employees)   49us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
   
Severance of employees cost   1,282us-gaap_SeveranceCosts1
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
   
Facility closure costs   1,375us-gaap_BusinessExitCosts1
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
   
Professional fees related with sale of business   1,341us-gaap_OtherRestructuringCosts
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
   
Incurred transaction cost   523css_TransactionCostIncurredOnDisposalPortionOfBusiness
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
   
Company made payments related to restructuring 89us-gaap_PaymentsForRestructuring
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
  85us-gaap_PaymentsForRestructuring
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
 
Reduction in Restructuring accrual     118us-gaap_RestructuringReserveAccrualAdjustment
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
 
Remaining liability related with other current liabilities $ 21us-gaap_RestructuringReserveCurrent
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember
  $ 21us-gaap_RestructuringReserveCurrent
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= css_PortionOfBusinessSoldMember