2.4.0.81050 - Disclosure - Lease Termination Coststruefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001171014duration2013-01-01T00:00:002013-07-01T00:00:001true 1cosi_LeaseTerminationCostsDisclosureAbstractcosi_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Lease Termination Costs2false 2cosi_LeaseTerminationCostsDisclosureTextBlockcosi_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;"> Note 5 — Lease Termination Costs   The lease termination costs incurred during the six months ended July 1, 2013 and July 2, 2012 relate to the closing of three and one location, respectively, during the periods reported. Future store closings, if any, resulting from our decision to close underperforming locations prior to their scheduled lease expiration dates may result in additional lease termination charges. For all exit activities, we estimate our likely liability under contractual leases for restaurants that have been closed. Such estimates have affected the amount and timing of charges to operating results and are impacted by management’s judgments about the time it may take to find a suitable subtenant or assignee, or the terms under which a termination of the lease agreement may be negotiated with the landlord. We recognize costs associated with exit or disposal activities at the time a commitment to an exit or disposal plan is communicated to the landlord.   </div>falsefalsefalsenonnum:textBlockItemTypenaThis element represents disclosure in respect of lease termination and store closing cost of unsuccessful restaurants.No definition available.false0Lease Termination CostsfalseLease Termination CostsUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.getcosi.com/role/DisclosureLeaseTerminationCosts12