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Basis of Presentation and Summary of Significant Accounting Policies (Schedule of Service Inventory) (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Jul. 03, 2011
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Accounting Policies [Abstract] |  |
Service Inventory | $ 13,109 | $ 13,555
Less: Excess and Obsolete Inventory | 5,074 | 3,976
Service Inventory, Net | $ 8,035 | $ 9,579

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- Definition Inventory Valuation Reserves, Service Materials and Supplies + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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Namespace Prefix: | extr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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