| 
           Property and Equipment (Detail Textuals) (USD $) 
        In Thousands, unless otherwise specified  | 
        12 Months Ended | |
|---|---|---|
| 
           Sep. 28, 2014 
         | 
        
           Sep. 29, 2013 
         | 
      |
| Property, Plant and Equipment [Abstract] | ||
| Depreciation expense included in cost of goods sold | $ 33us-gaap_CostOfGoodsSoldDepreciation | $ 19us-gaap_CostOfGoodsSoldDepreciation | 
| Depreciation expense included in general and administrative expense | $ 47opxs_DepreciationExpenseIncludedInGeneralAndAdministrativeExpense | $ 50opxs_DepreciationExpenseIncludedInGeneralAndAdministrativeExpense | 
| X | ||||||||||
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- Definition 
          Represents the depreciation included in general and administrative expense. No definition available. 
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| X | ||||||||||
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- Definition 
          The expense recognized in the current period that allocates the cost of a tangible asset over the asset's useful life. This element applies only to an asset used in the production of goods sold. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Details 
          
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