| 
           Intangible Assets (Schedule Of Finite-Lived Intangible Assets) (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        
           Dec. 31, 2014 
         | 
        
           Dec. 31, 2013 
         | 
      
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 811us-gaap_FiniteLivedIntangibleAssetsGross | $ 802us-gaap_FiniteLivedIntangibleAssetsGross | 
| Accumulated Amortization | (346)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | (158)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | 
| Foreign Currency Translation | (41)jcs_FiniteLivedIntangibleAssetsForeignCurrencyTranslation | (96)jcs_FiniteLivedIntangibleAssetsForeignCurrencyTranslation | 
| Net | 424us-gaap_FiniteLivedIntangibleAssetsNet | 548us-gaap_FiniteLivedIntangibleAssetsNet | 
| Trademarks [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 
91us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember  | 
        
82us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember  | 
      
| Accumulated Amortization | 
(38)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember  | 
        
(17)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember  | 
      
| Foreign Currency Translation | 
(4)jcs_FiniteLivedIntangibleAssetsForeignCurrencyTranslation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember  | 
        
(11)jcs_FiniteLivedIntangibleAssetsForeignCurrencyTranslation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember  | 
      
| Net | 
49us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember  | 
        
54us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember  | 
      
| Customer Relationships [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 
491us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember  | 
        
491us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember  | 
      
| Accumulated Amortization | 
(159)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember  | 
        
(73)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember  | 
      
| Foreign Currency Translation | 
(26)jcs_FiniteLivedIntangibleAssetsForeignCurrencyTranslation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember  | 
        
(43)jcs_FiniteLivedIntangibleAssetsForeignCurrencyTranslation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember  | 
      
| Net | 
306us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember  | 
        
375us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember  | 
      
| Technology [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 
229us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_UnpatentedTechnologyMember  | 
        
229us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_UnpatentedTechnologyMember  | 
      
| Accumulated Amortization | 
(149)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_UnpatentedTechnologyMember  | 
        
(68)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_UnpatentedTechnologyMember  | 
      
| Foreign Currency Translation | 
(11)jcs_FiniteLivedIntangibleAssetsForeignCurrencyTranslation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_UnpatentedTechnologyMember  | 
        
(42)jcs_FiniteLivedIntangibleAssetsForeignCurrencyTranslation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_UnpatentedTechnologyMember  | 
      
| Net | 
$ 69us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_UnpatentedTechnologyMember  | 
        
$ 119us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_UnpatentedTechnologyMember  | 
      
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- Definition 
          Finite-Lived Intangible Assets, Foreign Currency Translation No definition available. 
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- Definition 
          Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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