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Business Segments and Major Customers (Details 2) (Customer Concentration Risk, Sales, net) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Customer A |  |  |  |
Concentration Risk |  |  |  |
Revenue from major customer as a percentage of total revenue | 38.00% | 25.00% | 38.00% | 30.00%
Customer B |  |  |  |
Concentration Risk |  |  |  |
Revenue from major customer as a percentage of total revenue |  | 25.00% |  | 11.00%
Customer C |  |  |  |
Concentration Risk |  |  |  |
Revenue from major customer as a percentage of total revenue |  | 12.00% |  |
Customer D |  |  |  |
Concentration Risk |  |  |  |
Revenue from major customer as a percentage of total revenue |  |  |  | 11.00%
Customer E |  |  |  |
Concentration Risk |  |  |  |
Revenue from major customer as a percentage of total revenue |  |  | 10.00% | 11.00%

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- Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration