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Segments and Major Customers (Details 2) (Customer Concentration Risk, Sales, net) | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Customer A |  |
Concentration Risk |  |
Revenue from major customer as a percentage of total revenue | 33.00% | 37.00%
Customer B |  |
Concentration Risk |  |
Revenue from major customer as a percentage of total revenue | 15.00% |
Customer C |  |
Concentration Risk |  |
Revenue from major customer as a percentage of total revenue |  | 13.00%
Customer D |  |
Concentration Risk |  |
Revenue from major customer as a percentage of total revenue | 10.00% | 10.00%

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

X
- 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