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Segment, Customer and Geographic Information (Tables) | 3 Months Ended
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Mar. 31, 2015
Customers that Accounted for More Than Ten Percent of Total Product Revenue | The Company had the following significant customers that accounted for more than 10% of the Company’s total product revenue, all of which operate in a country outside of the United States of America, during the three months ended March 31, 2015 and 2014 (in percentages):
|  | Three Months Ended |
|  | March 31, |
|  | 2015 |  |  | 2014 |
Etablissement Francais du Sang |  |  | 26 | % |  |  | 23 | %
Grifols |  |  | * |  |  |  | 19 | %
* | Represents an amount less than 10% of product revenue.

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- Definition Customers that accounted for more than ten percentage of company's total product revenue. + References No definition available. + Details
Name: | cers_CustomersThatAccountedForMoreThanTenPercentageOfCompanysProductRevenueTableTextBlock
Namespace Prefix: | cers_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration