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Subsequent Event (Details) (Astellas Pharma US, Inc., Subsequent Event, USD $) In Millions, unless otherwise specified | 0 Months Ended
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Feb. 28, 2014
Astellas Pharma US, Inc. | Subsequent Event |
Subsequent Event [Line Items] |
Upfront payment to acquired product rights | $ 2.0
Potential milestone payment due on first anniversary | $ 2.0

X
- Definition Revenue Recognition, Potential Payment Related to Product Sales Milestones Reached + References No definition available. + Details
Name: | cpix_RevenueRecognitionPotentialPaymentRelatedtoProductSalesMilestonesReached
Namespace Prefix: | cpix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Revenue Recognition, Potential Upfront Payment Related to Product Sales + References No definition available. + Details
Name: | cpix_RevenueRecognitionPotentialUpfrontPaymentRelatedtoProductSales
Namespace Prefix: | cpix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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