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Subsequent Event (Details) (Astellas Pharma US, Inc., Subsequent Event, USD $) In Millions, unless otherwise specified	0 Months Ended
	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