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Income Taxes (Tax Credits, Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Tax Credit Carryforward [Line Items] |  |  |
Deferred tax assets, realizability, minimum future taxable income | $ 11.3 |  |
Deferred tax assets, realizability, taxable income excluding certain tax deductions | $ (2.0) | $ 9.4 | $ 5.7

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- Definition Deferred Tax Assets, Realizability, Minimum Future Taxable Income Level + References No definition available. + Details
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Namespace Prefix: | cpix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Deferred Tax Assets, Realizability, Taxable Income Excluding Certain Tax Deductions + References No definition available. + Details
Name: | cpix_DeferredTaxAssetsRealizabilityTaxableIncomeExcludingCertainTaxDeductions
Namespace Prefix: | cpix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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