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New Products New Products - Narrative (Details) (USD $) | 3 Months Ended | 12 Months Ended |  |
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Oct. 29, 2013 | Feb. 28, 2014
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net product revenue |  |  |  |  |  |  |  |  | $ 36,683,762 us-gaap_SalesRevenueGoodsNet | $ 31,100,698 us-gaap_SalesRevenueGoodsNet | $ 47,944,031 us-gaap_SalesRevenueGoodsNet |  |
Net revenues | 9,329,412 us-gaap_SalesRevenueNet | 9,729,047 us-gaap_SalesRevenueNet | 9,750,168 us-gaap_SalesRevenueNet | 8,093,244 us-gaap_SalesRevenueNet | 8,159,667 us-gaap_SalesRevenueNet | 6,528,575 us-gaap_SalesRevenueNet | 7,081,088 us-gaap_SalesRevenueNet | 10,258,132 us-gaap_SalesRevenueNet | 36,901,871 us-gaap_SalesRevenueNet | 32,027,462 us-gaap_SalesRevenueNet | 48,851,237 us-gaap_SalesRevenueNet |  |
Omeclamox-Pak |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Additional upfront payments |  |  |  |  |  |  |  |  |  |  |  | 4,000,000 cpix_BusinessCombinationAggregateUpfrontPayments / us-gaap_BusinessAcquisitionAxis = cpix_OmeclamoxPakMember |
Milestone payment not required, amount |  |  |  |  |  |  |  |  | 1,000,000 cpix_ProductRIghtsAgreementMilestonePayment / us-gaap_BusinessAcquisitionAxis = cpix_OmeclamoxPakMember |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 4,100,000 us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = cpix_OmeclamoxPakMember | 1,000,000 us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = cpix_OmeclamoxPakMember |  |  |
Vaprisol |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Upfront payment |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 cpix_BusinessCombinationUpfrontPayment / us-gaap_BusinessAcquisitionAxis = cpix_VaprisolMember
Additional upfront payments |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 cpix_BusinessCombinationAggregateUpfrontPayments / us-gaap_BusinessAcquisitionAxis = cpix_VaprisolMember
Minimum | Omeclamox-Pak |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty payments based on percentage over gross profits |  |  |  |  |  |  |  |  |  |  |  | 15.00%cpix_BusinessCombinationRoyaltiesRangeofPaymentOverGrossProfitsPercentage / us-gaap_BusinessAcquisitionAxis = cpix_OmeclamoxPakMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Maximum | Omeclamox-Pak |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty payments based on percentage over gross profits |  |  |  |  |  |  |  |  |  |  |  | 20.00%cpix_BusinessCombinationRoyaltiesRangeofPaymentOverGrossProfitsPercentage / us-gaap_BusinessAcquisitionAxis = cpix_OmeclamoxPakMember / us-gaap_RangeAxis = us-gaap_MaximumMember |

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