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Shareholders' Equity (Initial Public Offering, Preferred Stock and Common Stock, Narrative) (Details) (USD $) | 12 Months Ended | 3 Months Ended | 0 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2012 | Aug. 10, 2009
Preferred Stock [Abstract] |  |  |  |  |
Preferred stock, shares authorized | 20,000,000 us-gaap_PreferredStockSharesAuthorized |  |  |  |
Common Stock [Abstract] |  |  |  |  |
Share-based compensation | $ 761,663 us-gaap_ShareBasedCompensation | $ 674,955 us-gaap_ShareBasedCompensation | $ 636,528 us-gaap_ShareBasedCompensation |  |
Unrecognized compensation cost related to share-based payments | 1,600,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |  |  |  |
Option Exchange Program |  |  |  |  |
Common Stock [Abstract] |  |  |  |  |
Option Exchange Program, expiration date |  |  |  | May 21, 2012 |
Share-based compensation |  |  | 0 us-gaap_ShareBasedCompensation / us-gaap_PlanNameAxis = cpix_OptionExchangeProgramMember |  |
Unrecognized compensation cost related to share-based payments |  |  | 300,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_PlanNameAxis = cpix_OptionExchangeProgramMember |  |
Common stock |  |  |  |  |
Initial Public Offering [Abstract] |  |  |  |  |
Initial public offering, effective date |  |  |  |  | Aug. 10, 2009
Initial public offering, shares issued |  |  |  |  | 5,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Initial public offering, price per share |  |  |  |  | $ 17.00 cpix_StockIssuedDuringPeriodPricePerShareNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Initial public offering, gross proceeds |  |  |  |  | 85,000,000 cpix_StockIssuedDuringPeriodGrossProceedsFromInitialPublicOffering / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Initial public offering, underwriting discounts |  |  |  |  | 6,000,000 cpix_StockIssuedDuringPeriodNewSharesUnderwritingDiscounts / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Initial public offering, issuance costs |  |  |  |  | 4,200,000 us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Initial public offering, net proceeds |  |  |  |  | $ 74,800,000 us-gaap_ProceedsFromIssuanceInitialPublicOffering / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Initial public offering, number of shares common stock received in exchange for preferred stock |  |  |  |  | 2 cpix_StockIssuedInInitialPublicOfferingNumberOfSharesCommonStockReceivedForPreferredStockContemporareousWithOffering / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Stock Options | Option Exchange Program |  |  |  |  |
Common Stock [Abstract] |  |  |  |  |
Stock options forfeited |  |  |  | 424,475 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = cpix_OptionExchangeProgramMember |
Restricted Stock |  |  |  |  |
Common Stock [Abstract] |  |  |  |  |
Restricted stock granted | 219,734 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 195,925 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |
Restricted Stock | Option Exchange Program |  |  |  |  |
Common Stock [Abstract] |  |  |  |  |
Restricted stock granted |  |  |  | 147,828 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = cpix_OptionExchangeProgramMember |
Restricted Stock | Option Exchange Program | Minimum |  |  |  |  |
Common Stock [Abstract] |  |  |  |  |
Award vesting period |  |  |  | 1 year |
Restricted Stock | Option Exchange Program | Maximum |  |  |  |  |
Common Stock [Abstract] |  |  |  |  |
Award vesting period |  |  |  | 4 years |
Common stock |  |  |  |  |
Common Stock [Abstract] |  |  |  |  |
Share-based compensation, shares | 15,300 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 19,743 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 20,199 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |

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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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