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Fair Value of Financial Instruments (Schedule of Fair Value of Financial Instruments by Level in Hierarchy and Narrative) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	$ 14,841,418us-gaap_TradingSecurities	$ 14,019,761us-gaap_TradingSecurities
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	6,173,010us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	7,724,809us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	8,668,408us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	6,294,952us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
U.S. Treasury Notes and Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	1,338,010us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_UsTreasuryNotesAndBondsSecuritiesMember	2,829,809us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_UsTreasuryNotesAndBondsSecuritiesMember
U.S. Treasury Notes and Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	1,338,010us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_UsTreasuryNotesAndBondsSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	2,829,809us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_UsTreasuryNotesAndBondsSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
U.S. Treasury Notes and Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_UsTreasuryNotesAndBondsSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_UsTreasuryNotesAndBondsSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
U.S. Agency Issued Mortgage-backed Securities - Variable Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	4,003,375us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	3,049,754us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
U.S. Agency Issued Mortgage-backed Securities - Variable Rate | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
U.S. Agency Issued Mortgage-backed Securities - Variable Rate | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	4,003,375us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	3,049,754us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
U.S. Agency Notes and Bonds - Fixed Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	3,251,336us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_AgencySecuritiesMember	1,496,700us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_AgencySecuritiesMember
U.S. Agency Notes and Bonds - Fixed Rate | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_AgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_AgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
U.S. Agency Notes and Bonds - Fixed Rate | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	3,251,336us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_AgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	1,496,700us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_AgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
SBA Loan Pools - Variable Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	1,413,697us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_LoanPoolsMember	1,748,498us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_LoanPoolsMember
SBA Loan Pools - Variable Rate | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_LoanPoolsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_LoanPoolsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
SBA Loan Pools - Variable Rate | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	1,413,697us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_LoanPoolsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	1,748,498us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = cpix_LoanPoolsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Municipal Bonds - VRDN
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	4,835,000us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MunicipalBondsMember	4,895,000us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MunicipalBondsMember
Municipal Bonds - VRDN | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	4,835,000us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MunicipalBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	4,895,000us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MunicipalBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Municipal Bonds - VRDN | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of marketable securities	$ 0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MunicipalBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	$ 0us-gaap_TradingSecurities / us-gaap_FairValueByAssetClassAxis = us-gaap_MunicipalBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member

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Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Trading Securities

-URI http://asc.fasb.org/extlink&oid=6526789



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.4)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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