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Income Taxes (Schedule of the Components of Deferred Income Tax Benefit (Expense)) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]      
Deferred tax (expense) benefit, excluding items below $ 85,844cpix_DeferredIncomeTaxExpenseBenefitBeforeReconcilingItems $ 60,739cpix_DeferredIncomeTaxExpenseBenefitBeforeReconcilingItems $ (11,562)cpix_DeferredIncomeTaxExpenseBenefitBeforeReconcilingItems
Inventory (83,418)cpix_DeferredIncomeTaxExpenseBenefitInventoryWriteDowns 310,477cpix_DeferredIncomeTaxExpenseBenefitInventoryWriteDowns 179,755cpix_DeferredIncomeTaxExpenseBenefitInventoryWriteDowns
Operating loss carryforwards 17,424cpix_DeferredIncomeTaxExpenseBenefitCreationUtilizationOfOperatingLossCarryforwards 788,342cpix_DeferredIncomeTaxExpenseBenefitCreationUtilizationOfOperatingLossCarryforwards 25,552cpix_DeferredIncomeTaxExpenseBenefitCreationUtilizationOfOperatingLossCarryforwards
Tax credit carryforwards 43,398cpix_DeferredIncomeTaxExpenseBenefitCreationUtilizationOfTaxCreditCarryforwards 196,631cpix_DeferredIncomeTaxExpenseBenefitCreationUtilizationOfTaxCreditCarryforwards 108,699cpix_DeferredIncomeTaxExpenseBenefitCreationUtilizationOfTaxCreditCarryforwards
Valuation allowance due to changes in net deferred tax asset balances (20,457)cpix_DeferredIncomeTaxExpenseBenefitChangeInValuationAllowanceDueToChangesInNetDeferredTaxAssetBalances (23,299)cpix_DeferredIncomeTaxExpenseBenefitChangeInValuationAllowanceDueToChangesInNetDeferredTaxAssetBalances (15,291)cpix_DeferredIncomeTaxExpenseBenefitChangeInValuationAllowanceDueToChangesInNetDeferredTaxAssetBalances
Deductible equity awards 298,039cpix_DeferredIncomeTaxExpenseBenefitCompensationAndBenefitsShareBasedCompensationCost 127,308cpix_DeferredIncomeTaxExpenseBenefitCompensationAndBenefitsShareBasedCompensationCost 667,171cpix_DeferredIncomeTaxExpenseBenefitCompensationAndBenefitsShareBasedCompensationCost
Allowance for accounts receivable (63,438)cpix_DeferredIncomeTaxExpenseBenefitAllowanceforAccountsReceivable 161,084cpix_DeferredIncomeTaxExpenseBenefitAllowanceforAccountsReceivable (18,615)cpix_DeferredIncomeTaxExpenseBenefitAllowanceforAccountsReceivable
Deferred charges 838,556cpix_DeferredIncomeTaxExpenseBenefitDeferredCharges 83,755cpix_DeferredIncomeTaxExpenseBenefitDeferredCharges 19,339cpix_DeferredIncomeTaxExpenseBenefitDeferredCharges
Reserve for expired product 217,330cpix_DeferredIncomeTaxExpenseBenefitReserveforExpiredProducts (106,554)cpix_DeferredIncomeTaxExpenseBenefitReserveforExpiredProducts (29,032)cpix_DeferredIncomeTaxExpenseBenefitReserveforExpiredProducts
Intangible assets (1,023,948)cpix_DeferredIncomeTaxExpenseBenefitIntangibleAssets (18,565)cpix_DeferredIncomeTaxExpenseBenefitIntangibleAssets (164,380)cpix_DeferredIncomeTaxExpenseBenefitIntangibleAssets
Deferred income tax benefit (expense) $ 309,330us-gaap_DeferredOtherTaxExpenseBenefit $ 1,579,918us-gaap_DeferredOtherTaxExpenseBenefit $ 761,636us-gaap_DeferredOtherTaxExpenseBenefit