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Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Significant components of the entity's deferred tax assets
Net operating loss carryforwards	$ 45,060us-gaap_DeferredTaxAssetsOperatingLossCarryforwards	$ 46,144us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Depreciation, amortization and impairment of property and equipment	81cycc_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDepreciationAmortizationAndImpairmentLosses	67cycc_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDepreciationAmortizationAndImpairmentLosses
Stock options	1,815us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1,651us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Accrued expenses	179us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	3,373us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Research and development credits	4,332cycc_DeferredTaxAssetsTaxDeferredExpenseResearchAndDevelopmentCredits	4,530cycc_DeferredTaxAssetsTaxDeferredExpenseResearchAndDevelopmentCredits
Other	78us-gaap_DeferredTaxAssetsOther	82us-gaap_DeferredTaxAssetsOther
Translation adjustment		660us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses
Deferred tax assets	51,545us-gaap_DeferredTaxAssetsGross	56,507us-gaap_DeferredTaxAssetsGross
Valuation allowance for deferred tax assets	(51,545)us-gaap_DeferredTaxAssetsValuationAllowance	(56,507)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred taxes

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- Definition

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+ References

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+ References

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses on foreign currency transactions.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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