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Income Taxes Components of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Deferred revenue, current | $ 1,120 clro_DeferredTaxAssetsDeferredIncomeCurrent | $ 971 clro_DeferredTaxAssetsDeferredIncomeCurrent
Intangibles and related other, long-term | 42 clro_DeferredTaxLiabilitiesIntangibleAssetsLongTerm |
Deferred Tax Asset, Intangible Assets, Long Term |  | 82 clro_DeferredTaxAssetIntangibleAssetsLongTerm
Deferred Tax Asset, Inventory, Current | 2,213 clro_DeferredTaxAssetInventoryCurrent | 1,955 clro_DeferredTaxAssetInventoryCurrent
Net operationg loss carryforwards, long-term | 957 clro_DeferredTaxAssetsOperatingLossCarryforwardsLongTerm | 682 clro_DeferredTaxAssetsOperatingLossCarryforwardsLongTerm
Deferred Tax Assets, Tax Credit Carryforwards, Research | 60 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch | 31 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
Accrued expenses, current | 117 clro_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilitiesCurrent | 159 clro_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilitiesCurrent
Deferred Tax Asset, Expenses Long Term | 175 clro_DeferredTaxAssetExpensesLongTerm |
Stock-based compensation, long-term | 577 clro_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCostLongTerm | 679 clro_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCostLongTerm
Allowance for sales returns and doubtful accounts, current | 22 clro_DeferredTaxAssetTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccountsCurrent | 47 clro_DeferredTaxAssetTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccountsCurrent
Difference in property and equipment basis, long-term | (318)clro_DeferredTaxAssetsPropertyPlantAndEquipmentDifferenceInBasisLongTerm | (388)clro_DeferredTaxAssetsPropertyPlantAndEquipmentDifferenceInBasisLongTerm
Other, current | 908 clro_DeferredTaxAssetOtherCurrent | 458 clro_DeferredTaxAssetOtherCurrent
Other, long-term | 2 clro_DeferredTaxAssetsOtherLongTerm | 51 clro_DeferredTaxAssetsOtherLongTerm
Total net deferred income tax assets, current | 4,380 us-gaap_DeferredTaxAssetsGrossCurrent | 3,590 us-gaap_DeferredTaxAssetsGrossCurrent
Total net deferred income tax asset, long-term | 1,495 us-gaap_DeferredTaxAssetsGrossNoncurrent | 1,137 us-gaap_DeferredTaxAssetsGrossNoncurrent
Less: Valuation allowance, current | (556)us-gaap_DeferredTaxAssetsValuationAllowanceCurrent | (265)us-gaap_DeferredTaxAssetsValuationAllowanceCurrent
Less: valuation allowance, long-term | (230)us-gaap_DeferredTaxAssetsValuationAllowanceNoncurrent | (113)us-gaap_DeferredTaxAssetsValuationAllowanceNoncurrent
Net deferred income tax asset (liability), current | 3,824 us-gaap_DeferredTaxAssetsNetCurrent | 3,325 us-gaap_DeferredTaxAssetsNetCurrent
Net deferred income tax asset (liability), long-term | $ 1,265 us-gaap_DeferredTaxAssetsNetNoncurrent | $ 1,024 us-gaap_DeferredTaxAssetsNetNoncurrent

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- Definition Deferred Tax Asset, Expenses Long Term - Long Term portion of deferred tax asset attributable to deductible temporary differences from reserves and accruals. + References No definition available. + Details
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- Definition Deferred Tax Assets, Property Plant and Equipment, Difference in Basis, Long Term + References No definition available. + Details
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