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Income Taxes Income before Taxes and Components of Income Tax Expense (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]    
Domestic $ 9,615us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 8,714us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign (1,386)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (945)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Total 8,229us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 7,769us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]    
Current, U.S. Federal (2,750)us-gaap_CurrentFederalTaxExpenseBenefit (1,993)us-gaap_CurrentFederalTaxExpenseBenefit
Current, U.S. State (173)us-gaap_CurrentStateAndLocalTaxExpenseBenefit (765)us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Current, Non-U.S. (109)us-gaap_CurrentForeignTaxExpenseBenefit 144us-gaap_CurrentForeignTaxExpenseBenefit
Total current (3,032)us-gaap_CurrentIncomeTaxExpenseBenefit (2,614)us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]    
Deferred, U.S. Federal 379us-gaap_DeferredFederalIncomeTaxExpenseBenefit 202us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Deferred U.S. State 27us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (234)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Deferred foreign 401us-gaap_DeferredForeignIncomeTaxExpenseBenefit 165us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Deferred provision before change in valuation allowance 807clro_DeferredIncomeTaxExpenseBenefitBeforeValuationAllowanceDeferredTaxAssetChangeInAmount 133clro_DeferredIncomeTaxExpenseBenefitBeforeValuationAllowanceDeferredTaxAssetChangeInAmount
Change in valuation allowance (408)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount (109)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Total deferred 399us-gaap_DeferredIncomeTaxExpenseBenefit 24us-gaap_DeferredIncomeTaxExpenseBenefit
(Provision) for income taxes $ (2,633)us-gaap_IncomeTaxExpenseBenefit $ (2,590)us-gaap_IncomeTaxExpenseBenefit