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Share-Based Payments (Details) | 12 Months Ended | 6 Months Ended | 24 Months Ended | 30 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2014 plan | Jun. 30, 2005 | Jun. 30, 2003 | Dec. 31, 1999 | Jun. 30, 2002 | Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Number of share-based compensation plans | 2 clro_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPlans |  |  |  |  |
Options, grants in period, gross | 193,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |  |  |  |  |
Share-based payment award, expiration period | 10 years |  |  |  |  |
Share-based payment award, options, outstanding, number | 1,040,081 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber |  |  |  |  | 1,111,274 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Employee Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Share-based payment award, maximum employee subscription rate | 10.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember |  |  |  |  |
Employee Stock Ownership Plan (ESOP), Plan [Domain] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Number of shares contributed by employer per share of employee contributed shares | 9 |  |  |  |  |
Director and Officer |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |  |  |  |
Employee [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |  |  |  |
Incentive Plan, 1998 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Options, grants in period, gross |  |  |  | 1,066,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member | 1,248,250 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  | 9 years 9 months 18 days | 6 years |
Share-based payment award, accelerated vesting, number |  | 300,494 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member | 637,089 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member |  |  |
Share-based payment award, number of shares authorized | 2,500,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member |  |  |  |  |
Share-based payment award, options, outstanding, number | 346,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member |  |  |  |  |
Number of options authorized and unissued | 0 clro_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedAndUnissued / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member |  |  |  |  |
Equity Incentive Plan, 2007 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Share-based payment award, number of shares authorized | 2,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = clro_EquityIncentivePlan2007Member |  |  |  |  |
Share-based payment award, options, outstanding, number | 694,081 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = clro_EquityIncentivePlan2007Member |  |  |  |  |
Number of options authorized and unissued | 95,915 clro_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedAndUnissued / us-gaap_PlanNameAxis = clro_EquityIncentivePlan2007Member |  |  |  |  |

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans + References No definition available. + Details
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- Definition Share based Compensation Arrangement by Share based Payment Award, Number of Shares Authorized and Unissued + References No definition available. + Details
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- Definition Number of shares for which recognition of compensation cost was accelerated. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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