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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	2clro_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPlans
Options, grants in period, gross	193,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Share-based payment award, expiration period	10 years
Share-based payment award, options, outstanding, number	1,040,081us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber					1,111,274us-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				1,066,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member	1,248,250us-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		300,494us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member	637,089us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member
Share-based payment award, number of shares authorized	2,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member
Share-based payment award, options, outstanding, number	346,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = clro_IncentivePlan1998Member
Number of options authorized and unissued	0clro_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	2,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = clro_EquityIncentivePlan2007Member
Share-based payment award, options, outstanding, number	694,081us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = clro_EquityIncentivePlan2007Member
Number of options authorized and unissued	95,915clro_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedAndUnissued / us-gaap_PlanNameAxis = clro_EquityIncentivePlan2007Member

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans

+ References

No definition available.

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- Definition

Share based Compensation Arrangement by Share based Payment Award, Number of Shares Authorized and Unissued

+ References

No definition available.

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- Definition

Number of shares for which recognition of compensation cost was accelerated.

+ References

No definition available.

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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

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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)

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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)

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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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

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-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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