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Income Taxes - Income Tax Rates (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Effective tax rate, forecasted	33.30%
Effective Income Tax Rate, Continuing Operations, Forecasted Increase (Decrease) in Rate	(4.10%)
Effective Income Tax Rate, Continuing Operations	37.40%
Effective tax rate, including loss jurisdictions	37.20%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 272
Effective Tax Rate, After Discreet Benefits	31.60%

X

- Definition

This tag represents the increase or decrease between the prior period effective income tax rate and the current period forecasted effective income tax rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	clro_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Effective Tax Rate, After Discreet Benefits

+ References

No definition available.

+ Details

Name:	clro_EffectiveTaxRateAfterDiscreetBenefits
Namespace Prefix:	clro_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The forecasted effective income tax rate for the period.

+ References

No definition available.

+ Details

Name:	clro_EffectiveTaxRateForecasted
Namespace Prefix:	clro_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The forecasted effective tax rate which includes loss jurisdiction for which no benefit from forecasted current year losses is anticipated.

+ References

No definition available.

+ Details

Name:	clro_EffectiveTaxRateIncludingLossJurisdictions
Namespace Prefix:	clro_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(2))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Subparagraph 2

-Article 4



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 47

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 48

-Paragraph 21

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant