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Income Taxes Income Tax Rates (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Income Tax Rate Disclosures [Abstract]
Effective tax rate, forecasted	35.00%
Effective Income Tax Rate, Continuing Operations, Forecasted Increase (Decrease) in Rate	1.70%
Effective Income Tax Rate, Continuing Operations		33.30%
Effective tax rate, including loss jurisdictions	43.20%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 82
Effective Tax Rate, After Discreet Benefits	41.90%

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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- Definition

Effective Tax Rate, After Discreet Benefits

+ References

No definition available.

+ Details

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Namespace Prefix:	clro_
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Balance Type:	na
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X

- Definition

The forecasted effective income tax rate for the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	clro_
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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_
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Period Type:	duration

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- Details

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to 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=26873400&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

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- 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

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