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Business Combination, Goodwill and Intangibles Intangibles (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Total finite and indefinite-lived intangible assets, gross	$ 11,070us-gaap_IntangibleAssetsGrossExcludingGoodwill	$ 5,674us-gaap_IntangibleAssetsGrossExcludingGoodwill
Accumulated amortization	(3,174)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization	(1,964)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Intangible assets, net (excluding goodwill)	7,896us-gaap_IntangibleAssetsNetExcludingGoodwill	3,710us-gaap_IntangibleAssetsNetExcludingGoodwill
Amortization of Intangible Assets	1,210us-gaap_AmortizationOfIntangibleAssets	548us-gaap_AmortizationOfIntangibleAssets
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2014	1,258us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2015	1,120us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2016	925us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2017	851us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2018	778us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter	2,964us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Finite-lived intangible assets, future amortization expense	7,896us-gaap_FiniteLivedIntangibleAssetsNet
Patents and Technology
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, gross	5,850us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = clro_PatentsAndTechnologyMember	2,070us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = clro_PatentsAndTechnologyMember
Proprietary Software
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, gross	4,341us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = clro_ProprietarySoftwareMember	2,961us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = clro_ProprietarySoftwareMember
Other
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, gross	$ 324us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherCreditDerivativesMember	$ 208us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherCreditDerivativesMember
Minimum
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, useful life (in years)	3 years
Minimum | Proprietary Software
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, useful life (in years)	3 years
Minimum | Other Intangible Assets [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, useful life (in years)	3 years
Minimum | tradename [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, useful life (in years)	5 years
Maximum
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, useful life (in years)	10 years
Maximum | Proprietary Software
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, useful life (in years)	15 years
Maximum | Other Intangible Assets [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, useful life (in years)	5 years
Maximum | tradename [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, useful life (in years)	7 years

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount before accumulated amortization of intangible assets, excluding goodwill.

+ References

No definition available.

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274



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