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Business Combination, Goodwill and Intangibles - Intangibles (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Total finite and indefinite-lived intangible assets, gross | $ 11,070 clro_FiniteAndIndefiniteLivedIntangibleAssetsGross |  | $ 11,070 clro_FiniteAndIndefiniteLivedIntangibleAssetsGross
Accumulated amortization | (3,489)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization |  | (3,174)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Intangible assets, net (excluding goodwill) | 7,581 us-gaap_IntangibleAssetsNetExcludingGoodwill |  | 7,896 us-gaap_IntangibleAssetsNetExcludingGoodwill
Amortization of Intangible Assets | 315 us-gaap_AmortizationOfIntangibleAssets | 169 us-gaap_AmortizationOfIntangibleAssets |
Tradename |  |  |
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Finite-lived intangible assets, useful life (in years) | 7 years |  |
Finite-lived intangible assets, gross | 555 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember |  | 555 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember
Patents and technological know-how |  |  |
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Finite-lived intangible assets, gross | 5,850 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = clro_PatentsAndTechnologyMember |  | 5,850 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = clro_PatentsAndTechnologyMember
Proprietary Software [Member] |  |  |
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Finite-lived intangible assets, gross | 4,341 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = clro_ProprietarySoftwareMember |  | 4,341 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = clro_ProprietarySoftwareMember
Other |  |  |
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Finite-lived intangible assets, useful life (in years) | 5 years |  |
Finite-lived intangible assets, gross | $ 324 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherCreditDerivativesMember |  | $ 324 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherCreditDerivativesMember
Minimum [Member] | Computer Software, Intangible Asset [Member] |  |  |
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Finite-lived intangible assets, useful life (in years) | 3 years |  |
Minimum [Member] | Tradename |  |  |
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Finite-lived intangible assets, useful life (in years) | 5 years |  |
Maximum [Member] | Computer Software, Intangible Asset [Member] |  |  |
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Finite-lived intangible assets, useful life (in years) | 15 years |  |

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- 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) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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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 -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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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 -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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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. + Details
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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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