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Commitments and Contingencies Gain Contingencies (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Feb. 28, 2012	Dec. 31, 2014	Jan. 31, 2007 principals
Other Litigation
Gain Contingencies
Loss contingency, estimate of possible loss		$ 1,000us-gaap_LossContingencyEstimateOfPossibleLoss / us-gaap_LossContingenciesByNatureOfContingencyAxis = clro_OtherLitigationMember
Misappropriation of Trade Secrets [Member] | Biamp
Gain Contingencies
Gain contingency, number of defendents			2clro_GainContingencyNumberOfDefendents / clro_DefendentAxis = clro_BiampMember / us-gaap_GainContingenciesByNatureAxis = clro_MisappropriationOfTradeSecretsMember
Gain (loss) related to litigation settlement	3,860us-gaap_GainLossRelatedToLitigationSettlement / clro_DefendentAxis = clro_BiampMember / us-gaap_GainContingenciesByNatureAxis = clro_MisappropriationOfTradeSecretsMember
Misappropriation of Trade Secrets [Member] | Other Defendents
Gain Contingencies
Gain contingency, unrecorded amount		7,658us-gaap_GainContingencyUnrecordedAmount / clro_DefendentAxis = clro_OtherDefendentsMember / us-gaap_GainContingenciesByNatureAxis = clro_MisappropriationOfTradeSecretsMember
Gain (loss) related to litigation settlement	$ 250us-gaap_GainLossRelatedToLitigationSettlement / clro_DefendentAxis = clro_OtherDefendentsMember / us-gaap_GainContingenciesByNatureAxis = clro_MisappropriationOfTradeSecretsMember

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- Definition

Gain Contingency, Number of Defendents

+ References

No definition available.

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- Definition

The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 30

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6397426&loc=d3e17499-108355

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- Definition

Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349



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