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Geographic Sales Information (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue | $ 57,909 us-gaap_SalesRevenueNet | $ 49,592 us-gaap_SalesRevenueNet
United States |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue | 39,598 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 32,292 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
All other countries |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue | $ 18,311 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = clro_RevenuefromNonUSCustomersMember | $ 17,300 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = clro_RevenuefromNonUSCustomersMember

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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