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Stockholders' Equity (Details 4) (USD $) | Dec. 31, 2014
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Employee Service Share-Based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized | $ 601,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Year 2015 [Member] |
Employee Service Share-Based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized | 229,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / clir_YearAxis = clir_Year2015Member
Year 2016 [Member] |
Employee Service Share-Based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized | 209,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / clir_YearAxis = clir_Year2016Member
Year 2017 [Member] |
Employee Service Share-Based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized | 153,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / clir_YearAxis = clir_Year2017Member
Year 2018 [Member] |
Employee Service Share-Based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized | $ 10,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / clir_YearAxis = clir_Year2018Member

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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