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

X

- 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

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