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Patents and Other Intangible Assets (Details 1) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Net $ 2,372,000us-gaap_FiniteLivedIntangibleAssetsNet $ 1,459,000us-gaap_FiniteLivedIntangibleAssetsNet
Issued Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
2015 7,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clir_IssuedPatentsMember
 
2016 7,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clir_IssuedPatentsMember
 
2017 7,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clir_IssuedPatentsMember
 
2018 7,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clir_IssuedPatentsMember
 
2019 7,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clir_IssuedPatentsMember
 
Thereafter 31,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clir_IssuedPatentsMember
 
Finite-Lived Intangible Assets, Net $ 66,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clir_IssuedPatentsMember