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Stockholders' Equity (Details) (Employee Stock Option [Member])
3 Months Ended
Mar. 31, 2015
Employee Stock Option [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected life 5 years 6 months 11 days
Weighted average volatility 73.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Forfeiture rate 10.00%clir_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRateOne
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Weighted average risk-free interest rate 1.39%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Expected dividend rate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember