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Stockholders' Equity (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Effect on net loss	$ 339,000clir_ShareBasedCompensationEffectOnNetLoss	$ 115,000clir_ShareBasedCompensationEffectOnNetLoss
Effect on net loss per share (in dollars per share)	$ 0.04clir_ShareBasedCompensationEffectOfNetLossPerShare	$ 0.01clir_ShareBasedCompensationEffectOfNetLossPerShare
Research and development [Member]
Effect on net loss	99,000clir_ShareBasedCompensationEffectOnNetLoss / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember	42,000clir_ShareBasedCompensationEffectOnNetLoss / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember
General and administrative [Member]
Effect on net loss	$ 240,000clir_ShareBasedCompensationEffectOnNetLoss / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember	$ 73,000clir_ShareBasedCompensationEffectOnNetLoss / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember

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- Definition

The per share value of compensation cost and its effect on net loss per share.

+ References

No definition available.

+ Details

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- Definition

The effect of recognized share based compensation cost on net loss.

+ References

No definition available.

+ Details

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- Details

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- Details

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