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Stockholders' Equity (Details 6) - Consultant Plan [Member] - shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Reserved but unissued shares under the Plan, beginning of year | 99,159 | 83,633
Increases in the number of authorized shares under the Consultant Plan | 110,546 | 25,526
Stock grants | (10,000) | (10,000)
Reserved but unissued shares under the Plan, end of year | 199,705 | 99,159

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- Definition The increase in number of authorized shares under the plan during the period. + References No definition available. + Details
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Namespace Prefix: | clir_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of stock grants during the period. + References No definition available. + Details
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Namespace Prefix: | clir_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
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Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |