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v3.21.2

Equity - Warrants - Exercise price and average life (Details) | 6 Months Ended
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Jun. 30, 2021 $ / shares shares
Equity |
Warrants Exercise Price (in dollars per share) | $ / shares | $ 1.80
Warrants Outstanding (in shares) | 0
Number Of Warrants redeemed | 37,500
Number of Warrants expired | 42,500

X
- Definition Number of class of warrant or right redeemed. + References No definition available. + Details
Name: | clir_NumberOfWarrantOrRightRedeemed
Namespace Prefix: | clir_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Warrants expired. + References No definition available. + Details
Name: | clir_NumberOfWarrantsExpired
Namespace Prefix: | clir_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price of the warrants. + References No definition available. + Details
Name: | clir_WarrantsExercisePrice
Namespace Prefix: | clir_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_StockholdersEquityNoteAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration