XML 47 R33.htm IDEA: XBRL DOCUMENT
v3.23.1

Summary of Significant Accounting Policies - Noncontrolling interest (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2022
Variable Interest Entity [Line Items] |  |
Additional Funds Received | $ 44 |
Minority Shareholder (Member) |  |
Variable Interest Entity [Line Items] |  |
Minority shareholder ownership interest percentage |  | 1.00%

X
- Definition Amount provide funding of engineering and installation of a product for an air quality demonstration project. + References No definition available. + Details
Name: | clir_AdditionalFundsReceived
Namespace Prefix: | clir_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_OwnershipAxis=clir_MinorityShareholderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |