XML 31 R17.htm IDEA: XBRL DOCUMENT
v3.21.1

Retirement Plan | 12 Months Ended
--- | ---
Dec. 31, 2020
Retirement Plan |
Retirement Plan | Note 9 – Retirement Plan The Company has a defined contribution retirement plan covering all of its employees whereby the Company matches employee contributions up to 3% of each employee’s 2020 and 2019 earnings. The Company’s matching contribution expense totaled $51,000 and $58,000 in 2020 and 2019, respectively.

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

X
- Definition The entire disclosure for a retirement plan. + References No definition available. + Details
Name: | clir_RetirementPlanTextBlock
Namespace Prefix: | clir_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration