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Fixed Assets - Summary (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Right of use asset-operating leases	$ 1,024,000	$ 1,140,000
Fixed assets, gross	2,073,000	2,231,000
Accumulated depreciation and amortization	(1,657,000)	(1,566,000)
Fixed assets, net, before Construction in progress	416,000	665,000
Construction in progress	11,000
Fixed assets, net	427,000	665,000
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	720,000	762,000
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	180,000	180,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 149,000	$ 149,000

X

- Definition

Net amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount, before accumulated amortization, of right-of-use asset from operating lease.

+ References

No definition available.

+ Details

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X

- Definition

Amount, after accumulated depreciation and amortization, of property, plant, and equipment and operating lease right-of-use asset.

+ References

No definition available.

+ Details

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X

- Definition

Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from operating lease, excluding construction in progress.

+ References

No definition available.

+ Details

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X

- Definition

Amount, before accumulated depreciation and amortization, of property, plant, and equipment and operating lease right-of-use asset, excluding construction in progress .

+ References

No definition available.

+ Details

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X

- Definition

Amount, after accumulated depreciation and amortization, of property, plant, and equipment and operating lease right-of-use asset, excluding construction in progress.

+ References

No definition available.

+ Details

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Namespace Prefix:	clir_
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X

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.13)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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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.

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X

- Details

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X

- Details

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X

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