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Fixed Assets - Minimum future payments (Details)	Jun. 30, 2021 USD ($)
Payments Due Under Lease Agreement [Member]
2021 (remaining 6 months)	$ 114,000
2022	233,000
2023	136,000
2024	65,000
2025	66,000
Thereafter	118,000
Total	732,000
Discounted Lease Liabilities Payments [Member].
2021 (remaining 6 months)	96,000
2022	207,000
2023	122,000
2024	54,000
2025	59,000
Thereafter	114,000
Total	$ 652,000

X

- Definition

Amount of lessee's discounted obligation for lease payments for operating lease.

+ References

No definition available.

+ Details

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- Definition

Amount of lessee's discounted obligation for lease payments for operating lease, due after year five following latest fiscal year.

+ References

No definition available.

+ Details

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- Definition

Amount of lessee's discounted obligation for lease payments for operating lease, due in next fiscal year following latest fiscal year.

+ References

No definition available.

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- Definition

Amount of lessee's discounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.

+ References

No definition available.

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- Definition

Amount of lessee's discounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.

+ References

No definition available.

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- Definition

Amount of lessee's discounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	clir_
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- Definition

Amount of lessee's discounted obligation for lease payments for operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	clir_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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X

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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X

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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Namespace Prefix:	us-gaap_
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X

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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