Quarterly report pursuant to Section 13 or 15(d)

Cover �
- Document and Entity Information
Financial Statements �
Notes to Financial Statements �
Accounting Policies �
- Basis of Presentation, Significant Accounting Policies and Going Concern (Policies)
Notes Tables �
Notes Details �

Commitments and Contingencies (Details)

v3.25.0.1

Commitments and Contingencies (Details) - USD ($)								1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
Commitments and Contingencies (Details) - USD ($)	Sep. 27, 2024	Sep. 26, 2024	Sep. 09, 2024	Aug. 18, 2024	Mar. 13, 2024	Dec. 07, 2023	Feb. 03, 2020	Aug. 31, 2024	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024	Jan. 30, 2025	Dec. 07, 2022
Commitments and Contingencies
Services fee													$ 2,500,000
Services fee cap threshold incremental percentage													3.50%
Services fee cap incremental percentage													1.75%
Loss contingency, damages sought, value	$ 25,000,000	$ 700,000			$ 24,500,000
Class action in the U.S. district court for the central district of california
Commitments and Contingencies
Accrued legal fees												$ 1,200,000
Suit made by bibiyan law group
Commitments and Contingencies
Loss contingency, number of days to accept the claim								65 days
Cal Microturbine
Commitments and Contingencies
Loss contingency, damages sought, value			$ 20,000,000	$ 18,800,000
Capstone turbine corporation \| Lawsuit filed against former distributor, turbine international, LLC
Commitments and Contingencies
Loss contingency, damages sought, value							$ 4,800,000
Purchase commitment
Commitments and Contingencies
Commitment to purchase inventories									$ 23,800,000	$ 23,800,000	$ 23,800,000
Reorganized PrivateCo \| Reorganized PrivateCo Services Agreement
Commitments and Contingencies
Percentage of PrivateCo's income						90.00%
Other income									$ 400,000	$ 1,700,000
Reorganized PrivateCo \| Trademark License Agreement
Commitments and Contingencies
Annual royalty payment						$ 100,000
Related Party \| Service Agreement With CFGI
Commitments and Contingencies
Service fees											1,200,000
Payment for service fees											900,000
Payment for commission compensation											$ 16,000

- Definition

Accrued Legal Fees.

+ References

No definition available.

+ Details

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Namespace Prefix:	cgrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of annual expense related to royalty payments under a Trademark License Agreement (the "Trademark License Agreement") by and between Reorganized PrivateCo, as licensor, and the Company, as licensee. The Trademark License Agreement provides that, among other things, Reorganized PrivateCo grants the Company a non-exclusive, royalty-bearing, non-transferable, non-sublicensable (except to the Company's affiliates), worldwide, perpetual (subject to the terms and conditions of the Trademark License Agreement), irrevocable (subject to the terms and conditions of the Trademark License Agreement), limited license, under all of its right, title and interest in and to the Capstone Trademarks (as defined in the Trademark License Agreement) to use the Capstone Trademarks solely in connection with the Business (as defined in the Trademark License Agreement).

+ References

No definition available.

+ Details

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Namespace Prefix:	cgrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loss Contingency, Number of Days to Accept the Claim.

+ References

No definition available.

+ Details

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Namespace Prefix:	cgrn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cash outflow for commission compensation.

+ References

No definition available.

+ Details

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Namespace Prefix:	cgrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash outflow for service fees.

+ References

No definition available.

+ Details

Name:	cgrn_PaymentForServiceFees
Namespace Prefix:	cgrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of Reorganized PrivateCo's income being a service fee paid by Reorganized PrivateCo in cash.

+ References

No definition available.

+ Details

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Namespace Prefix:	cgrn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Service agreement, services fee cap amount

+ References

No definition available.

+ Details

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Namespace Prefix:	cgrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Service agreement, services fee cap, incremental, percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	cgrn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Service agreement, services fee cap, threshold incremental, percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	cgrn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of expense incurred in the period for service fees.

+ References

No definition available.

+ Details

Name:	cgrn_ServiceFees
Namespace Prefix:	cgrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of income related to nonoperating activities, classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
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