Annual report [Section 13 and 15(d), not S-K Item 405]

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 - Related Party Transactions (Details)

v3.25.2

Commitments and Contingencies - Related Party Transactions (Details) $ in Thousands		12 Months Ended
	Dec. 07, 2023 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Selling, General and Administrative Expense
Selling, general and administrative		$ 26,205	$ 32,175
Affiliated Entity
Selling, General and Administrative Expense
Percentage of PrivateCo's income (as a percent)	90
Other income		2,500	700
Affiliated Entity \| Capstone Green Energy Corporation (Reorganized PrivateCo)
Selling, General and Administrative Expense
Related party transaction, annual royalty payment	$ 100
Affiliated Entity \| Capstone Green Energy LLC (Operating Subsidiary)
Selling, General and Administrative Expense
Services fee	$ 2,500
Services fee cap threshold incremental percentage (as a percent)	3.50%
Services fee cap incremental percentage (as a percent)	1.75%
Immediate Family Member of Management or Principal Owner
Selling, General and Administrative Expense
Selling, general and administrative		1,300	$ 300
Related party transaction, estimated potential bonus		$ 65

- Definition

Percentage of Reorganized Private Co Income Being a Service Fee Paid In Cash

+ References

No definition available.

+ Details

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- Definition

Related Party Transaction, Annual Royalty Payment

+ References

No definition available.

+ Details

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- Definition

Related Party Transaction, Estimated Potential Bonus

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Service Agreement, Services Fee Cap, Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	cgeh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Service Agreement, Services Fee Cap, Incremental, Percentage

+ References

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- Definition

Service Agreement, Services Fee Cap, Threshold Incremental, Percentage

+ References

No definition available.

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Namespace Prefix:	cgeh_
Data Type:	dtr-types:percentItemType
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- 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

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- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

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- References

No definition available.

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- Details

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- Details

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