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FAIR VALUE MEASUREMENTS - Fair Value Assumptions (Details)	Mar. 31, 2022 $ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Share price (usd per share)	$ 7.59
Exercise Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants, measurement input	11.50
Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants, measurement input	0.0242
Risk-free interest rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Earnouts, measurement input	0.0241
Risk-free interest rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Earnouts, measurement input	0.0244
Expected volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants, measurement input	0.38
Earnouts, measurement input	0.700
Expected dividends
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants, measurement input	0
Earnouts, measurement input	0
Expected term
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants, measurement input	4.7
Expected term | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Earnouts, measurement input	3.7
Expected term | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Earnouts, measurement input	2.7

X

- Definition

Reverse Recapitalization, Contingent Consideration, Measurement Input

+ References

No definition available.

+ Details

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Namespace Prefix:	cmpo_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

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.

+ Details

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

X

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

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X

- Details

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Namespace Prefix:
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X

- Details

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Balance Type:
Period Type:

X

- Details

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- Details

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- Details

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- Details

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- Details

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