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v3.22.1

RETIREMENT PLAN - Defined Contribution Plan (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Defined Contribution Plan Disclosure [Line Items] |  |
Required period of service to participate in plan | 90 days |
Retirement plan expense | $ 428 | $ 303
Matching scenario one |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Employer match | 100.00% |
Employee contributions | 1.00% |
Matching scenario two |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Employer match | 50.00% |
Employee contributions | 5.00% |

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- Definition Defined Contribution Plan, Requisite Service Period + References No definition available. + Details
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Namespace Prefix: | cmpo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- 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
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |