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Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Performance Obligation, Description of Timing |  |  | The expected duration of the performance obligation is less than one year. |
Maximum [Member] |  |  |  |
Expected duration of performance obligation |  |  | 1 year |
Contracts and contract liabilities duration period |  |  | 1 year |
Opening [Member] |  |  |  |
Contract liability | $ 1.1 | $ 0.5 | $ 1.2 | $ 0.5

X
- Definition Duration of Company's contracts and contract liabilities + References No definition available. + Details
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Balance Type: | na
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- Definition Expected Performance Obligation Duration + References No definition available. + Details
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Namespace Prefix: | cnty_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045 + Details
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Balance Type: | credit
Period Type: | duration

X
- Definition Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 + Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |