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Revenue Recognition (Schedule Of Contract Assets And Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Opening [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	$ 326	$ 305
Contract Liabilities	663	219
Closing [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	1,103	326
Contract Liabilities	2,200	663
Increase/(Decrease) [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	777	21
Contract Liabilities	$ 1,537	$ 444

X

- Definition

Contract Receivables and Liabilities [Line Items]

+ References

No definition available.

+ Details

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Namespace Prefix:	cnty_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

+ Details

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

X

- Definition

Amount of revenue recognized arising from contract liability from change in timeframe for performance obligation to be satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Details

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- Details

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