The length of fiscal year in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	chke_LengthOfFiscalYear
Namespace Prefix:	chke_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Summary of Significant Accounting Policies (Details)	12 Months Ended
Summary of Significant Accounting Policies (Details)	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Company year end
Length of fiscal year	371 days	364 days	364 days
Minimum
Company year end
Length of fiscal year	364 days
Maximum
Company year end
Length of fiscal year	371 days