Income Taxes (Details 5)	12 Months Ended
Jan. 31, 2015
Federal tax
Income Taxes
Period of statute of limitations	3 years
State tax
Income Taxes
Period of statute of limitations	4 years

Represents the period of statue of limitation for examination by tax authorities.

No definition available.

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