Capitalization - Warrants (Details) $ in Thousands	3 Months Ended
Apr. 29, 2017 USD ($) tranche shares
Warrants
Warrants	$ 13
Warrants \| Hi-Tec License
Warrants
Warrants issued to purchase shares of common stock \| shares	120,000
Number of tranches of warrants \| tranche	5
Number of shares vest in each tranches \| shares	20,000
Initial term	5 years
Renewal period	5 years
Value of warrants until the related contingency is resolved	$ 0
Fair value of stock warrants	567
Warrants	$ 13

Amortization Adjustment Of Warrants

No definition available.

Name:	chke_AmortizationAdjustmentOfWarrants
Namespace Prefix:	chke_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The value of warrants issued to purchase common stock until the contingency related to customer license agreement renewal is resolved.

+ References

No definition available.

+ Details

Name:	chke_ClassOfWarrantOrRightValueUntilRelatedContingencyResolved
Namespace Prefix:	chke_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the initial term of warrants or rights.

+ References

No definition available.

+ Details

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

- Definition

Represents the renewal period of warrants or rights.

+ References

No definition available.

+ Details

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

- Definition

Represents the number of shares vesting in each tranche of warrants.

+ References

No definition available.

+ Details

Name:	chke_ClassOfWarrantsOrRightsVestInEachTranches
Namespace Prefix:	chke_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of tranches of warrants vesting over a period of time, excluding tranches related to potential renewal period of customer license agreement.

+ References

No definition available.

+ Details

Name:	chke_ClassOfWarrantsOrRightsVestInNumberOfTranches
Namespace Prefix:	chke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

N/A.

+ References

No definition available.

+ Details

Name:	chke_WarrantsAbstract
Namespace Prefix:	chke_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value portion of warrants not settleable in cash classified as equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

Name:	us-gaap_WarrantsNotSettleableInCashFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=chke_HiTecSalesAndLicenseAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: