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Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details)	12 Months Ended
	Feb. 03, 2018 lease
Minimum
Minimum lease term	12 months
New Accounting Pronouncement ASU 2016-02 not yet adopted
Number of leases	549
Average remaining contractual rent period	3 years

X

- Definition

The average remaining contractual rent period in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	ctrn_LesseeLeasingArrangementsOperatingLeasesAverageRemainingContractualRentPeriod
Namespace Prefix:	ctrn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Term of the lessor's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LessorLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of units (items of property) under operating lease arrangements.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=ctrn_NewAccountingPronouncementAsu201602NotYetAdoptedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: