XML 41 R30.htm IDEA: XBRL DOCUMENT v3.5.0.2

Variable Interest Entity (Narrative) (Details) - entity	Oct. 30, 2016	Jan. 31, 2016
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Number of variable interest entity	1	1

X

- Definition

Number Of Variable Interest Entity

+ References

No definition available.

+ Details

Name:	dlth_NumberOfVariableInterestEntity
Namespace Prefix:	dlth_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: