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Summary of Significant Accounting Policies - Disaggregation of revenue from contracts with customers (Details)	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	100.00%	100.00%
Camping
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	11.50%	12.40%
Clothing
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	7.30%	7.30%
Fishing
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	11.60%	11.20%
Footwear
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	6.40%	7.10%
Hunting and Shooting
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	56.20%	53.80%
Optics, Electronics, Accessories, and Other
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	7.00%	8.20%

X

- Definition

Percentage of revenue from contract with customers net of excise and sales taxes.

+ References

No definition available.

+ Details

Name:	spwh_PercentageOfRevenueFromContractWithCustomerExcludingAssessedTaxTotal
Namespace Prefix:	spwh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

X

- Details

Name:	us-gaap_ProductOrServiceAxis=spwh_CampingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=spwh_ClothingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=spwh_FishingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=spwh_FootwearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=spwh_HuntingAndShootingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=spwh_OpticsElectronicsAccessoriesAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: