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Summary of Significant Accounting Policies - Disaggregation of revenue from contracts with customers (Details) | 3 Months Ended
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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%

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- 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

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- 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

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

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

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- 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: |

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

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