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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Feb. 02, 2020 | Feb. 03, 2019 | Jan. 28, 2018
Catalog and advertising expenses | $ 93,900,000 | $ 95,200,000 | $ 88,600,000
Shipping and processing expenses | 287,475,000 | 257,700,000 | 210,428,000
Inventory reserve for excess and obsolete items | 1,800,000 | 2,400,000 |
Depreciation and amortization | 22,083,000 | 12,594,000 | 7,330,000
Amortization expense of other assets | 100,000 | 100,000 | 100,000
Accumulated amortization of other assets | 500,000 | 400,000 |
Shipping and Handling [Member] |  |  |
Shipping and processing expenses | 31,300,000 | 31,400,000 | 28,100,000
Available-for-sale Securities [Member] |  |  |
Amortized cost of available-for-sale security |  | 6,300,000 |
Direct [Member] |  |  |
Depreciation and amortization | 10,884,000 | 4,560,000 | 2,855,000
Goodwill impairment loss | 0 | 0 | $ 0
Goodwill | $ 400,000 | $ 400,000 |
Inventory Expenditures [Member] | Supplier One [Member] |  |  |
Concentration risk, percentage | 54.00% | 52.00% | 50.00%
Inventory Expenditures [Member] | Supplier Two [Member] |  |  |
Concentration risk, percentage | 12.00% | 15.00% | 18.00%
Minimum [Member] |  |  |
Other assets amortization estimated useful life | 3 years |  |
Maximum [Member] |  |  |
Other assets amortization estimated useful life | 15 years |  |
Unvested Restricted Stock [Member] |  |  |
Stock compensation expense | $ 500,000 | $ 1,600,000 | $ 1,600,000
Unrecognized compensation expense | $ 2,000,000 |  |
Unrecognized compensation expense, weighted average recognition period | 2 years 8 months 12 days |  |
Unvested Restricted Stock [Member] | Board Members [Member] |  |  |
Stock-based compensation, vesting period | 1 year |  |
Unvested Restricted Stock [Member] | Key Employees And Executives [Member] | Minimum [Member] |  |  |
Stock-based compensation, vesting period | 3 years |  |
Unvested Restricted Stock [Member] | Key Employees And Executives [Member] | Maximum [Member] |  |  |
Stock-based compensation, vesting period | 5 years |  |

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