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Income Taxes - Additional Information (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Feb. 04, 2018 | Aug. 04, 2018 | Aug. 04, 2018
Income Taxes [Line Items] |  |  |
Deferred tax assets |  | $ 52,800,000 | $ 52,800,000
Deferred tax liabilities |  | 4,700,000 | 4,700,000
Deferred tax assets, valuation allowance |  | 48,100,000 | $ 48,100,000
Federal net operating loss carry forwards expiration period minimum |  |  | 2022
Federal net operating loss carry forwards expiration period maximum |  |  | 2036
Net operating loss carryforwards not subject to expiration |  | 16,300,000 | $ 16,300,000
U.S. federal corporate tax rate | 21.00% |  |
Tax expenses of other comprehensive income |  | 21,000 | 47,000
Unrecognized tax benefit |  | 2,000,000 | 2,000,000
Federal |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards |  | 141,400,000 | 141,400,000
State and Local Jurisdiction |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards |  | 89,200,000 | 89,200,000
Canada |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards |  | $ 2,800,000 | $ 2,800,000

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