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Income Taxes - Additional Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Feb. 04, 2018
Nov. 03, 2018
Nov. 03, 2018
Income Taxes [Line Items]      
Deferred tax assets   $ 52,500,000 $ 52,500,000
Deferred tax liabilities   4,000,000 4,000,000
Deferred tax assets, valuation allowance   48,500,000 $ 48,500,000
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   16,900,000 $ 16,900,000
U.S. federal corporate tax rate 21.00%    
Tax expenses of other comprehensive income   45,000 92,000
Unrecognized tax benefit   2,000,000 2,000,000
Federal      
Income Taxes [Line Items]      
Net operating loss carryforwards subject to expiration   141,400,000 141,400,000
State and Local Jurisdiction      
Income Taxes [Line Items]      
Net operating loss carryforwards   89,300,000 89,300,000
Canada      
Income Taxes [Line Items]      
Net operating loss carryforwards   $ 2,800,000 $ 2,800,000