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