Government Incentives - Additional Information (Details) - Grow New Jersey Assistance Program (Grow NJ)	12 Months Ended
	Feb. 02, 2019 USD ($) Job	Feb. 03, 2018 USD ($)	Jan. 28, 2017 USD ($)
Government Incentive Assistance Program [Line Items]
Income tax credits granted from state incentive package	$ 40,000,000
Transferrable income tax credit period	10 years
Government incentive assistance program minimum capital investment	$ 20,000,000
Government incentive assistance program maximum award limit	$ 40,000,000
Government incentive assistance program award period	10 years
Project development, eligible amount per new full time job	$ 7,000
Government incentive assistance program annual award limit	$ 4,000,000
Award compliance period	5 years
Award Compliance Description	After the end of the ten-year Grow NJ award earnings period there is a five-year compliance period during which the Company must maintain the average of its annual eligible jobs certified during the preceding ten years or a pro-rata amount up to one-tenth of the previously awarded income tax credits would be subject to recapture and repayment to the State of New Jersey annually during the five-year compliance period.
Government incentive assistance program award amount recognized net of valuation allowance	$ 2,671,000	$ 2,829,000	$ 3,251,000
Agreement to sell annual income tax credits awarded, Description	75% or more
Cash proceeds net of costs from government incentive assistance program	$ 2,829,000	$ 3,251,000	$ 3,600,000
Minimum
Government Incentive Assistance Program [Line Items]
Government incentive assistance program number of eligible jobs | Job	100