Government Incentives - Additional Information (Details) - Grow New Jersey Assistance Program (Grow NJ)	1 Months Ended		12 Months Ended
	May 31, 2016 USD ($)	Sep. 30, 2015 USD ($) Job	Jan. 28, 2017 USD ($) Job	Jan. 30, 2016 USD ($)
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	10 years
Project development, eligible amount per new full time job			$ 7,000
Government incentive assistance program annual award limit			$ 4,000,000
Number of certified eligible jobs | Job		600
Capital investment		$ 50,000,000
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.
Agreement to sell annual income tax credits awarded, Description			75% or more
Government incentive assistance program award amount recognized net of valuation allowance			$ 3,251,000	$ 3,600,000
Cash proceeds net of costs from government incentive assistance program	$ 3,600,000
Income tax credits earned from state incentive package				4,000,000
Cost reduction related to award			3,251,000	3,600,000
Cost reduction related to award amount recognized in income statement			3,189,000	2,852,000
Offset to cost of goods sold			2,287,000	1,846,000
Offset to selling general and administrative expenses			902,000	1,006,000
Reduction in inventory overhead			$ 810,000	$ 748,000
Minimum
Government Incentive Assistance Program [Line Items]
Government incentive assistance program number of eligible jobs | Job			100