LONG-TERM DEBT AND NOTE PAYABLE - Credit Agreement, Amended ABL Facility, Debt Covenants, Deferred Finance Costs, and Insurance Note Payable (Details)	6 Months Ended		12 Months Ended
	Apr. 30, 2017 USD ($)	May 01, 2016 USD ($)	Apr. 30, 2017 USD ($)	Oct. 30, 2016 USD ($)
Line of Credit Facility [Line Items]
Note payable	$ 1,373,000		$ 1,373,000	$ 460,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Revolving loans outstanding	0		0	0
ABL Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity, line of credit (up to)	10,000,000		10,000,000	9,100,000
Remaining borrowing capacity on line of credit	139,900,000		139,900,000	140,900,000
Minimum borrowing capacity for line of credit	21,000,000		$ 21,000,000	$ 21,100,000
Consolidated total net debt to EBITDA leverage ratio			3.43	2.86
ABL Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity, line of credit (up to)	$ 150,000,000		$ 150,000,000
Unused commitment fee	0.50%
Credit Agreement
Line of Credit Facility [Line Items]
Term loan principal amount	$ 250,000,000		$ 250,000,000
Installment payment as a percentage of principal	100.00%
Adjusted LIBOR floor rate (not less than)	1.00%
Borrowing margin percentage	3.25%
Alternate base rate percentage	2.25%
Debt instrument, interest rate, stated percentage	4.25%		4.25%	4.25%
Voluntary prepayment on debt	$ 10,000,000	$ 20,000,000
Minimum | ABL Facility
Line of Credit Facility [Line Items]
Fixed charge coverage ratio	1
Minimum | Base Rate | ABL Facility
Line of Credit Facility [Line Items]
Line of credit interest rate at period end	0.75%		0.75%
Minimum | London Interbank Offered Rate (LIBOR) | ABL Facility
Line of Credit Facility [Line Items]
Line of credit interest rate at period end	1.75%		1.75%
Maximum | Base Rate | ABL Facility
Line of Credit Facility [Line Items]
Line of credit interest rate at period end	1.25%		1.25%
Maximum | London Interbank Offered Rate (LIBOR) | ABL Facility
Line of Credit Facility [Line Items]
Line of credit interest rate at period end	2.25%		2.25%
Letter of Credit | ABL Facility
Line of Credit Facility [Line Items]
Remaining borrowing capacity on line of credit	$ 30,000,000		$ 30,000,000