Other Assets - Narrative (Detail)	3 Months Ended
	Aug. 02, 2015 USD ($) Contract	Nov. 02, 2014 USD ($)	Aug. 03, 2014 USD ($) Contract	May. 03, 2015 USD ($) Contract	May. 16, 2014 USD ($)
Other Assets [Line Items]
Gross carrying amount of non-compete agreement	$ 2,000,000		$ 2,000,000	$ 2,000,000
Gross carrying amount of customer relationships	$ 868,000		$ 868,000	$ 868,000
Number of life insurance contracts owned | Contract	1		2	1
Life insurance contracts, death benefits to insured	$ 1,400,000		$ 3,900,000	$ 1,400,000
Life insurance contracts, cash surrender value	$ 339,000		640,000	339,000
Death benefits to beneficiary of insured on terminated life insurance agreement					$ 2,500,000
Collection of cash surrender value from termination of split dollar life insurance agreement		$ 320,000
Non-compete Agreement [Member]
Other Assets [Line Items]
Useful life	15 years
Accumulated amortization	$ 1,100,000		1,000,000	1,100,000
Amortization expense	19,000		19,000
Remaining amortization expense for the fiscal year	56,000
Remaining amortization expense for the second fiscal year	75,000
Remaining amortization expense for the third fiscal year	75,000
Remaining amortization expense for the fourth fiscal year	75,000
Remaining amortization expense for the fifth fiscal year	75,000
Remaining amortization expense for the fiscal year thereafter	$ 604,000
Weighted average remaining amortization period	12 years 9 months 18 days
Customer Relationships [Member]
Other Assets [Line Items]
Useful life	17 years
Accumulated amortization	$ 115,000		64,000	$ 102,000
Amortization expense	13,000		$ 13,000
Remaining amortization expense for the fiscal year	38,000
Remaining amortization expense for the second fiscal year	51,000
Remaining amortization expense for the third fiscal year	51,000
Remaining amortization expense for the fourth fiscal year	51,000
Remaining amortization expense for the fifth fiscal year	51,000
Remaining amortization expense for the fiscal year thereafter	$ 511,000
Weighted average remaining amortization period	14 years 9 months 18 days