Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Thousands	4 Months Ended	12 Months Ended				24 Months Ended
	Jan. 31, 2015 USD ($) Supplier $ / shares shares	Jan. 30, 2017 USD ($)	Jan. 30, 2016 USD ($) Supplier $ / shares shares	Sep. 30, 2014 USD ($) Supplier $ / shares shares	Sep. 30, 2013 USD ($) Supplier $ / shares shares	Sep. 30, 2013 USD ($)	Nov. 01, 2012 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Cash overdraft	$ 2,427		$ 2,150	$ 7,811
Maturity of cash and cash equivalents			Three months or less
Legal costs incurred in connection with a lawsuit	3,354
Write-downs of intangible assets	3,354			3	$ 32
Aggregate amortization expense of intangible assets	111		$ 122	240	149
Amortization of deferred financing costs	66		166	198	203
Loss on extinguishment of debt					9
Deferred financing costs			1,145
Payments of Financing Costs			157		927
Advertising expenses, including Internet advertising expenses	$ 7,949		$ 15,877	$ 18,187	$ 16,984
Options and unvested restricted stock | shares	1,068,000		901,000	201,000	196,000
Average shares outstanding—Diluted | shares	13,541,000		13,596,000	13,572,000	13,439,000
Company paid cash dividends	$ 2,717		$ 11,026	$ 10,772	$ 9,799
Company paid cash dividends on per share | $ / shares	$ 0.20		$ 0.80	$ 0.7875	$ 0.725
Interest paid, including payments made on interest rate swap agreement	$ 112		$ 1,404	$ 211	$ 360
Income tax paid, net of refunds	$ 51		$ (5,347)	$ 8,460	$ 16,188
No single provider | Supplier	0		0	0	0
Supplier Concentration Risk | Cost of Goods
Summary Of Significant Accounting Policies [Line Items]
Percentage of contribution	10.00%		10.00%	10.00%	10.00%
Grow New Jersey Assistance Program (Grow NJ)
Summary Of Significant Accounting Policies [Line Items]
Government incentive assistance program award period			10 years
Pro Forma
Summary Of Significant Accounting Policies [Line Items]
Average shares outstanding—Diluted | shares	13,596,000		13,624,000
Revolving Credit Facility
Summary Of Significant Accounting Policies [Line Items]
Deferred financing costs							$ 2,245
Payments of Financing Costs			$ 157			$ 988
Revolving Credit Facility | Scenario Forecast
Summary Of Significant Accounting Policies [Line Items]
Payments of Financing Costs		$ 1,100
Revolving Credit Facility | Term Loan | Scenario Forecast
Summary Of Significant Accounting Policies [Line Items]
Payments of Financing Costs		$ 810
Furniture And Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Service lives of assets			5 years
Furniture And Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Service lives of assets			10 years
Retail Locations
Summary Of Significant Accounting Policies [Line Items]
Impairment write-downs of property, plant and equipment	$ 1,090		$ 1,659	$ 1,136	$ 754