Summary of Significant Accounting Policies - Additional Information (Details)	4 Months Ended	12 Months Ended
	Jan. 31, 2015 USD ($) Supplier $ / shares shares	Jan. 28, 2017 USD ($) Supplier shares	Jan. 30, 2016 USD ($) Supplier $ / shares shares	Sep. 30, 2014 USD ($) Supplier $ / shares shares	Nov. 01, 2012 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Cash overdraft		$ 2,831,000	$ 2,150,000
Maturity of cash and cash equivalents		Three months or less
Legal costs incurred in connection with a lawsuit	$ 3,354,000
Write-downs of intangible assets	3,354,000	$ 6,000	3,000
Aggregate amortization expense of intangible assets	111,000	142,000	122,000	$ 240,000
Amortization of deferred financing costs	66,000	328,000	166,000	198,000
Deferred financing costs		1,173,000
Payments of Financing Costs		1,519,000	157,000
Advertising expenses, including Internet advertising expenses	$ 7,949,000	$ 12,869,000	$ 15,877,000	$ 18,187,000
Options and unvested restricted stock | shares	1,068,000	1,232,000	901,000	201,000
Average shares outstanding—Diluted | shares	13,541,000	13,702,000	13,596,000	13,572,000
Company paid cash dividends	$ 2,717,000	$ 0	$ 11,026,000	$ 10,772,000
Company paid cash dividends on per share | $ / shares	$ 0.20		$ 0.80	$ 0.7875
Dividends forfeited		18,000
Interest paid, including payments made on interest rate swap agreement	$ 112,000	3,063,000	$ 1,404,000	$ 211,000
Income tax paid, net of refunds	$ 51,000	$ (324,000)	$ (5,347,000)	$ 8,460,000
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%
Pro Forma
Summary Of Significant Accounting Policies [Line Items]
Average shares outstanding—Diluted | shares	13,596,000	13,720,000	13,624,000
Grow New Jersey Assistance Program (Grow NJ)
Summary Of Significant Accounting Policies [Line Items]
Government incentive assistance program award period		10 years	10 years
Revolving Credit Facility
Summary Of Significant Accounting Policies [Line Items]
Deferred financing costs					$ 2,664,000
Payments of Financing Costs		$ 1,519,000	$ 157,000
Revolving Credit Facility | Term Loan
Summary Of Significant Accounting Policies [Line Items]
Payments of Financing Costs		$ 810,000
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 and equipment	$ 1,090,000	$ 2,382,000	$ 1,659,000	$ 1,136,000
Orchestra-Premaman S.A.
Summary Of Significant Accounting Policies [Line Items]
Date of merger agreement		Dec. 19, 2016