Income Taxes - Deferred Tax Effects of Temporary Differences Giving Rise to the Company's Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Feb. 03, 2018	Jan. 28, 2017
Deferred tax assets:
Net operating loss carryforwards	$ 13,840	$ 13,201
Deferred rent	5,568	9,454
Employee benefit accruals	1,873	3,041
Grow NJ award benefit, net	2,158	2,268
Depreciation and amortization	1,507
Inventory reserves	1,211	2,131
Federal tax credit carryforwards	1,494	1,247
Stock-based compensation	565	855
Other accruals	1,037	1,905
Other	1,367	1,960
Deferred tax assets (excluding state net operating loss carryforwards)	30,620	36,062
Valuation allowance	(27,425)	(30,402)
Deferred tax asset, net of valuation allowance	3,195	5,660
Deferred tax liabilities:
Depreciation and amortization		(1,860)
Prepaid expenses	(366)	(549)
Deferred tax liabilities, gross	(366)	(2,409)
Net deferred tax assets	$ 2,829	$ 3,251