Income Taxes - Deferred Tax Effects of Temporary Differences Giving Rise to the Company's Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Feb. 02, 2019	Feb. 03, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 14,901	$ 13,840
Deferred rent	5,299	5,568
Depreciation and amortization	3,736	1,507
Grow NJ award benefit, net	2,038	2,158
Federal tax credit carryforwards	1,677	1,494
Employee benefits	1,349	1,211
Inventory reserves	1,213	1,873
Other accruals	1,026	1,037
Disallowed interest carryforward	1,020
Stock-based compensation	202	565
Other	1,332	1,367
Deferred tax assets (excluding state net operating loss carryforwards)	33,793	30,620
Valuation allowance	(30,639)	(27,425)
Deferred tax asset, net of valuation allowance	3,154	3,195
Deferred tax liabilities:
Prepaid expenses	(483)	(366)
Deferred tax liabilities, gross	(483)	(366)
Net deferred tax assets	$ 2,671	$ 2,829