Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Feb. 03, 2018	Jan. 28, 2017
Deferred tax assets:
Deferred rent	$ 3,523	$ 5,343
Stock-based compensation	1,705	2,574
Accrued expenses	1,079	1,753
Inventories	1,650	2,712
Compensation and benefits	471	687
Capital lease	4	147
Deferred revenue	187	318
Tax credits	51	162
Total deferred tax assets	8,670	13,696
Deferred tax liabilities:
Property and equipment	(5,367)	(7,344)
Prepaid expenses	(526)	(606)
Marketable securities	(9)	(44)
Total deferred tax liabilities	(5,902)	(7,994)
Net deferred tax asset	$ 2,768	$ 5,702