Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income	Common Stock (Class A)	Common Stock (Class B)
Beginning balance (in shares) at Feb. 02, 2019						21,642	7,844
Beginning balance at Feb. 02, 2019	$ 163,327	$ 29	$ 149,737	$ 13,335	$ 226
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ 677			677
Restricted stock (in shares)	26
Taxes paid in lieu of shares issued (in shares)	(8)
Taxes paid in lieu of shares issued for stock-based compensation	$ (85)		(85)
Shares converted by founders (in shares)						138	(138)
Share-based compensation expense	$ 529		529
Employee exercises of stock options (in shares)	18
Exercises of stock options	$ 151	1	150
Net change in unrealized gain on available-for-sale securities	(69)
Ending balance (in shares) at May. 04, 2019						21,816	7,706
Ending balance at May. 04, 2019	164,530	30	150,331	14,012	157
Beginning balance (in shares) at Feb. 01, 2020						22,323	7,406
Beginning balance at Feb. 01, 2020	159,901	30	153,377	6,280	214
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(17,395)			(17,395)
Shares converted by founders (in shares)						40	(40)
Share-based compensation expense	501		501
Net change in unrealized gain on available-for-sale securities	(13)				(13)
Ending balance (in shares) at May. 02, 2020						22,363	7,366
Ending balance at May. 02, 2020	$ 142,994	$ 30	$ 153,878	$ (11,115)	$ 201