Consolidated Balance Sheets (Parenthetical) - $ / shares	May 02, 2020	Feb. 01, 2020	May 04, 2019
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0	0
Preferred stock, shares outstanding (in shares)	0	0	0
Common stock (Class A), $0.001 par value; 100,000 shares authorized; 22,363, 22,323 and 21,816 shares issued and outstanding, respectively
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000	100,000,000
Common stock, shares issued (in shares)	21,536,000	14,927,000	14,357,000
Common stock, shares outstanding (in shares)	21,536,000	14,927,000	14,357,000
Common stock (Class B), $0.001 par value; 35,000 shares authorized; 7,366, 7,406 and 7,706 shares issued and outstanding, respectively
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	35,000,000	35,000,000	35,000,000
Common stock, shares issued (in shares)	7,944,000	14,188,000	14,488,000
Common stock, shares outstanding (in shares)	7,944,000	14,188,000	14,488,000