Stock-Based Compensation - Stock Option Activity (Details) - $ / shares		9 Months Ended	12 Months Ended
		Oct. 31, 2020	Feb. 01, 2020
Number of shares
Options granted		3,185,542
Employee Stock Plan, 2006 Plan, 2016 Plan and Inducement Awards
Number of shares
Outstanding options at beginning of year		754,833
Options granted	[1]	3,185,542
Options expired and canceled		(264,146)
Outstanding options at end of quarter		3,676,229	754,833
Options exercisable at end of quarter		490,687
Weighted-average exercise price per option
Outstanding options at beginning of year		$ 4.84
Options granted	[1]	0.55
Options expired and canceled		4.85
Outstanding options at end of quarter		1.12	$ 4.84
Options exercisable at end of quarter		$ 4.83
Weighted-average remaining contractual term
Outstanding options		8 years 8 months 12 days	2 years 3 months 18 days
Options exercisable at end of quarter		2 years 9 months 18 days

[1] In the second quarter of fiscal 2020, the Company granted to Mr. Kanter a stock option to purchase 450,000 shares of the Company’s common stock, at an exercise price of $0.64 per share, which will vest over 34 months. The Company also granted stock options to purchase an aggregate of 2,735,542 shares of the Company’s common stock, at an exercise price of $0.53 per share, in connection with the time-based grant of awards under its 2020-2022 LTIP, see Note 5, Long-Term Incentive Plans.