Stock-Based Compensation - Stock Option Activity (Details)	6 Months Ended		12 Months Ended
	Jul. 31, 2021 USD ($) $ / shares shares		Jan. 30, 2021 USD ($) $ / shares shares
Number of shares
Options granted	1,518,154
2016 Plan
Number of shares
Outstanding options at beginning of year	3,647,581
Options granted	1,518,154	[1]
Options exercised	(7,270)
Options expired and canceled	(22,542)
Outstanding options at end of quarter	5,135,923		3,647,581
Options exercisable at end of quarter	1,266,116
2006 Plan
Number of shares
Outstanding options at end of quarter	412,826
Weighted-average exercise price per option
Outstanding options at beginning of year | $ / shares	$ 1.09
Options granted | $ / shares	0.71	[1]
Options exercised | $ / shares	0.53
Options expired and canceled | $ / shares	4.19
Outstanding options at end of quarter | $ / shares	0.96		$ 1.09
Options exercisable at end of quarter | $ / shares	$ 2.05
Weighted-average remaining contractual term
Outstanding options	8 years 6 months		8 years 6 months
Options exercisable at end of quarter	6 years 7 months 6 days
Aggregate Intrinsic Value
Outstanding options at beginning of year | $	$ 810,596
Options exercised | $	21,100
Outstanding options at end of quarter | $	20,488,700		$ 810,596
Options exercisable at end of quarter | $	$ 3,722,757

[1] Primarily represents the grant of stock options to purchase an aggregate of 1,078,913 shares of the Company’s common stock, at an exercise price of $0.69 per share, in connection with the time-based grant of awards under its 2021-2023 LTIP, see Note 5, Long-Term Incentive Plans.  In March 2021, the Company also granted to active participants of the LTIP, a discretionary grant of stock options to purchase an aggregate of 414,337 shares of the Company’s common stock, at an exercise price of $0.75 per share, which will vest ratably over 3 years