Quarterly report pursuant to Section 13 or 15(d)

Net (Loss) Income Per Share - Additional Information (Details)

v3.21.2
Net (Loss) Income Per Share - Additional Information (Details) - shares
3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares excluded from net loss per share (in shares) 53,071,000 7,600,000 53,071,000 157,782,000
Stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares excluded from net loss per share (in shares) 46,811,000 0 46,811,000 47,243,000
Chief Executive Officer | Stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares excluded from net loss per share (in shares)     4,637,333 6,956,000