Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Option Activity (Detail)

v3.20.1
Stockholders' Equity - Stock Option Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Equity [Abstract]    
Shares, Outstanding at beginning of period 4,124,202  
Shares, Granted 1,555,000  
Shares, Exercised (195,461)  
Shares, Forfeited (2,715,275)  
Shares, Outstanding at end of period 2,768,466 4,124,202
Shares, Vested and expected to vest at end of period 2,552,241  
Shares, Options exercisable at end of period 677,220  
Weighted Average Exercise Price, Outstanding at beginning of period $ 3.28  
Weighted Average Exercise Price, Granted 1.94  
Weighted Average Exercise Price, Exercised 3.04  
Weighted Average Exercise Price, Forfeited 2.72  
Weighted Average Exercise Price, Outstanding at end of period 2.14 $ 3.28
Weighted Average Exercise Price, Vested and expected to vest at end of period 2.09  
Weighted Average Exercise Price, Options exercisable at end of period $ 2.67  
Weighted Average Remaining Contractual Term, Outstanding at beginning of period 8 years 10 days 6 years 11 months 16 days
Weighted Average Remaining Contractual Term, Vested and expected to vest at end of period 8 years 6 months 7 days  
Weighted Average Remaining Contractual Term, Options exercisable at end of period 6 years 2 months 4 days  
Aggregate Intrinsic Value, Outstanding $ 32,000  
Aggregate Intrinsic Value, Outstanding 6,430,232 $ 32,000
Aggregate Intrinsic Value, Vested and expected to vest at end of period 6,018,110  
Aggregate Intrinsic Value, Options exercisable at end of period $ 1,271,367