Quarterly report pursuant to Section 13 or 15(d)

Description of Stock Plans - Summary of Stock Option Activity (Details)

v3.19.3
Description of Stock Plans - Summary of Stock Option Activity (Details) - Stock Option - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Mar. 31, 2019
Number of Shares (in shares)      
Beginning Balance (in shares) 9,128,885    
Granted (in shares) 1,603,750 1,240,425  
Forfeitures/cancellations (in shares) (384,827)    
Exercised (in shares) (1,623,000)    
Ending Balance (in shares) 8,724,808   9,128,885
Vested and expected to vest (net of estimated forfeitures) (in shares) 7,663,942    
Exercisable (in shares) 4,879,562    
Weighted Average Exercise Price ($ per share)      
Options outstanding (in dollars per share) $ 1.80    
Granted (in dollars per share) 4.07    
Forfeited/Cancelled (in dollars per share) 1.75    
Exercised (in dollars per share) 1.73    
Options outstanding (in dollars per share) 2.24   $ 1.80
Vested and expected to vest (net of estimated forfeitures) (in dollars per share) 2.19    
Exercisable (in dollars per share) $ 2.15    
Weighted Average Remaining Contractual Life (in years)      
Outstanding 7 years 3 months 10 days   7 years 3 months 21 days
Vested and expected to vest (net of estimated forfeitures) 7 years 30 days    
Exercisable, September 30, 2019 6 years 4 months 17 days    
Aggregate Intrinsic Value (in thousands)      
Outstanding $ 36,707   $ 16,347
Vested and expected to vest (net of estimated forfeitures) 32,623    
Exercisable, September 30, 2019 $ 20,978