XML 29 R31.htm IDEA: XBRL DOCUMENT v3.20.1
Stock-Based Compensation (Tables)
 12 Months Ended
Jan. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Options Activity The following table summarizes the activity related to the Company's stock options:
Options Outstanding
Outstanding Stock OptionsWeighted-Average Exercise PriceWeighted-Average Remaining Contractual Life (in years)Aggregate Intrinsic Value
(in thousands)
Balance, January 31, 2019
15,977,235  $6.54  6.40$144,934  
Granted—  $—  
Exercised(3,307,708) $4.49  
Forfeited or canceled(298,273) $7.72  
Balance, January 31, 2020
12,371,254  $7.05  5.53$98,028  
Vested and expected to vest12,365,021  $7.05  5.53$97,981  
Exercisable at January 31, 2020
10,249,816  $6.63  5.19$85,635  
Schedule of Nonvested Share Activity
Nonvested option activity is as follows:
OptionsWeighted-Average Grant Date Fair Value
Nonvested as of January 31, 2019
5,023,782  $4.35  
Granted—  $—  
Vested(2,604,077) $3.99  
Forfeited(298,267) $4.03  
Balance as of January 31, 2020
2,121,438  $4.83  
Schedule of Nonvested RSU Activity The following table summarizes the activity related to the Company's restricted stock and restricted stock units:
OutstandingWeighted-Average Grant Date Fair Value
Balance as of January 31, 2019
7,703,705  $16.07  
Granted6,770,144  $18.71  
Vested and converted to shares(2,962,280) $16.04  
Forfeited or canceled(1,600,840) $18.81  
Balance as of January 31, 2020
9,910,729  $17.44  
Schedule of Employee Stock Purchase Plan Valuation Assumptions
The Black-Scholes option-pricing model assumptions used to calculate the fair value of shares estimated to be purchased at commencement of an ESPP offering period were as follows:
Fiscal year ended January 31,
202020192018
Expected life (years)0.500.500.92
Expected volatility
42.41% - 60.86%
34.41% - 45.09%
38.30%  
Dividend yield0.00%  0.00%  0.00%  
Risk-free rate
1.93% - 2.52%
1.95% - 2.35%
1.02%  
Schedule of Share-Based Compensation Expense
The Company's stock-based compensation expense for the periods presented was as follows:
Fiscal year ended January 31,
(in thousands)202020192018
Cost of revenue$4,115  $2,915  $1,459  
Sales and marketing31,421  22,519  11,121  
Research and development13,212  8,475  3,756  
General and administrative19,022  10,324  6,024  
Total stock-based compensation expense$67,770  $44,233  $22,360