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Equity Incentive Plans and Employee Stock Purchase Plan (Tables)
 9 Months Ended
Oct. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of stock option activity
The following table summarizes stock option activity for the nine months ended October 31, 2021 (in thousands, except share and per share data and years):
Shares
Weighted-
Average
Exercise
Price Per
Share
Weighted-
Average
Remaining
Contractual
Term
(In Years)
Aggregate
Intrinsic
Value
Balance - January 31, 20213,881,545 $7.50 4.8$1,405,540 
Stock options exercised(986,002)7.73 
Stock options forfeited and expired
(9,982)10.95 
Balance - October 31, 20212,885,561 $7.41 4.1$1,482,829 
Vested and exercisable - January 31, 20213,566,091 $7.22 4.7$1,292,303 
Vested and exercisable - October 31, 20212,884,486 $7.40 4.1$1,482,299 
Schedule of restricted stock unit activity
The following table summarizes RSU activity for the nine months ended October 31, 2021:
Shares
Weighted-Average Grant Date Fair Value per RSU
Unvested - January 31, 20213,473,512 $139.68 
RSUs granted1,422,325 386.88 
RSUs vested(1,070,507)142.93 
RSUs forfeited and canceled(335,347)182.95 
Unvested - October 31, 20213,489,983 $235.27 
Schedule of stock-based compensation expense recognized in consolidated statements of operations
Total stock-based compensation expense recognized in the Company’s unaudited condensed consolidated statements of operations is as follows (in thousands):
Three Months Ended October 31,Nine Months Ended October 31,
2021202020212020
Cost of revenue—subscription
$3,934 $2,446 $10,322 $6,508 
Cost of revenue—services
1,521 1,5134,473 4,142
Sales and marketing
24,790 14,69664,749 38,754
Research and development
29,205 15,44273,227 41,415
General and administrative
9,258 5,85524,556 17,225
Total stock-based compensation expense
$68,708 $39,952 $177,327 $108,044