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Stock Compensation Plans (Tables)
 6 Months Ended
Jul. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Option and RSU Award Activity
The following table summarizes the stock option, restricted stock unit (“RSU”), restricted stock award (“RSA”) and performance unit (“PSU”) award activity under our 2012 Equity Incentive Plan during the six months ended July 31, 2020:
 
 Options OutstandingRSUs and PSUs
Outstanding
 SharesWeighted-
Average
Exercise
Price
Per Share		Weighted-
Average
Remaining
Contractual
Term
Aggregate
Intrinsic
Value (1)
Shares
   (in years)(in thousands) 
Balances as of January 31, 2020823,541 $10.79 6.61$118,978 13,141,650 
Additional shares authorized
Options exercised(272,932)9.78 38,203 
Options forfeited and expired(46,269)12.85 
RSUs and PSUs granted1,803,697 
RSUs and PSUs vested(2,335,433)
RSUs and PSUs forfeited and canceled(872,366)
Balances as of July 31, 2020504,340 $11.15 6.38$100,199 11,737,548 
Vested and expected to vest487,836 $11.13 6.32$96,926 10,986,938 
Exercisable as of July 31, 2020187,509 $10.94 3.47$37,292 
 _________________________
(1) The intrinsic value is calculated as the difference between the exercise price of the underlying stock option award and the closing market price of our common stock as of July 31, 2020.
Schedule of Unrecognized Compensation Costs
The following table presents unrecognized compensation cost related to stock options, RSUs, PSUs and RSAs as of July 31, 2020:
 
Unrecognized Compensation Cost
(in thousands)		Weighted-Average Remaining Period
(in years)
Stock options$30,611 2.0
RSUs1,073,071 2.7
PSUs76,358 1.3
RSAs50,779 2.0
Total unrecognized compensation cost$1,230,819 
Schedule of RSA Activity
The following table summarizes our RSA activity during the six months ended July 31, 2020:
 
 Shares
Outstanding as of January 31, 2020857,793 
RSAs vested(144,290)
RSAs forfeited and canceled(850)
Outstanding as of July 31, 2020712,653