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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Summary of Stock Option Activity
A summary of the Company’s stock option activity is as follows:
Number of
Shares
Weighted-
Average
Exercise per
Share Price
Weighted-Average
Remaining
Contractual Term
Aggregate
Intrinsic
Value
(In years)(In thousands)
Options outstanding at December 31, 20199,829,287 $10.71 
Options granted4,563,425 $8.09 
Options exercised(1,162,268)$8.02 
Options canceled(1,751,746)$10.19 
Options outstanding at December 31, 202011,478,698 $10.02 7.80$69,616 
Options vested and expected to vest at December 31, 202011,478,698 $10.02 7.80$69,616 
Options exercisable at December 31, 20205,127,517 $10.71 6.48$29,025 
Summary of Restricted Stock Unit Activity
A summary of the Company’s RSU activity is as follows:
Number of
Shares
Weighted-Average
Remaining
Contractual Term
Aggregate Intrinsic
Value
(In years)(In thousands)
RSUs outstanding at December 31, 2019862,850 
RSUs awarded2,517,101 
RSUs released(324,305)
RSUs forfeited(384,118)
RSUs outstanding at December 31, 20202,671,528 1.19$41,689 
RSUs vested and expected to vest at December 31, 20202,671,528 1.19$41,689