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STOCKHOLDERS' EQUITY (Tables)
 12 Months Ended
Dec. 31, 2021
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, 202011,478,698 $10.02 
Options granted3,619,775 $11.13 
Options exercised(725,058)$7.79 
Options canceled(2,410,138)$10.67 
Options outstanding at December 31, 202111,963,277 $10.36 7.30$4,603 
Options exercisable at December 31, 20216,541,228 $10.51 6.14$3,968 
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, 20202,671,528 
RSUs awarded2,140,785 
RSUs released(985,350)
RSUs forfeited(687,369)
RSUs outstanding at December 31, 20213,139,594 1.02$23,547