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Stock-Based Incentive Plans (Tables)
 6 Months Ended
Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Summary of Stock Option Activity A summary of the stock option activity is as follows:
OptionsWeighted Average Exercise PriceWeighted Average Remaining Contractual LifeAggregate Intrinsic Value (in thousands)
Outstanding, December 31, 20213,194,738 $15.65 6.45$2,236 
Granted1,109,754 $9.20 
Exercised(41,209)$4.27 
Cancelled(118,100)$16.41 
Outstanding, June 30, 20224,145,183 $14.02 6.98$1,140 
Exercisable, June 30, 20222,145,901 $15.07 5.03$1,138 
Schedule of Weighted-Average Assumptions for Options Granted
The Company used the following weighted-average assumptions for options granted during the six months June 30, 2022:
Expected term (in years)6.05
Expected volatility60.95  %
Risk free rate2.22  %
Expected dividends—  %
Summary of Stock Unit Activity
A summary of the restricted and performance stock unit activity is as follows:
Outstanding Stock Units
Stock UnitsWeighted-Average Fair Value at Date of Grant per ShareWeighted Average Remaining Vesting LifeAggregate Intrinsic Value (in thousands)
Unvested, December 31, 20211,730,765 $18.45 1.51$19,633 
Granted1,874,047 $8.29 
Released(259,341)$14.21 
Forfeited(125,477)$16.61 
Unvested, June 30, 20223,219,994 $12.95 2.01$26,372