XML 35 R24.htm IDEA: XBRL DOCUMENT v3.22.2.2
Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The weighted-average assumptions used in determining the fair value of stock options granted were as follows:
Three Months Ended
September 30,
Nine Months Ended
September 30,
2022202120222021
Volatility83.8 %79.6 %78.6 %78.9 %
Risk-free interest rate3.25 %1.12 %1.92 %1.16 %
Expected life (years)6.256.256.196.25
Dividend yield rate— %— %— %— %
Share-based Compensation, Stock Options, Activity
A summary of stock option activity for the nine months ended September 30, 2022, is presented below:
Weighted
WeightedAverage
AverageRemainingAggregate
StockExerciseContractualIntrinsic
OptionsPer ShareTerms (Years)Value
Outstanding, December 31, 20213,922,286 $11.23 7.10$455 
Granted
1,665,786 6.74 
Exercised
(53,098)10.08 
Canceled/forfeited
(602,342)14.17 
Outstanding, September 30, 20224,932,632 $9.37 7.23$4,245 
Exercisable, September 30, 20222,860,912 $10.35 6.01$1,338 
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
A summary of RSU activity for the nine months ended September 30, 2022, is presented below:
Weighted Average
Grant Date
RestrictedFair Value
Stock UnitsPer Share
Outstanding, December 31, 20211,926,467 $8.06 
Granted1,667,320 6.88 
Vested(553,328)8.22 
Forfeited(401,656)6.88 
Outstanding, September 30, 20222,638,803 $7.46 
Schedule of Stock-based Compensation Expense Allocation
The following table summarizes stock-based compensation expense:
Three Months Ended
September 30,
Nine Months Ended
September 30,
2022202120222021
Selling, general and administrative$2,398 $2,399 $8,236 $6,784 
Research and development85 77 185 143 
$2,483 $2,476 $8,421 $6,927