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Stock-Based Incentive Compensation Plans (Tables)
6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Available for Grant
A summary of shares available for grant under the Company’s 2021 Equity Incentive Plan, or the 2021 Plan, is as follows:
Shares Available for Grant
Shares available for grant as of January 1, 20241,314,502 
Authorized1,391,173 
Granted/Awarded(910,445)
Cancelled449,581 
Withheld for taxes46,774 
Shares available for grant as of June 30, 2024
2,291,585 
Schedule of Stock Option Activity
A summary of stock option activity for the six months ended June 30, 2024 is set forth below:
Options Outstanding
Number of SharesWeighted-Average Exercise PriceWeighted Average Remaining Contractual Term (in Years)
Balances as of January 1, 20242,588,765 $4.51 7.17
Granted400,284 $13.45 
Exercised(504,053)$1.54 
Cancelled(109,411)$12.59 
Balances at June 30, 2024
2,375,585 $6.27 7.68
Vested and exercisable at June 30, 2024
1,389,902 $5.09 6.76
Vested and expected to vest at June 30, 2024
2,375,585 $6.27 7.68
Schedule of Restricted Stock Units
Activity with respect to restricted stock units was as follows:
Number of Shares Underlying Outstanding Restricted Stock UnitsWeighted Average Grant Date Fair Value
Unvested, January 1, 20242,430,803 $6.52 
Granted510,161 $14.38 
Vested(765,001)$6.21 
Cancelled(340,170)$7.43 
Unvested, June 30, 2024
1,835,793 $8.66 
Schedule of Share-based Payment Arrangement, Expensed and Capitalized, Amount
The Company recognized stock-based compensation as follows (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2024202320242023
Cost of goods sold$197 $148 $359 $294 
Research and development796 733 1,605 1,233 
Selling, general and administrative1,555 1,774 3,124 3,253 
Total stock-based compensation$2,548 $2,655 $5,088 $4,780 
The above stock-based compensation expense related to the following equity-based awards (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2024202320242023
Stock options and restricted stock units$2,418 $2,606 $4,822 $4,677 
ESPP130 49 266 103 
Total stock-based compensation$2,548 $2,655 $5,088 $4,780