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Stock-Based Incentive Compensation Plans (Tables)
9 Months Ended
Sep. 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(1,073,758)
Cancelled527,313 
Withheld for taxes56,006 
Shares available for grant as of September 30, 2024
2,215,236 
Schedule of Stock Option Activity
A summary of stock option activity for the nine months ended September 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
Granted487,654 $12.33 
Exercised(519,314)$1.56 
Cancelled(142,689)$14.67 
Balances at September 30, 2024
2,414,416 $6.12 7.37
Vested and exercisable at September 30, 2024
1,548,358 $4.67 6.50
Vested and expected to vest at September 30, 2024
2,414,416 $6.12 7.37
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 
Granted586,104 $13.45 
Vested(983,744)$6.45 
Cancelled(384,624)$7.61 
Unvested, September 30, 2024
1,648,539 $8.77 
Schedule of Share-based Payment Arrangement, Expensed and Capitalized, Amount
The Company recognized stock-based compensation as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Cost of goods sold$180 $155 $539 $449 
Research and development816 751 2,421 1,984 
Selling, general and administrative1,595 1,515 4,719 4,768 
Total stock-based compensation$2,591 $2,421 $7,679 $7,201 
The above stock-based compensation expense related to the following equity-based awards (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Stock options and restricted stock units$2,462 $2,333 $7,284 $7,010 
ESPP129 88 395 191 
Total stock-based compensation$2,591 $2,421 $7,679 $7,201