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Stock-based Compensation (Tables)
9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-based Compensation Expense
Stock-based compensation expense is included in the unaudited condensed consolidated statements of operations as follows (in thousands):
 Three Months Ended September 30,Nine Months Ended September 30,
 2024202320242023
Cost of product revenue$93 $60 $309 $272 
Research and development 690 450 2,151 1,978 
Selling, general and administrative1,925 1,773 8,101 5,558 
Total$2,708 $2,283 $10,561 $7,808 
Schedule of Stock-based Compensation Expense by Security Types
The following table presents total stock-based compensation expense by security type included in the unaudited condensed consolidated statements of operations (in thousands):
 Three Months Ended September 30,Nine Months Ended September 30,
 2024202320242023
Stock options$1,506 $1,017 $5,137 $3,035 
RSUs and RSAs1,109 942 3,578 3,441 
Performance-contingent restricted stock units (“PSUs”)— 292 247 1,408 
Performance based options (“PBOs”)— 32 1,357 (76)
ESPP93 — 242 — 
Total$2,708 $2,283 $10,561 $7,808