v3.26.1
Stock-based Compensation
 3 Months Ended
Mar. 31, 2026
Share-Based Payment Arrangement [Abstract]  
Stock-based Compensation Stock-based Compensation
Employee Stock Purchase Plan
During the three months ended March 31, 2026 and 2025, no shares of our common stock were purchased under the ESPP. As of March 31, 2026, 1,459,266 shares of common stock were available for future issuance under the ESPP. We recognized $0.1 million of stock-based compensation expenses related to the ESPP for each of the three months ended March 31, 2026 and 2025. As of March 31, 2026, the total unrecognized stock-based compensation expense, net of expected forfeitures, related to the ESPP was $0.5 million and is expected to be recognized over the remaining offering period.
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 March 31,
 20262025
Cost of product revenue$70 $61 
Research and development 486 665 
Selling, general and administrative872 1,653 
Total$1,428 $2,379 
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 March 31,
 20262025
Stock options$742 $1,355 
Restricted stock units (“RSUs”) and RSAs618 919 
ESPP68 105 
Total$1,428 $2,379 
As of March 31, 2026, unrecognized stock-based compensation expense, net of expected forfeitures, was $7.5 million related to unvested stock options and $2.3 million related to unvested RSUs. Stock-based compensation expense for these awards will be recognized through 2030.