XML 26 R16.htm IDEA: XBRL DOCUMENT v3.26.3
Stock-based Compensation
 9 Months Ended
Sep. 30, 2026
Share-Based Payment Arrangement [Abstract]  
Stock-based Compensation Stock-based Compensation
Employee Stock Purchase Plan

During the three months ended September 30, 2026 and 2025, no shares of our common stock were purchased under the ESPP. During the nine months ended September 30, 2026 and 2025, 96,758 and 151,490 shares of our common stock were purchased under the ESPP, respectively. As of September 30, 2026, 1,362,508 shares of common stock were available for future issuance under the ESPP. We recognized $0.1 million and $0.3 million of stock-based compensation expense related to the ESPP for the three and nine months ended September 30, 2026, respectively, and $0.1 million and $0.3 million for the three and nine months ended September 30, 2025, respectively. As of September 30, 2026, the total unrecognized stock-based compensation expense, net of expected forfeitures, related to the ESPP was $0.3 million and is expected to be recognized over the remaining offering period through 2028.
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,
2026202520262025
Cost of product revenue$32 $16 $141 $134 
Research and development 596 675 1,710 2,064 
Selling, general and administrative920 1,822 2,708 5,226 
Total$1,548 $2,513 $4,559 $7,424 
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,
2026202520262025
Stock options$1,087 $1,455 $2,723 $4,289 
Restricted stock units (“RSUs”) and RSAs385 950 1,578 2,805 
ESPP76 108 258 330 
Total$1,548 $2,513 $4,559 $7,424 
As of September 30, 2026, unrecognized stock-based compensation expense, net of expected forfeitures, was $7.0 million related to unvested stock options and $1.5 million related to unvested RSUs. Stock-based compensation expense for these awards will be recognized through 2031.