The following table summarizes the allocation of stock-based compensation related to stock options and restricted stock units (RSUs) in the accompanying condensed consolidated statements of operations (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2026		2025		2026		2025
Cost of sales	$	1,231	$	1,110	$	3,877	$	3,151
Selling, general and administrative		12,565		10,469		48,767		32,455
Research and development		3,977		3,334		13,138		10,312
Total	$	17,773	$	14,913	$	65,782	$	45,918

At September 30, 2026, the total unamortized stock‑based compensation expense was approximately $112.9 million, of which $17.5 million and $95.4 million was attributable to stock options and RSUs, respectively. The Company currently issues its annual stock options and RSU grants to senior executives during the first quarter and all other eligible employees during the second quarter, of each year.

Of the $17.5 million related to stock options, $13.0 million is attributable to time-based stock options and will be recognized over the time-based stock options’ remaining vesting terms of approximately 4.0 years (2.6 years on a weighted average basis). The remaining $4.5 million is attributable to performance-based options and will be recognized over the performance-based stock options’ remaining vesting terms of approximately one year (1.1 years on a weighted average basis).

Of the $95.4 million related to RSUs, $88.0 million is attributable to time-based RSUs and will be recognized over the RSUs’ vesting terms of approximately 4.0 years (2.8 years on a weighted-average basis). The remaining $7.4 million is attributable to performance-based RSUs and will be recognized over the performance-based RSUs’ remaining vesting terms of less than two years (1.2 years on a weighted average basis).

The total stock-based compensation cost capitalized in inventory was not significant for the three and nine months ended September 30, 2026 or 2025.