The following table summarizes stock-based compensation expense included in operating expenses (in thousands):


	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2026		2025		2026		2025
Cost of sales	$	23	$	36	$	49	$	82
Research and development		519		1,182		1,405		2,097
Selling, general and administrative		1,387		2,566		3,482		5,165
Total	$	1,929	$	3,784	$	4,936	$	7,344

Our 2022 Equity Incentive Plan, as amended (the “2022 Plan”), provides for the grant of incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards and other stock-based awards. On May 21, 2026, our stockholders approved an increase of 3,000,000 shares to the number of shares of our common stock available for issuance under the 2022 Plan.

On May 21, 2026, our stockholders also approved an increase of 1,400,000 shares to the number of shares of our common stock available for issuance under our employee stock purchase plan.