A summary of stock option activity under the 2021 Equity Incentive Plan ("Plan") during the three months ended March 31, 2026 is as follows:


	Shares Underlying Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Intrinsic Value
Outstanding at December 31, 2025		628	$	6,874.80		8.64	$	—
Forfeited		—		1,170.00		—		—
Outstanding at March 31, 2026		628		6,901.20		8.40		—
Exercisable at March 31, 2026		203	$	12,959.60		7.90	$	—

For the three months ended March 31, 2026 and 2025, the Company recorded stock-based compensation expense related to stock options of $23 and $22, which is included in general and administrative expense. As of March 31, 2026 and 2025, $203 and $191 of unrecognized compensation expense related to non-vested awards is expected to be recognized over the weighted average period of 8.87 and 9.25

years, respectively. The aggregate intrinsic value is calculated as the difference between the fair value of the Company’s stock price and the exercise price of the options.

The Company measures the fair value of RSUs using the stock price on the date of grant. Stock-based compensation expense for employee-granted RSUs is generally recorded ratably over their vesting period of (a) four years, with 25% of the RSUs vesting on each anniversary, or (b) one year, with 25% vesting quarterly, or (c) one year, with 100% vesting on the first anniversary of the vesting commencement date until the RSU is fully vested. Stock-based compensation expense for RSUs granted to non-employee directors is recorded ratably over the vesting period which is the earlier of the one (1) year anniversary of the respective grant date, or the next annual meeting of stockholders following the respective grant date.

A summary of the RSU activity during the three months ended March 31, 2026 is as follows:


	Units			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2025		20,695		$	149.00
Granted		44,557			21.96
Vested		(38,304	)		36.84
Forfeited		(240	)		206.00
Outstanding at March 31, 2026		26,708		$	71.77

For the three months ended March 31, 2026 and 2025, the Company recorded total stock-based compensation expense related to RSUs of $1,065 and $315, respectively, which is included in general and administrative expense. As of March 31, 2026 and 2025, unrecognized compensation cost related to the grant of RSUs was $1,542 and $191, respectively. Unvested outstanding RSUs as of March 31, 2026 and 2025 had a weighted average remaining vesting period of 1.73 and 2.25 years, respectively.

In November 2025, the Board granted an equity award to the Company’s CEO ("CEO Award") that includes a market condition based on specified market capitalization thresholds ranging from $15.0 million to $30.0 million, which result in stock grants ranging from $250 to $750, up to $2.0 million in the aggregate. The CEO Award is equity-classified and the grant-date fair value was estimated using a Monte Carlo simulation model, using historical volatility as a key input. The Company recognized $220 of stock-based compensation expense related to this award for the three months ended March 31, 2026.