Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2026

Share-Based Payment Arrangement [Abstract]

The following table summarizes the stock option activity:


	Number of Options	Weighted Average Exercise Price



















Outstanding at December 31, 2025	4,252,490	$	5.45
Granted	—	$	—
Exercised	—	$	—
Forfeited/Cancelled	(18,313)	$	5.35
Outstanding at June 30, 2026	4,234,177	$	5.45

Schedule of Restricted Stock Unit Activity

The following table summarizes the RSU activity under the 2021 Equity Incentive Plan and the 2023 Inducement Plan:


	Number of Shares		Weighted Average Grant Date Fair Value Per Share
	Non-Employee Directors	Directors, Officers and Employees	Non-Employee Directors		Directors, Officers and Employees
Unvested RSUs at December 31, 2025	418,924	5,266,468	$	4.28	$	3.92

Granted	447,917	5,059,241	$	3.04	$	2.48
Vested	(362,094)	(1,443,867)	$	4.52	$	3.83
Forfeited	—	(949,396)	$	—	$	3.51
Unvested RSUs at June 30, 2026	504,747	7,932,446	$	3.01	$	3.07

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions

The following table summarizes the key input assumptions used in the Black-Scholes option-pricing model to estimate the grant-date fair value of the 2021 ESPP:


			June 30, 2026
Expected life of options (in years)			0.50
Expected stock price volatility			56.53%
Risk free interest rate			3.77%
Expected dividend yield			—%
Grant-date fair value per share			$1.01

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense related to RSU awards under the 2021 Equity Incentive Plan and the 2023 Inducement Plan, 2021 ESPP purchases and stock options, as applicable, are as follows:


	For the three months ended June 30,				For the six months ended June 30,
	2026		2025		2026		2025
(In thousands)
Selling, general and administrative	$	2,815	$	2,495	$	5,066	$	4,736
Research and development	200		221		414		392
Total stock-based compensation expense	$	3,015	$	2,716	$	5,480	$	5,128