v3.26.1
Stock Plans and Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2026
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option
A summary of stock option activity under the 2026 Plan, 2010 Plan, and Inducement Awards are summarized as follows:
Number of
Shares
Weighted
Average
Exercise
Price per
Share
Weighted
Average
Remaining Contractual Life
Aggregate Intrinsic Value
Outstanding, December 31, 2025121,534 $332.26 7.80$— 
Granted— — 
Exercised— — 
Canceled/Forfeited(9,298)575.91 
Outstanding, June 30, 2026
112,236 $312.08 7.06$— 
Exercisable at June 30, 2026
62,464 $495.32 5.90$— 
Vested and unvested expected to vest at June 30, 2026
112,236 $312.08 7.06$— 
Schedule of Valuation Assumptions Used to Calculate Fair Value of Employee Options Awarded
The weighted average grant date fair value of the stock options granted during the six months ended June 30, 2025 was $42.60 and was calculated using the following estimated assumptions under the Black-Scholes option pricing model:
Six Months Ended June 30,
2025
Expected term (years) 6.0
Risk free interest rate
3.9% - 4.4%
Expected volatility
113% - 114%
Expected dividendsNone
Schedule of Restricted Stock Awards
The following table presents a summary of RSUs under the 2010 Plan as of June 30, 2026:
Number of SharesWeighted Average Grant Date Fair Value
Unvested, December 31, 202512,870 $62.60 
Awarded— — 
Vested(3,669)62.60 
Forfeited(2,984)62.60 
Unvested, June 30, 2026
6,217 $62.60 
Schedule of Stock-Based Compensation Expense
For the three and six months ended June 30, 2026 and 2025, the Company recorded stock-based compensation expense to the following line items in its costs and expenses section of the Condensed Consolidated Statements of Operations and Comprehensive Loss:
Three Months Ended June 30,Six Months Ended June 30,
(in thousands)2026202520262025
Research and development$286 $492 $515 $1,084 
General and administrative283 643 629 1,215 
Total stock-based compensation expense$569 $1,135 $1,144 $2,299