v3.25.2
Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2025
Stock-Based Compensation  
Schedule of stock-based compensation expense

Three Months Ended June 30, 

Six Months Ended June 30, 

    

2025

    

2024

    

2025

    

2024

    

Research and development

$

17,000

$

(4,000)

$

33,000

$

147,000

General and administrative

88,000

384,000

233,000

566,000

Total stock-based compensation expense

$

105,000

$

380,000

$

266,000

$

713,000

Schedule of stock option activity

    

Options Outstanding

Weighted

Weighted-

Average

Average

Remaining

Aggregate

Number

Exercise

Contractual

Intrinsic

    

of Shares

    

Price

    

Term (in years)

    

Value

Balance, December 31, 2024

 

423,107

$

11.89

 

8.75

$

2,698,000

Granted

 

152,742

$

1.77

Forfeitures

 

(1,333)

$

17.67

Expired

 

(23,057)

$

115.38

Balance, June 30, 2025

 

551,459

$

4.86

8.50

$

25,000

Exercisable at June 30, 2025

 

407,066

$

5.84

8.09

$

25,000

Schedule of weighted-average assumptions used for estimating the fair value of the stock compensation granted

Six Months Ended June 30, 

    

2025

    

2024

 

    

Risk-free interest rate

 

4.17

%  

%  

 

Expected volatility

 

120.47

%  

%  

 

Expected term

 

5.32

years  

years

 

Expected dividend yield

 

%  

%  

 

Weighted average grant date fair value

$

2.34

$

Summary of RSU activity

Number of Units

Weighted average grant date fair value

Outstanding and unvested December 31, 2024

22,421

$ 25.12

Granted

9,603

$ 7.81

Vested

(6,509)

$ 25.44

Outstanding and unvested June 30, 2025

25,515

$ 18.53