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STOCK-BASED COMPENSATION (Tables)
6 Months Ended
Jun. 30, 2025
STOCK-BASED COMPENSATION  
Schedule of weighted-average assumptions used in Black-Scholes option pricing model

    

    

Six Months Ended June 30, 

    

2025

    

Risk-free interest rate

 

4.44

%  

Expected volatility

 

125.37

%

Expected term (years)

 

5.38

Expected dividend yield

0.00

%

Fair value, per share

$

476.10

Schedule of stock-based compensation expense

Total stock-based compensation expense was as follows (in thousands):

    

Three Months Ended

Six Months Ended

June 30, 

June 30, 

2025

2024

2025

2024

Cost of sales

$

1

$

5

$

7

$

9

Selling, general and administrative

 

345

 

298

853

628

Research and development

64

64

171

130

Total stock-based compensation expense

$

410

$

367

$

1,031

$

767