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STOCK-BASED COMPENSATION (Tables)
9 Months Ended
Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Stock-based compensation expense for restricted stock in the consolidated statements of operations is summarized as follows:

Stock-based compensation expense for restricted stock in the consolidated statements of operations is summarized as follows:

 

                                 
   Three months ended
September 30,
   Nine months ended
September 30,
 
   2023   2022   2023   2022 
Cost of sales  $6,612   $6,471   $58,860   $26,477 
Selling, general and administrative   134,104    78,507    600,995    221,882 
Total stock-based compensation expense  $140,716   $84,978   $659,855   $248,359 
The following table summarizes activity related to outstanding RSUs and Restricted Stock Awards for the nine months ended September 30, 2023:

The following table summarizes activity related to outstanding RSUs and Restricted Stock Awards for the nine months ended September 30, 2023:

 

    Restricted Stock Awards  

Weighted Average

Grant Date

Fair Value of Restricted Stock Awards

   RSUs  

Weighted Average

Grant Date

Fair Value of RSUs

 
Non-vested – January 1, 2023    239,184   $2.32       $ 
Granted    212,902   $3.82    170,042   $3.44 
Vested    (82,769)  $2.83    (103,070)  $3.44 
Forfeited    (41,073)  $1.60    (33,749)  $3.42 
Non-vested – September 30, 2023    328,244   $3.25    33,223   $3.47