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STOCK-BASED COMPENSATION (Tables)
9 Months Ended
Sep. 30, 2021
STOCK-BASED COMPENSATION [Abstract]  
Activity of Non-vested Restricted Common Stock Awards
A summary of the activity for non-vested restricted stock and RSU awards as of September 30, 2021 and 2020 is presented below:

   
Shares
(in thousands)
   
Weighted Average
Share Price
 
Balance, December 31, 2020
   
522
   
$
7.11
 
Granted
   
25
     
3.88
 
Forfeited
   
(11
)
   
3.53
 
Vested
   
(16
)
   
5.28
 
Balance, September 30, 2021
   
520
   
$
7.08
 
                 
Balance, December 31, 2019
   
606
   
$
7.27
 
Granted
   
33
     
4.38
 
Vested
   
(19
)
   
6.61
 
Balance, September 30, 2020
   
620
   
$
7.14
 
Non-vested, Service-based Awards
As of September 30, 2021, there was unrecognized compensation cost related to non-vested, service-based restricted stock and RSU awards of $1.6 million, which will be recognized in each of the following years:

(in thousands)
     
2021
 
$
205
 
2022
   
784
 
2023
   
538
 
2024
   
24
 
2025
   
5
 
Unrecognized Expense
 
$
1,556