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COMMITMENTS AND CONTINGENCIES (Tables)
3 Months Ended
Mar. 31, 2019
COMMITMENTS AND CONTINGENCIES [Abstract]  
Future Minimum Rental Payments
At March 31, 2019, future minimum rental payments required under operating leases for the remainder of 2019 and thereafter are as follows (in thousands):

2019
 
$
1,043
 
2020
  
1,173
 
2021
  
1,002
 
2022
  
834
 
2023
  
790
 
Thereafter
  
1,438
 
  
$
6,280