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OTHER PREPAID EXPENSES AND CURRENT ASSETS (Tables)
 6 Months Ended
Jun. 30, 2019
OTHER PREPAID EXPENSES AND CURRENT ASSETS [Abstract]  
Other Prepaid Expenses and Current Assets
Other prepaid expenses and current assets consisted of the following (in thousands):

  
June 30,
2019
  
December 31,
2018
 
       
Prepaid insurance
 
$
190
  
$
300
 
Prepaid fees
  
807
   
719
 
Notes receivable
  502   451 
Other prepaid expenses and current assets
  761   1,701 
  
$
2,260
  
$
3,171