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Current Liabilities and Debt Obligations (Tables)
12 Months Ended
Dec. 31, 2018
Current Liabilities and Debt Obligations [Abstract]  
Carrying Amount of the Credit Agreement
The carrying amount of the Credit Agreement consisted of the following (in thousands):

  
December 31,
 
  
2018
  
2017
 
Senior term loan principal, including exit fee
 
$
11,825
  
$
11,825
 
Less:  Unamortized discount, debt issuance costs, and lender fees
  
(841
)
  
(1,039
)
Senior term loan, net
 
$
10,984
  
$
10,786
 

We incurred interest expense in the amount of $1.7 million and $1.5 million for the year ended December 31, 2018 and 2017 on the Credit Agreement, respectively.