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OTHER NONOPERATING EXPENSE, NET
 6 Months Ended
Jun. 30, 2020
Other Income and Expenses [Abstract]  
OTHER NON-OPERATING INCOME / EXPENSE OTHER NON-OPERATING INCOME / EXPENSE, NET
Other non-operating income / expense, net comprised the following for the three and six months ended June 30, 2020 and 2019:
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
 
2020

 
2019

 
2020

 
2019

Interest income
$
151

 
$
115

 
$
293

 
$
267

Foreign currency exchange gain / (loss), net
7

 
2,155

 
(6,335
)
 
(922
)
Change in fair value of derivatives
—

 
—

 
—

 
(36
)
Loss on extinguishment of debt
—

 
(84
)
 
—

 
(235
)
Other income, net
170

 
51

 
234

 
66

Total other non-operating income / (expense), net
$
328

 
$
2,237

 
$
(5,808
)
 
$
(860
)