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Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2017
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]  
Financial Instruments
Using interest rate quotes and discounted cash flows, the Company estimated the fair value of its outstanding capital lease obligations as follows:
 
December 31,
2017
 
December 31,
2016
 
Carrying Value
 
Fair Value
 
Carrying Value
 
Fair Value
Capital lease obligations
$
724

 
$
744

 
$
1,072

 
$
1,139