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Investments (Tables)
6 Months Ended
Jun. 30, 2019
Investments [Abstract]  
Schedule of Variable Interest Entities As the Company has determined the SPE is a variable interest entity ("VIE") of which it became the primary beneficiary upon the effectiveness of the arrangement, the Company has consolidated the assets and liabilities of the SPE in its consolidated balance sheet as of June 30, 2019 and December 31, 2018 as follows.

 
June 30, 2019
 
December 31, 2018
Assets
 
 
 
Current assets
$
2

 
$
2

Restricted cash
$
150

 
$
214

Property, plant and equipment
$
200

 
$
130

Liabilities
 
 
 
Current liabilities
$
2

 
$

Other long-term liabilities
$
350

 
$
346