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Other Current Assets
 6 Months Ended
Jun. 30, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Current Assets
Other Current Assets
The following table presents the components of other current assets:
 
June 30,
2019
 
December 31,
2018
 
(In thousands)
 
(unaudited)
 
 
Advances to vendors
$
8,867

 
$
7,758

Prepaid expenses
1,354

 
1,438

Other receivables
19

 
9

Total
$
10,240

 
$
9,205