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Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Prepaid and Other Current Assets
 
At December 31,
 
2018
 
2017
 
 
 
 
Prepaid insurance
$
100

 
$
115

Prepaid expenses
94

 
91

Prepaid rent
4

 
4

Short-term deposits
825

 
386

Debt acquisition costs - short-term
71

 

Total prepaid and other current assets
$
1,094

 
596