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Prepaid Expenses and Other Current Assets (Tables)
6 Months Ended
Jun. 30, 2018
Prepaid Expense and Other Assets, Current [Abstract]  
Schedule of prepaid expenses and other current assets Prepaid expenses and other current assets consisted of the following:
 
 
June 30, 2018
 
December 31, 2017
Prepaid clinical trial costs
 
$
8,917

 
$
4,642

Prepaid insurance
 
1,013

 
455

Other
 
220

 
100

 
 
$
10,150

 
$
5,197