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Commitments and Contingencies (Tables)
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]    
Schedule of Rent Expense
Rent expense consisted of the following:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2017
 
2016
 
2017
 
2016
Straight-line rent expense
$
83

 
$
83

 
$
249

 
$
216

Contingent rent expense
77

 
83

 
232

 
191

   Total rent expense
$
160

 
$
166

 
$
481

 
$
407

Rent expense consisted of the following:
 
For the Year Ended
December 31,
 
2016
 
2015
Straight-line rent expense
$
299

 
$
253

Contingent rent expense
266

 
250

Rent expense allocated to AuraSense, LLC (1)

 
(17
)
   Total rent expense
$
565

 
$
486

____________________
(1)
See Note 11, Related-Party Transactions, for more information.
Schedule of Future Minimum Rental Payments
Future minimum lease payments as of September 30, 2017 are as follows:
Years ending December 31,
 
Operating Leases
2017
 
$
84

2018
 
341

2019
 
347

2020
 
353

2021
 
59

Thereafter
 

   Total
 
$
1,184

Future minimum lease payments as of December 31, 2016 are as follows:
Years ending December 31,
Operating Leases
2017
$
335

2018
341

2019
347

2020
353

2021
59

Thereafter

   Total
$
1,435