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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2017
Fair Value Disclosures [Abstract]  
Fair Value of Term Loan and Derivative Liability
 
 
September 30, 2017
 
 
December 31, 2016
(in thousands)
 
Face Value

Fair Value

Carrying Amount
 
 
Face Value
 
Fair Value
 
Carrying Amount
Term Loans
 
$
8,500

 
$
5,736

 
$
7,590

 
 
$
5,000

 
$
4,865

 
$
2,218

Century 10% Warrant
 
$
152

 
$
139

 
$
139

 
 
$
—

 
$
—

 
$
—