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Capitalization (Tables)
 12 Months Ended
Dec. 31, 2015
Equity [Abstract]  
Convertible Preferred Stock
At December 31, 2013, the Company’s outstanding convertible preferred stock consisted of the following:
 
 
December 31, 2013
 
 
Shares
Authorized
 
Shares
Outstanding
 
Carrying
Values
 
Liquidation
Preference
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Dollars in thousands)
Series A
 
6,154,000

 
6,154,000

 
$
4,000

 
$
6,118

Series B
 
13,588,160

 
13,562,986

 
21,087

 
30,754

Series C
 
4,765,173

 
3,919,306

 
9,484

 
12,779

Series D
 
5,184,191

 
5,184,189

 
18,000

 
23,121

Total
 
29,691,524

 
28,820,481

 
$
52,571

 
$
72,772

The original issue price and conversion price of the each series of preferred stock were as follows:

 
 
Original Issue
Price per share
 
Conversion Price
per share
Series A
 
$
0.65

 
$
1.30

Series B
 
$
1.55556

 
$
3.11112

Series C
 
$
2.42729

 
$
4.85458

Series D
 
$
3.55603

 
$
7.11206