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Debt (Tables)
 12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]  
Schedule of activity and balances associated with the Notes and related deferred transaction costs
A summary of activity and balances associated with the Notes and related deferred debt costs is presented below ($ in thousands):
 
Notes Balance
 
Deferred Debt Costs
 
Notes, net of
Deferred Debt Costs
Balance December 31, 2015
$
159,011

 
$
7,770

 
$
151,241

Less: amortization for the year ended December 31, 2016 (1)
 
 
(6,921
)
 
6,921

Conversions
(135,497
)
 
—

 
(135,497
)
Balance, December 31, 2016
23,514

 
849

 
22,665

Deferred financing cost related to debt modification on February 28, 2017
 
 
1,591

 
(1,591
)
Less: amortization for the year ended December 31, 2017 (1)
 
 
(1,139
)
 
1,139

Conversions
(4,911
)
 
—

 
(4,911
)
Balance, December 31, 2017
$
18,603

 
$
1,301

 
$
17,302

_____________________
(1) Includes accelerated amortization of deferred debt costs attributable to conversions and exchanges
Schedule of principal and PIK payments under the Term Loan
As of December 31, 2017, principal and PIK payments under the Term Loan were as follows:

Period Ending December 31,
Principal and PIK Loan Repayments
2018
$
—

2019
—

2020
—

2021
—

2022 and thereafter
100,000

 
100,000

Add: Accretion of back-end facility fee
106

Add: PIK interest
3,212

 
103,318

Less: Debt financing costs, net of amortization
(4,658
)
Balance at December 31, 2017
$
98,660