(in thousands, except rates)

Coupon Rate

Maturity Date

December 31, 2020

Senior secured notes principal amount⁽¹⁾

7.50

%

2/15/2022

$

180,000

Unamortized premium - Senior secured notes

896

Unamortized deferred financing costs - Senior secured notes

(1,236)

Total Senior secured notes, net

$

179,659

Convertible notes - principal amount ⁽²⁾

7.00

%

8/15/2023

115,000

Unamortized discount - Convertible notes⁽³⁾

(1,059)

Unamortized deferred financing costs - Convertible notes

(1,812)

Total Convertible notes, net

$

112,129

Corporate debt principal amount⁽⁴⁾

6.50

%

4/30/2021

$

50,000

Corporate debt principal amount⁽⁵⁾

6.20

%

7/30/2026

104,250

Unamortized discount - Corporate debt

378

Unamortized deferred financing costs - Corporate debt

(3,639)

Total Corporate debt, net

$

150,989

Total carrying amount of debt components

$

442,777

Total carrying amount of conversion option of equity components recorded in equity

$

1,059

(1) Interest on the senior secured notes is payable semiannually on each February 15 and August 15, beginning on August 15, 2017.

(2) Interest on the convertible notes is payable quarterly on February 15, May 15, August 15, and November 15 of each year, beginning on November 15, 2017.

(3) Represents the discount created by separating the conversion option from the debt host instrument.

(4) Interest on the corporate debt is payable January 30, April 30, July 30, and October 30 of each year, beginning on July 30, 2018.

(5) Interest on the corporate debt is payable January 30, April 30, July 30, and October 30 of each year, beginning on October 30, 2019.