Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2014

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Summary of Realized and Unrealized Gains/(Losses) of Derivative Instruments

The following table summarizes the realized and unrealized gain / (loss) of the Company’s derivative instruments (in thousands).

	Three Months Ended September 30,					Nine Months Ended September 30,
Realized Gain / (Losses)	2014		2013			2014		2013
Exchange-traded futures contracts	$	-	$	168		$	-	$	490
Unrealized Gain / (Losses)
Exchange-traded futures contracts		-		42			-		(176	)
Forward purchase contracts		-		(11	)		-		1

Input to Lattice Model that was Used to Value Embedded Derivative

The following table sets forth the inputs to the lattice model that were used to value the embedded derivative.

	September 30,			December 31,
	2014			2013
Stock price	$	0.34		$	1.43
Conversion Rate		175.6697			175.6697
Conversion Price	$	5.69		$	5.69
Maturity date	July 1, 2022			July 1, 2022
Risk-free interest rate		2.3	%		2.8	%
Estimated stock volatility		85	%		65	%
Estimated credit spread		20	%		33	%

2022 Notes With and Without Embedded Derivative and Fair Value of Embedded Derivative

The following table sets forth the value of the 2022 Notes with and without the embedded derivative, and the fair value of the embedded derivative (in thousands).

	September 30,		December 31,
	2014		2013
Fair value of Convertible Notes:
With the embedded derivative	$	18,938	$	15,925
Without the embedded derivative		18,938		12,455
Estimated fair value of the embedded derivative	$	-	$	3,470