Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Components of (Expense) Income of Derivative Financial Instruments

The following tabular presentation reflects the components of derivative financial instruments as of December 31, 2013, 2012 and 2011.

	2013			2012			2011
Derivative gain (loss) in the accompanying statements of operations is related to the individual derivatives as follows:
Free standing warrants assets, related party	$	(50,300	)	$	(338,500	)	$	(910,231	)
Free standing warrants liabilities		171,528			(5,255,652	)		4,373,684
	$	121,228		$	(5,594,152	)	$	3,463,453

Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table summarizes assets and liabilities measured at fair value on a recurring basis at December 31, 2013 and December 31, 2012, respectively:

	2013								2012
Fair Value Measurements Using:	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets
Derivative asset, warrant	$	—	$	—	$	—	$	—	$	—	$	50,300	$	—	$	50,300
Liabilities
Derivative liabilities	$	—	$	4,315,183	$	—	$	4,315,183	$	—	$	4,497,977	$	—	$	4,497,977

Reconciliation of Beginning and Ending Balances of Assets and Liabilities Measured at Fair Value Using Significant Observable Inputs

Fair Value Measurements Using Significant Observable Inputs (Level 2)

	Value of Warrants			Number of Warrants
Assets:
Warrant asset as of January 1, 2012	$	388,540			2,000,000
Decrease in fair value of warrants		(338,240	)		—
Warrant asset as of December 31, 2012	$	50,300			2,000,000
Decrease in fair value of warrants		(50,300	)		(2,000,000	)
Warrant asset as of December 31, 2013	$	—			—
Liabilities:
Warrant liability as of January 1, 2012	$	279,302			3,246,301
Decrease due to exercise of warrants		(1,037,237	)		(236,865	)
Expiration of warrants		—			(1,000,000	)
Increase in fair value of warrants		5,255,912			—
Warrant liability as of December 31, 2012	$	4,497,977			2,009,436
Decrease due to exercise of warrants		(11,266	)		(10,000	)
Decrease in fair value of warrants		(171,528	)		—
Warrant liability as of December 31, 2013	$	4,315,183			1,999,436