Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Summary of Financial Asset Measured at Fair Value

The following table summarizes the financial assets that we measured at fair value as of September 30, 2013 and December 31, 2012.

	September 30, 2013
	Level 1		Level 2		Level 3		Total
Available for sale securities	$	24,310	$	—	$	—	$	24,310
Contingent Royalty	$	—	$	—	$	16,000,000	$	16,000,000

	December 31, 2012
	Level 1		Level 2		Level 3		Total
Available for sale securities	$	838,309	$	—	$	—	$	838,309
Contingent Royalty	$	—	$	—	$	16,000,000	$	16,000,000