Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 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:

	December 31, 2013
	Level 1		Level 2		Level 3		Total
Available for sale securities	$	196,650	$	—	$	—	$	196,650
Total assets	$	196,650	$	—	$	—	$	196,650

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