Royalty Monetization - Additional Information (Detail)	12 Months Ended					3 Months Ended			0 Months Ended
	Dec. 31, 2013 USD ($) JPY	Dec. 31, 2013 JPY (¥)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2013 PhaRMA Notes [Member] USD ($)	Dec. 31, 2013 PhaRMA Notes [Member] USD ($)	Mar. 09, 2011 PhaRMA Notes [Member] USD ($)	Mar. 09, 2011 JPR Royalty Sub LLC [Member] USD ($)	Sep. 30, 2013 JPR Royalty Sub LLC [Member] USD ($)
Debt Instrument [Line Items]
Proceeds from non-recourse notes									$ 30,000,000
Net proceeds from transaction									22,691,000
Transaction costs									4,309,000
Establishment costs									3,000,000
Interest Due	3,867,000		1,998,000							2,356,000
Aggregate principal amount								30,000,000
Percentage of interest on notes secured								14.00%
Pharma Notes Interest payment date of first payment	Sep. 01, 2011	Sep. 01, 2011
Royalty payments received						1,844
Interest shortfall					2,356
Aggregate fair value of PhaRMA Notes							30,000,000
Yen rate per dollar	100	100
Currency hedge premium payable period range one	2014	2014
Currency hedge premium payable period range two	2020	2020
Payment of premium	1,950,000
Minimum currency value required for payment of premium on specified date		100,000
Cumulative mark-to-market adjustments - gain/loss	5,294,000		(749,000)	(4,000,000)
Currency Hedge Agreement	0		5,180,000
Currency hedge agreement termination period range one	2016	2016
Currency hedge agreement termination period range two	2020	2020
Termination fee	1,950,000
Termination maximum obligation	5,850,000
Maximum amount of hedge collateral	$ 13,650,000