Financing Obligations - Schedule of Effective Interest Rate Drawdown after Taking into Consideration Beneficial Ownership Features and Right to Borrow Asset Discount (Detail) - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	May. 31, 2015
Debt Instrument [Line Items]
Draw Amount					$ 0	$ 50,830,000
Beneficial Conversion Feature	$ 1,032,000				$ 0	1,032,000
Debt instrument, effective interest rate		12.25%
Teva Pharmaceuticals USA, Inc. [Member]
Debt Instrument [Line Items]
Draw Amount	5,000,000	$ 5,000,000	$ 5,000,000	$ 10,000,000			$ 25,000,000
Beneficial Conversion Feature	148,000	883,000	657,000	2,455,000		148,000
Reclassified Unamortized Right-to-Borrow	$ 252,000	$ 318,000	$ 393,000	$ 900,000		$ 252,000
Debt instrument, effective interest rate	6.60%	11.60%	10.20%	14.20%	5.20%	6.60%		9.70%