Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended
	May 31, 2012	Jan. 31, 2012	Dec. 31, 2013 Agreement	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013 Arcion License Agreement [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]
Basis Of Presentation [Line Items]
Common Stock, par value			$ 0.001	$ 0.001	$ 2.91
FDIC insurance coverage amount			$ 250,000
Net deposit amount exceeds specified amount under FDIC			22,800,000
Non-refundable up-front license payment	15,000,000	30,000,000
Recognized Deferred revenue related to research and development services rendered		14,400,000
Deferred amount earned out of total deferred revenue			6,300,000	5,200,000
Revenue recognized from delivery of license rights to Endo		15,600,000
Payment to Arcion in unregistered Common Stock						2,100,000
License and Development agreements			2
Trade accounts receivable			99.60%	83.00%
Estimated useful lives of equipment							3 years	10 years
Idle equipment net			2,844,718
Impairment charges recognized on finite lived intangibles assets			0	0	0
Amortization expense on other intangible assets			1,000,000	1,000,000	900,000
Goodwill impairment charges			$ 0	$ 0	$ 0
Outstanding stock options and warrants			6,549,719	5,509,075	7,847,052