Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014 Product	Dec. 31, 2013
Basis Of Presentation [Line Items]
Number of products under pain franchise	4
Common Stock, par value	$ 0.001	$ 0.001
Office and Manufacturing equipment, basis of valuation	Cost
Office and Manufacturing equipment, depreciation method	Straight-line basis
Idle equipment net	$ 3,301,112	$ 2,844,718
Impairment Charges	0
Onsolis [Member]
Basis Of Presentation [Line Items]
Idle equipment net	2,800,000
Bunavail [Member]
Basis Of Presentation [Line Items]
Idle equipment net	$ 500,000
Minimum [Member]
Basis Of Presentation [Line Items]
Estimated useful lives of equipment	3 years
Maximum [Member]
Basis Of Presentation [Line Items]
Estimated useful lives of equipment	10 years