Basis of Presentation - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013 Product	Dec. 31, 2012	Sep. 30, 2012
Basis Of Presentation [Line Items]
Number of products under pain franchise	4
Common Stock, par value	$ 0.001	$ 0.001	$ 0.001
Idle equipment, net	$ 2,469,178
Impairment Charges	$ 0
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