Subsequent Events - Additional Information (Detail) (USD $)	12 Months Ended	3 Months Ended			1 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Teva Pharmaceuticals USA, Inc. [Member]	Sep. 30, 2013 Teva Pharmaceuticals USA, Inc. [Member]	May 31, 2013 Teva Pharmaceuticals USA, Inc. [Member]	Mar. 31, 2014 Subsequent Event [Member]	Mar. 31, 2014 Subsequent Event [Member] Teva Pharmaceuticals USA, Inc. [Member]
Subsequent Event [Line Items]
Proceeds from financing obligations	$ 15,000,000	$ 5,000,000	$ 10,000,000			$ 5,000,000
Private placement to qualified institutional buyers and accredited institutional investors					45,000,000
Warrants to purchase of common stock					345,661
Exercise price of warrants					0.01
Contractual term of the warrant					5 years
Percentage of interest rate payable to investor				4.00%	12.25%
Interest reserve for future payments					6,900,000
Notes redemption starting date					Mar. 18, 2016
Notes redemption ending date					Mar. 19, 2019
Net proceeds from notes before establishment of interest reserve					$ 41,000,000