Product Milestone Payments and Royalty Agreements - Additional Information (Detail) (USD $)	36 Months Ended		1 Months Ended
	Dec. 31, 2013	Jun. 30, 2005	Jun. 30, 2005 Minimum [Member]	Jun. 30, 2005 Maximum [Member]
Royalty Agreement [Line Items]
Additional consideration of asset purchase agreement		$ 10,950,000
Common stock shares		36,135
Maximum royalty payments percentage			1.75%	4.00%
Payments related to the additional considerations	$ 0