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Related Party Transactions - Schedule of Related Party Transactions (Detail) (Collaborative Arrangement [Member], USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Collaborative Arrangement [Member]
Related Party Transaction [Line Items]
Net product revenues		$ 1,922,782		$ 2,163,183
Royalties	836,913	727,558	1,636,913	1,327,558
Total net revenues	836,913	2,650,340	1,636,913	3,490,741
Cost of product revenues		1,747,809		1,966,333
Gross profit	$ 836,913	$ 902,531	$ 1,636,913	$ 1,524,408

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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