Geographic Information and Customer Concentration - Schedule of revenue by customer (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue, Major Customer [Line Items]
Net revenues	$ 7,091,262	$ 6,673,038	$ 8,230,536	$ 3,833,541	$ 6,376,869	$ 4,946,694	$ 19,244,119	$ 12,494,339	$ 25,828,377	$ 43,062,021	$ 45,676,297
Customer concentration risk [Member]
Revenue, Major Customer [Line Items]
Net revenues									25,828,377	43,062,021	45,676,297
Customer concentration risk [Member] | Merk-Serono [Member]
Revenue, Major Customer [Line Items]
Net revenues									17,215,126	14,627,491	10,353,058
Customer concentration risk [Member] | Actavis [Member]
Revenue, Major Customer [Line Items]
Net revenues									8,061,253	27,826,678	20,122,930
Customer concentration risk [Member] | Lil' Drug Store Prodcuts, Inc. [Member]
Revenue, Major Customer [Line Items]
Net revenues									505,473	445,149	3,787,133
Customer concentration risk [Member] | Cardinal Healthcare [Member]
Revenue, Major Customer [Line Items]
Net revenues									0	232,470	3,729,885
Customer concentration risk [Member] | McKesson [Member]
Revenue, Major Customer [Line Items]
Net revenues									0	229,887	3,130,158
Customer concentration risk [Member] | All others (none of 5%) [Member]
Revenue, Major Customer [Line Items]
Net revenues									$ 46,525	$ (299,654)	$ 4,553,133