Segment Reporting (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net revenues:
Net Revenue	$ 76,912	$ 63,868	$ 53,853	$ 56,886	$ 55,877	$ 59,711	$ 49,003	$ 45,870	$ 251,519	$ 210,461	$ 229,681
Gross Profit:
Gross Profit	33,171	17,578	13,318	13,280	11,960	11,791	14,996	12,509	77,347	51,256	86,956
Operating expenses									84,245	69,239	69,466
Income (loss) from operations									(6,898)	(17,983)	17,490
Non-operating income (expenses)									(3,466)	(165)	(263)
Income (loss) before income taxes									(10,364)	(18,148)	17,227
Finished Pharmaceutical Products
Net revenues:
Net Revenue	66,092	57,902	50,075	50,872	49,980	53,729	48,901	45,870	224,941	198,480	229,681
Gross Profit:
Gross Profit	29,357	19,302	12,634	12,853	13,132	12,122	14,961	$ 12,509	74,146	52,724	$ 86,956
API
Net revenues:
Net Revenue	10,820	5,966	3,778	6,014	5,897	5,982	102		26,578	11,981
Gross Profit:
Gross Profit	$ 3,814	$ (1,724)	$ 684	$ 427	$ (1,172)	$ (331)	$ 35		$ 3,201	$ (1,468)