Selected Quarterly Financial Data (Details) (USD $)	3 Months Ended								12 Months Ended			0 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 08, 2013
Product sales, net	$ 40,737,000	$ 33,621,000	$ 31,551,000	$ 26,064,000	$ 31,925,000	$ 25,273,000	$ 21,683,000	$ 20,533,000	$ 131,973,000	$ 99,414,000	$ 123,171,000
Promotion services	688,000	666,000	962,000	501,000	809,000	9,953,000	7,609,000	9,273,000	2,817,000	27,644,000	33,098,000
Cost of product sales	7,425,000	6,005,000	5,011,000	4,561,000	6,037,000	3,808,000	3,205,000	4,618,000	23,002,000	17,668,000	21,996,000
Net income	3,519,000	7,915,000	9,640,000	4,134,000	36,000	8,708,000	(1,983,000)	4,203,000	25,208,000	10,964,000	9,620,000
Basic net income per share	$ 0.07	$ 0.16	$ 0.19	$ 0.08	$ 0.00	$ 0.16	$ (0.04)	$ 0.08	$ 0.49	$ 0.20	$ 0.17
Diluted net income per share	$ 0.07	$ 0.15	$ 0.18	$ 0.08	$ 0.00	$ 0.16	$ (0.04)	$ 0.08	$ 0.48	$ 0.20	$ 0.16
Upfront payments	11,000,000						5,000,000		11,000,000	5,000,000
Escrow settlement, cash and shares combined value										2,600,000
Estimated SEC/DOJ investigation loss					2,000,000					2,000,000
Probable payment to government in penalties, fines and/or other remedies									2,000,000
Goodwill and Intangible Asset Impairment											42,728,000
Non cash gain due to decrease in achieving targets											(15,422,000)
NovaMed [Member]
Escrow settlement, cash retained												800,000
Escrow settlement, common stock retained												342,300
Escrow settlement, cash and shares combined value						2,600,000						2,600,000
Sanofi [Member]
Promotion services			$ 200,000