Quarterly Results of Operations (Unaudited) (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
Summary of quarterly results of operations [Abstract]
Revenues	$ 23,428,000	$ 18,475,000	$ 19,670,000	$ 19,000,000	$ 22,962,000	$ 46,054,000	$ 16,265,000	$ 18,156,000	$ 80,573,235	$ 103,436,868	$ 63,720,885
Cost and Expense	21,173,000	23,132,000	20,939,000	21,320,000	24,705,000	27,543,000	20,326,000	20,134,000	86,564,640	92,699,186	72,912,470
Net (loss) income	2,267,000	(4,675,000)	(1,472,000)	(2,292,000)	(1,937,000)	15,249,000	(3,999,000)	(1,894,000)	(6,171,159)	7,428,429	(8,774,956)
Net (loss) income per share [Abstract]
Basic (in dollars per share)	$ 0.12	$ (0.25)	$ (0.08)	$ (0.12)	$ (0.1)	$ 0.82	$ (0.21)	$ (0.1)	$ (0.33)	$ 0.40	$ (0.47)
Diluted (in dollars per share)	$ 0.12	$ (0.25)	$ (0.08)	$ (0.12)	$ (0.1)	$ 0.81	$ (0.21)	$ (0.1)	$ (0.33)	$ 0.39	$ (0.47)
Litigation settlement payment		31,000,000				31,000,000				31,000,000
Royalty revenue from settlement						29,800,000				29,800,000
Reduction to general and administrative expenses						6,600,000				6,600,000
Cost of royalty revenue from settlement						11,100,000				11,100,000
Imputed interest income						700,000				700,000
Cost Of Consumer Product Revenues		3,800,000							6,580,752	3,267,165	135,737
Consumer product revenues					3,554,110				3,085,882	3,554,110	0
Cost and expenses related to PaloVia laser					4,300,000
Operating loss from consumer product segment					$ 700,000