Summary of Significant Accounting Policies (Accounts Receivable, Property, Plant and Equipment, and Net Loss Per Share) (Details) (USD $)	3 Months Ended									6 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounting Policies [Abstract]
Receivables Percentage		100.00%				100.00%								100.00%	100.00%
Earnings Per Share [Abstract]
Net income (loss)	$ (4,615,609)	$ (2,618,000)	$ (3,058,734)	$ (3,766,838)	$ (4,616,000)	$ (5,061,000)	$ 8,326,309	$ 27,345,796	$ (1,512,000)	$ (8,382,447)	$ 25,834,234	$ (11,441,183)	$ 34,160,542	$ (14,059,539)	$ 29,099,579	$ (50,348,301)
Change in fair value of warrants															(24,436,309)	0
Net Income (Loss), adjusted for change in fair value of warrants for diluted earnings per share														$ (14,059,539)	$ 53,535,888	$ (50,348,301)
Weighted average shares: basic							50,806,284	50,879,599			50,422,014		50,739,475	51,639,622	50,929,491	45,151,774
Effect of potential common shares														0	3,132,159	0
Weighted-average shares: diluted							51,987,253	54,671,403			54,507,838		54,234,977	51,639,622	54,061,650	45,151,774
Earning (loss) per share: basic		$ (0.04)	$ (0.06)	$ (0.07)	$ (0.09)	$ (0.11)	$ 0.16	$ 0.54	$ (0.03)		$ 0.51		$ 0.67	$ (0.27)	$ 0.57	$ (1.12)
Earnings (loss) per share: diluted		$ (0.04)	$ (0.06)	$ (0.07)	$ (0.09)	$ (0.11)	$ 0.11	$ 0.40	$ (0.03)		$ 0.28		$ 0.20	$ (0.27)	$ 0.09	$ (1.12)
Anti-dilutive Securities Excluded from Computation of Earnings Per Share, Amount														0	504,668	0
Lab equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life														5 years
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life														3 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life														7 years