CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Total stockholders' equity at Dec. 31, 2009	$ (3,489,473)	$ 4,306	$ 100,548,497	$ (104,042,276)	$ 0
Balances (in shares) at Dec. 31, 2009		43,061,635
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(50,348,301)			(50,348,301)
Change in net unrealized gain (loss) on short-term investments	4,067				4,067
Comprehensive income (loss)	(50,344,234)
Number of shares exercised		5,957,808
Issuance of common stock upon exercise of stock options and warrants	8,880,990	596	8,880,394
Stock based compensation	1,483,955		1,483,955
Fair value of exercised common stock warrants	30,555,845		30,555,845
Total stockholders' equity at Dec. 31, 2010	(12,912,917)	4,902	141,468,691	(154,390,577)	4,067
Balances (in shares) at Dec. 31, 2010		49,019,443
Increase (Decrease) in Stockholders' Equity
Net income (loss)	29,099,579			29,099,579
Change in net unrealized gain (loss) on short-term investments	(4,067)				(4,067)
Comprehensive income (loss)	29,095,512
Number of shares exercised		2,123,454
Issuance of common stock upon exercise of stock options and warrants	3,946,237	213	3,946,024
Stock based compensation (in shares)		700,000
Stock based compensation	12,463,772	70	12,463,702
Tax obligation from stock-based compensation (in shares)		(205,545)
Tax obligation from stock-based compensation	(1,353,656)	(21)	(1,353,635)
Fair value of exercised common stock warrants	9,531,911		9,531,911
Total stockholders' equity at Dec. 31, 2011	40,770,859	5,164	166,056,693	(125,290,998)	0
Balances (in shares) at Dec. 31, 2011	51,637,352	51,637,352
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(14,059,539)
Change in net unrealized gain (loss) on short-term investments	0
Comprehensive income (loss)	(14,059,539)
Number of shares exercised	(4,168)	5,168
Issuance of common stock upon exercise of stock options and warrants	(247,833)	0	(247,833)
Stock based compensation (in shares)
Stock based compensation	1,779,515		1,779,515
Total stockholders' equity at Dec. 31, 2012	$ 28,243,002	$ 5,164	$ 167,588,375	$ (139,350,537)	$ 0
Balances (in shares) at Dec. 31, 2012	51,642,520	51,642,520