STATEMENTS OF CHANGES IN STOCKHOLDERS' (DEFICIT) EQUITY (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2009	$ 128,952	$ 95,035,165	$ (3,076,670)	$ 68,173	$ (82,119,826)	$ 10,035,794
Balance (in shares) at Dec. 31, 2009	12,134,900		760,274
Comprehensive loss:
Net loss	0	0	0	0	(18,818,435)	(18,818,435)
Unrealized loss on investments available for sale	0	0	0	(86,540)	0	(86,540)
Total comprehensive loss						(18,904,975)
Shares issued under CEFF, net of issuance costs	11,039	2,611,497	0	0	0	2,622,536
Shares issued under CEFF, net of issuance costs(in shares)	1,103,919
Stock-based compensation expense	0	1,653,060	0	0	0	1,653,060
Issuance of restricted stock upon vesting	863	(863)	0	0	0	0
Issuance of restricted stock upon vesting(in shares)	86,277
Shares issued in exchange for services	60	18,000				18,060
Shares issued in exchange for services (in shares)	6,000
Balance at Dec. 31, 2010	140,914	99,316,859	(3,076,670)	(18,367)	(100,938,261)	(4,575,525)
Balance (in shares) at Dec. 31, 2010	13,331,096		760,274
Comprehensive loss:
Net loss	0	0	0	0	(23,222,678)	(23,222,678)
Unrealized loss on investments available for sale	0	0	0	(258,333)	0	(258,333)
Total comprehensive loss						(23,481,011)
Shares issued under CEFF, net of issuance costs	13,405	3,102,682	0	0	0	3,116,087
Shares issued under CEFF, net of issuance costs(in shares)	1,340,514
Registered Direct and Private Placement Private Placement common stock offerings	161,294	44,543,243	0	0	0	44,704,537
Registered Direct and Private Placement Private Placement common stock offerings(in shares)	16,129,373
Conversion of common stock warrants	1,569	426,768	0	0	0	428,337
Conversion of common stock warrants(in shares)	156,866
Stock-based compensation expense	0	1,207,886	0	0	0	1,207,886
Issuance of restricted stock upon vesting	976	(976)	0	0	0	0
Issuance of restricted stock upon vesting(in shares)	97,612
Issuance of common stock out of treasury	0	249	192,545	0	(60,884)	131,910
Issuance of common stock out of treasury(in shares)	47,542		(47,542)
Valuation of common stock warrants in connection with issuance of 8% Series A Redeemable, Convertible Preferred Stock	0	2,030,000	0	0	0	2,030,000
Conversion of 8% Series A Redeemable, Convertible Preferred Stock	20,833	2,610,514	0	0	0	2,631,347
Conversion of 8% Series A Redeemable, Convertible Preferred Stock(in shares)	2,083,322
Balance at Dec. 31, 2011	$ 338,991	$ 153,237,225	$ (2,884,125)	$ (276,700)	$ (124,221,823)	$ 26,193,568
Balance (in shares) at Dec. 31, 2011	33,186,325		712,732