STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) (Unaudited) (USD $)	Total	Common Stock Outstanding [Member]	Common Stock Including Additional Paid in Capital [Member]	Treasury Stock [Member]	Accumulated Other Compr. Income [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2010	$ (4,575,525)	$ 140,914	$ 99,316,859	$ (3,076,670)	$ (18,367)	$ (100,938,261)
Balance (in shares) at Dec. 31, 2010		13,331,096		760,274
Statement Table [Line Items]
Valuation of common stock warrants in connection with issuance of 8% Series A Redeemable, Convertible Preferred Stock	2,030,000	0	2,030,000	0	0	0
Conversion of 8% Series A Redeemable, Convertible Preferred Stock	2,119,527	17,233	2,102,294	0	0	0
Conversion of 8% Series A Redeemable, Convertible Preferred Stock (in shares)		1,723,325
Shares issued under CEFF, net of issuance costs	3,116,087	13,405	3,102,682	0	0	0
Shares issued under CEFF, net of issuance costs (in shares)		1,340,514
Shares issued under private placement common stock offering	7,878,968	32,186	7,846,782
Shares issued under private placement common stock offering (in shares)		3,218,612
Stock-based compensation expense	586,976	0	586,976	0	0	0
Issuance of restricted stock upon vesting	0	775	(775)	0	0	0
Issuance of restricted stock upon vesting (in shares)		77,500
Issuance of common stock out of treasury for 401(k) plan matching contribution	28,769	0	140	56,878	0	(28,249)
Issuance of common stock out of treasury for 401(k) plan matching contribution (in shares)		14,044		(14,044)
Unrealized gain on investments available for sale	39,918	0	0	0	39,918	0
Net loss	(10,708,308)	0	0	0	0	(10,708,308)
Balance at Jun. 30, 2011	$ 489,412	$ 204,513	$ 114,957,958	$ (3,019,792)	$ 21,551	$ (111,674,818)
Balance (in shares) at Jun. 30, 2011		19,705,091		746,230