CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (DEFICIT) (Unaudited) (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Series A Preferred Stock [Member]
Beginning Balance at Dec. 31, 2013	$ (812,351)	$ 38,204	$ 150,506,927	$ (47,183)	$ (151,313,008)	$ 2,709
Beginning Balance, shares at Dec. 31, 2013		38,204,384				2,709,300
Stock-based compensation	2,479,256	0	2,479,256	0	0	0
Restricted stock awards	0	364	(364)	0	0	0
Restricted stock awards, shares		363,893				0
Exercise of stock options	2,832,534	932	2,831,602	0	0	0
Exercise of stock options, shares	939,206	932,391				0
Exercise of warrants	3,994,356	799	3,993,557	0	0	0
Exercise of warrants, shares		798,871				0
Cashless exercise of warrants	0	98	(98)	0	0	0
Cashless exercise of warrants, shares		97,549				0
Shares issued pursuant to registered direct offering, net	58,181,172	7,500	58,173,672	0	0	0
Shares issued pursuant to registered direct offering, shares		7,500,000				0
Shares issued pursuant to an at the market offering, net	3,855,701	659	3,855,042	0	0	0
Shares issued pursuant to an at the market offering, shares		658,489				0
Warrant derivative liability reclassified to equity	2,499,273	0	2,499,273	0	0	0
Short swing profit return	82,337	0	82,337	0	0	0
Conversion of preferred shares to common shares	0	570	0	0	0	(570)
Conversion of preferred shares to common shares, shares		570,300				(570,300)
Net loss	(11,315,780)	0	0	0	(11,315,780)	0
Ending Balance at Jun. 30, 2014	$ 61,796,498	$ 49,126	$ 224,421,204	$ (47,183)	$ (162,628,788)	$ 2,139
Ending Balance, shares at Jun. 30, 2014		49,125,877				2,139,000