Consolidated Statements of Changes in Shareholders' Equity Deficiency (Unaudited) (USD $)	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Balance at Dec. 31, 2014	$ (153,889)	$ 23,937	$ 138,868,523	$ (139,046,349)
Balance, shares at Dec. 31, 2014		23,936,568
Issuance of common stock pursuant to Lincoln Park equity line	246,525	153	246,372
Issuance of common stock pursuant to Lincoln Park equity line, shares		153,010
Issuance of common stock to vendors	101,360	66	101,294
Issuance of common stock to vendors, shares		66,000
Reclassification of warrant liability upon partial exercises of warrants issued in unit offering	1,648,811		1,648,811
Issuance of common stock from exercises of warrants	758,649	1,184	757,465
Issuance of common stock from exercises of warrants, shares		1,183,786
Share-based compensation expense	142,025		142,025
Net loss	(4,569,322)			(4,569,322)
Balance at Mar. 31, 2015	$ (1,825,841)	$ 25,340	$ 141,764,490	$ (143,615,671)
Balance, shares at Mar. 31, 2015		25,339,364