Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning Balance at Dec. 31, 2013	$ (1,769,821)	$ 19,626	$ 130,549,930	$ (132,339,377)
Beginning Balance, Shares at Dec. 31, 2013		19,626,439
Issuance of common stock pursuant to Lincoln Park equity line	158,250	77	158,173
Issuance of common stock pursuant to Lincoln Park equity line, Shares		76,932
Issuance of restricted common stock to vendors	153,540	71	153,469
Issuance of restricted common stock to vendors, Shares		71,000
Reclassification of warrant liability upon partial exercise of warrants issued in unit offering	502,025		502,025
Fair value of common stock warrants issued to vendors	4,775		4,775
Issuance of common stock from cashless exercise of warrants		78	(78)
Issuance of common stock from cashless exercise of warrants, Shares		77,889
Stock-based compensation expense	176,662		176,662
Net loss	(3,331,708)			(3,331,708)
Balance at Mar. 31, 2014	$ (4,106,277)	$ 19,852	$ 131,544,956	$ (135,671,085)
Balance, Shares at Mar. 31, 2014		19,852,260