Consolidated Statements of Changes In Stockholders' Equity (USD $)	Total	$1.5 Million Purchase Agreement with Lincoln Park	Beneficial Conversion Feature	Warrants Attached to Debt	Common Stock	Common Stock $1.5 Million Purchase Agreement with Lincoln Park	Additional Paid in Capital	Additional Paid in Capital $1.5 Million Purchase Agreement with Lincoln Park	Additional Paid in Capital Beneficial Conversion Feature	Additional Paid in Capital Warrants Attached to Debt	Accumulated Deficit
Beginning balance at Dec. 31, 2012	$ 2,883,332				$ 62,494		$ 112,432,458				$ (109,611,620)
Beginning balance (in shares) at Dec. 31, 2012					6,249,369
Conversion of convertible notes (in shares)					365,263
Conversion of convertible notes	1,000,000				3,652		996,348
Discount			141,829	195,969					141,829	195,969
Shares issued for cash, net of offering costs (in shares)					1,375,952
Shares issued for cash, net of offering costs	3,578,288				13,760		3,564,528
Commitment fees on Lincoln Park $1.5 million share purchase agreement (in shares)						975
Commitment fees on Lincoln Park $1.5 million share purchase agreement		1,234				10		1,224
Warrant expense	219,553						219,553
Option expense	495,318						495,318
Net loss	(7,173,912)										(7,173,912)
Ending balance at Jun. 30, 2013	$ 1,341,611				$ 79,916		$ 118,047,227				$ (116,785,532)
Ending balance (in shares) at Jun. 30, 2013					7,991,559