Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2014

Fair Value Measurements [Abstract]

Assets And Liabilities Measure At Fair Value On A Recurring Basis By Level

	Fair Value Measurement Using
	Total		Quoted Prices in Active Markets for Identical Instruments (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Assets at March 31, 2014:
Cash equivalents	$	8,970,282	8,970,282	—	—
Total assets at fair value	$	8,970,282	8,970,282	—	—
Liabilities at March 31, 2014:
Warrants issued December 29, 2008	$	597	—	—	597
Warrants issued May 10, 2012		2,316,594	—	—	2,316,594
Warrants issued August 2013		4,403,574			4,403,574
Total liabilities at fair value:	$	6,720,765	—	—	6,720,765
Assets at December 31, 2013:
Cash equivalents	$	11,995,481	11,995,481	—	—
Total assets at fair value	$	11,995,481	11,995,481	—	—
Liabilities at December 31, 2013:
Warrants issued December 29, 2008	$	16,863	—	—	16,863
Warrants issued May 10, 2012		1,915,753	—	—	1,915,753
Warrants issued August 2013		3,712,010	—	—	3,712,010
Total liabilities at fair value:	$	5,644,626	—	—	5,644,626

Summary Of Changes In The Fair Value Of The Company's Level 3 Financial Asset And Liabilities

	Warrants issued December 29, 2008	Warrants issued May 2012	Warrants issued August 2013	Total Liabilities
Balance at beginning of period	$                16,863	$           1,915,753	$        3,712,010	$     5,644,626
Settlements	-	-	-	-
Revaluation	(16,266)	400,841	691,564	1,076,139
Balance at end of period	$                     597	$           2,316,594	$        4,403,574	$     6,720,765