Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Measurements [Abstract]

Assets And Liabilities Measured At Fair Value On 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)
Liabilities at March 31, 2018:
Warrants issued May 2012	$	—	$	—	$	—	$	—
Warrants issued August 2013		—		—		—		—
Warrants issued September 2016		—		—		—		—
Total liabilities at fair value:	$	—	$	—	$	—	$	—
Liabilities at December 31, 2017:
Warrants issued May 2012	$	—	$	—	$	—	$	—
Warrants issued August 2013		5,746		—		—		5,746
Warrants issued September 2016		19,569,231		—		—		19,569,231
Total liabilities at fair value:	$	19,574,977	$	—	$	—	$	19,574,977

Summary Of Changes In Fair Value Of Level 3 Financial Liabilities

	Warrants issued May 2012	Warrants issued August 2013	Warrants issued September 2016	Total Liabilities
Balance at beginning of period	$                    -	$             5,746	$    19,569,231	$    19,574,977
Issues	-	-	-	-
Reclassifications	-	-	(16,984,616)	(16,984,616)
Settlements	-	-	-	-
Revaluation	-	(5,746)	(2,584,615)	(2,590,361)
Balance at end of period	$                    -	$                    -	$                    -	$                    -