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Warrants (Tables)

9 Months Ended

Sep. 30, 2018

Warrants [Abstract]

Schedule of outstanding and exercisable warrants issued to private placement

								Shares
				Number of				Underlying				Shares
				Shares				Warrants				Underlying
				Underlying				Exchanged,				Warrants
				Warrants				Exercised				Outstanding								Expiration
				Originally				or				and				Exercise				Term
Description		Grant Date		Granted				or Expired				Exercisable				Price				in years
Series B⁽¹⁾		January 27, 2014			157,846				-				157,846			$	45.00				1.82
Series C⁽²⁾		November 19, 2014			145,399				(142,957	)			2,442			$	12.00				3.13
Repricing Series C⁽²⁾		November 19, 2014							142,957				142,957			$	9.00				3.13
Repricing Series E⁽²⁾		November 19, 2014							142,957				142,957			$	9.00				5.13
Rens⁽³⁾		March 3, 2016			375,000				-				375,000			$	7.00				2.06
					678,245				142,957				821,202

(1)	Issued in connection with the January 27, 2014 private placement transaction.
(2)	Issued in connection with the November 19, 2014 registered-direct public offering, and subsequently revised pursuant to Warrant Exercise Agreements entered into on May 18, 2015.
(3)	Shares issued pursuant to the closing of the first tranche of the financing with RENS Technology Inc.