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Warrants

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Warrants

8. Warrants

A rollforward of the common stock warrants outstanding at September 30, 2019 is as follows. 

		Number of Common Warrants				Number of Pre-Funded Warrants				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (Years)				Aggregate Intrinsic Value
Outstanding January 1, 2019			3,730,944				697,500			$	10.78				0			$	0
Adjustment for Reverse Stock Split			16				0			$	0				0				0
Warrants issued			14,926,161				0			$	1.37				0				0
Pre-funded warrants issued			0				8,947,112			$	0.01				0				0
Pre-funded warrants exercised			0				(9,344,612	)		$	0.01				0				0
Expirations			(3,926	)			0			$	226.60				0				0
Outstanding September 30, 2019			18,653,195				300,000			$	3.61				4.36			$	0

The following represents a summary of the warrants outstanding at each of the dates identified:

		Classification				Exercise Price				Expiration Date				Number of Shares Underlying Warrants
														For the Period Ended September 30,
Issue Date														2019				2018
April 8, 2019			Equity			$	0.01				—				300,000				—
April 8, 2019			Equity			$	1.35				April 8, 2024				12,266,665				—
April 8, 2019			Equity			$	1.6875				April 3, 2024				797,334				—
February 12, 2019			Equity			$	1.8313				February 7, 2024				110,922				—
February 12, 2019			Equity			$	1.34				August 12, 2024				1,706,484				—
February 04, 2019			Equity			$	2.125				January 30, 2024				34,605				—
January 31, 2019			Equity			$	2.125				January 26, 2024				10,151				—
December 3, 2018			Equity			$	3.90				June 3, 2024				937,500				—
April 3, 2018			Equity			$	7.50				April 3, 2023				2,350,011				4,815,000
April 4, 2018			Equity			$	7.50				April 4, 2023				115,000				230,000
August 31, 2015			Equity			$	118.00				August 31, 2020				3,000				3,000
June 15, 2015			Equity			$	75.50				May 6, 2024				319,008				319,008
June 15, 2015			Equity			$	83.50				June 16, 2020				2,515				2,515
June 15, 2015			Equity			$	83.50				Mar 21, 2019				0				3,926
Adjustment for Reverse Stock Split															0				(5	)
Total Outstanding															18,953,195				5,258,444

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- References

No definition available.

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- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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