Warrants (Tables)

3 Months Ended

Mar. 31, 2020

Warrants and Rights Note Disclosure [Abstract]

Summary of Change in Warrants

The following table summarizes the change in warrant shares for all outstanding warrants, including the Series B Warrants, the Series C Warrants, and the Series D Warrants for the three months ended March 31, 2020:

	Number of Warrant Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (in years)	Weighted Average Fair Value
Outstanding at December 31, 2019	2,071,172		$2.05	2.4	$	1.34
Sold or granted	50,735,292		0.68	2.9	0.12
Exercised	—		—	—	—
Exchanged	(2,040,757	)	1.24	—	—
Adjustment to number of warrant shares due to down-round adjustment	607,687		0.37	2.1	0.14
Outstanding at March 31, 2020	51,373,394		$0.71	2.9	$	0.13