Warrants (Tables)

6 Months Ended

Jun. 30, 2019

Warrants and Rights Note Disclosure [Abstract]

Summary of Change in Warrant

The following table summarizes the change in warrants for the six months ended June 30, 2019:

	Number of Warrants		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (in years)	Weighted Average Fair Value
Outstanding at December 31, 2018	4,329,437		1.03	3.7	0.26
Exercised	(200,000	)	1.00	8.2	—
Expired	—		—	—	—
Outstanding at June 30, 2019	4,129,437		1.03	3.0	0.22