Warrants to Purchase Common Stock (Tables)

6 Months Ended

Jun. 30, 2021

Warrants To Purchase Common Stock

Summary of activity related to warrants

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term
Outstanding at January 1, 2021		2,516,778		$	3.30		0.83
Issued		—			—		—
Exercised		(2,516,778	)		3.30		—
Outstanding at June 30, 2021		—		$	—		—

A summary of activity related to warrants for the six months ended June 30, 2020 follows:

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term
Outstanding at January 1, 2020		4,531,924	$	0.72		4.05
Outstanding at June 30, 2020		4,531,924	$	0.72		3.80
Exercisable at June 30, 2020		4,531,924	$	0.72		3.80