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WARRANTS

3 Months Ended

Mar. 31, 2021

Warrants and Rights Note Disclosure [Abstract]

From time to time, we have issued warrants to purchase shares of common stock. These warrants were issued in connection with financing transactions or in exchange for consulting services. Our warrants were subject to standard anti-dilution provisions applicable to shares of our common stock. All of the warrants issued have been either exercised, cancelled, or expired as of December 31, 2020.

A roll-forward of warrant share activity from January 1, 2020 to March 31, 2020 is shown in the following table:


	Exercise Price	Expiration Date	Issued and Outstanding Warrants as of January 1, 2020	Warrants Exercised/ Expired	Issued and Outstanding Warrants as of March 31, 2020
Consulting Warrants	$0.01	6/17/2020	6,667	—	6,667
Financing Warrants	$3.35	6/17/2020	62,530	—	62,530
Private Placement Warrants - September 2017	$4.85	9/28/2020	1,966,319	—	1,966,319
Placement Agent Warrants	$4.85	9/28/2020	98,846	—	98,846
			2,134,362	—	2,134,362