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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Note [Abstract]

Summary of Warrant Activity and Changes in Warrants Outstanding

A summary of warrant activity and changes in warrants outstanding, including both liability and equity classifications, is presented below:

			Number of Warrants						Weighted-Average Exercise Price Per Share						Weighted-Average Remaining Contractual Term
Balance outstanding, December 31, 2018			3,649,341						$	8.91					4.4 years
Granted			7,437,454						$	1.87
Exercised			(497,313)						$	6.60
Balance outstanding, December 31, 2019			10,589,482						$	4.08					3.7 years
Granted			5,831,451						$	1.70
Exercised			(11,159,941)						$	2.31
Balance outstanding, December 31, 2020			5,260,992						$	5.19					4.1 years

The above table excludes pre-funded warrants with a nominal exercise price of $.01 per share:

1.605,072 pre-funded warrants outstanding as of December 31, 2019;

2.386,967 pre-funded warrants which were issued during the twelve months ending December 31, 2020;

3.All 992,039 pre-funded warrants were exercised in full during the twelve months ending December 31, 2020.

Schedule of Preferred Stock

A summary of our Company's classes of preferred stock is presented below:

																								Shares outstanding
Class						Par value						Shares designated						Liquidation preference						As of December 31, 2020						As of December 31, 2019
Series A Convertible Preferred Stock						$	0.001					277,100						$	606,000					60,600						60,600
Series B Convertible Preferred Stock						$	0.001					8,860						None						—						—
Series C Convertible Preferred Stock						$	0.001					200,000						None						—						—
Series D Convertible Preferred Stock						$	0.0001					154,670						None						—						—
Series E Convertible Preferred Stock						$	0.001					865,824						None						655,044						—

X

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

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Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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