NOTE 10. WARRANT DERIVATIVE LIABILITY

On May 31, 2019 we received gross proceeds of $3 million by issuing three million shares of our common stock and three million warrants (“2019 Warrants”) to purchase shares of our common stock (together “2019 Units”) in a registered direct offering for $1.00 per 2019 Unit (combined the “2019 Capital Raise”). The 2019 Warrants, issued with the 2019 Capital Raise, are accounted for as a derivative liability. The 2019 Warrant agreements contain a cash settlement provision whereby the holders could settle the warrants for cash based on the Black-Scholes value, upon certain fundamental transactions, as defined in the 2019 Warrant agreement, that are considered outside of the control of management, such as a change of control. The original exercise price of the 2019 Warrants was $1.30 per share. The 2019 Warrants contain certain anti-dilution adjustment provisions with respect to subsequent issuances of securities by the Company at a price below the exercise price of such warrants. As a result of such subsequent issuances of securities by the Company during 2019, the exercise price of the 2019 Warrants had decreased to $0.45 per share and the number of shares subject to the 2019 Warrants had increased to 8,666,666 shares of common stock as of December 31, 2019. In May 2020, we issued securities at a price lower than the $0.45 per share above. As a result, the exercise price of the 2019 Warrants decreased to $0.40 per share and the number of shares subject to the 2019 Warrants increased to 9,591,614 shares of common stock.

In February 2020, one of the warrant holders exercised 200,000 warrants. We received $90,000 in cash for the exercise and booked an adjustment to the derivative liability of $82,241 as a result of the transaction. During the three months ended June 30, 2020, one of the warrants holders exercised 2,137,726 warrants into 373,340 shares of our common stock through cashless exercises. We booked an adjustment to the derivative liability of $821,538 as a result. As of June 30, 2020, there were 7,453,888 of these warrants outstanding.

The following are the key assumptions that were used to determine the fair value of the 2019 Warrants:


	May 31,			June 30,
	2019			2020
Number of shares underlying the warrants		3,000,000			7,453,888
Fair market value of stock	$	0.95		$	0.40
Exercise price	$	1.30		$	0.40
Volatility		133	%		110	%
Risk-free interest rate		1.93	%		0.29	%
Warrant life (years)		5.00			3.92

The following table sets forth a summary of the changes in the fair value of the warrant derivative liability, our Level 3 financial liabilities that are measured at fair value on a recurring basis:


	Three months ended				Six months ended
	June 30,				June 30,
	2020		2019		2020		2019
Beginning balance	$	3,162,733	$	—	$	4,620,593	$	—
Recognition of warrant derivative liability on May 31, 2019		—		2,416,422		—		2,416,422
Warrant exercise		(821,538)		—		(903,779)		—
Change in fair value of warrants derivative liability		4,541		(401,862)		(1,371,078)		(401,862)
Ending balance	$	2,345,736	$	2,014,560	$	2,345,736	$	2,014,560