WARRANTS (Tables)

3 Months Ended

Mar. 31, 2019

Warrants

Schedule of common stock warrants outstanding

During the three months ended March 31, 2019, the Company did not issue any warrants. The following table summarizes information about common stock warrants outstanding at March 31, 2019:

Outstanding				Exercisable
		Weighted
		Average	Weighted		Weighted
		Remaining	Average		Average
Exercise	Number	Contractual	Exercise	Number	Exercise
Price	Outstanding	Life (Years)	Price	Exercisable	Price
$0.20	15,873	7.59	$0.20	15,873	$0.20
$11.00	14,182	3.61	$11.00	14,182	$11.00
$12.00	3,750	4.09	$12.00	3,750	$12.00
$13.20	7,407	3.59	$13.20	7,407	$13.20
$14.00	106,286	3.62	$14.00	106,286	$14.00
$15.00	6,795	3.13	$15.00	6,795	$15.00
$16.00	24,083	1.45	$16.00	24,083	$16.00
$17.40	86,207	4.12	$17.40	86,207	$17.40
$18.80	384,589	4.13	$18.80	384,589	$18.80
$20.00	14,000	3.70	$20.00	14,000	$20.00
$22.00	37,974	2.43	$22.00	37,974	$22.00
$23.00	85,000	3.99	$23.00	85,000	$23.00
$26.00	49,679	4.04	$26.00	49,679	$26.00
$27.00	55,556	4.12	$27.00	55,556	$27.00
$44.00	31,250	3.82	$44.00	31,250	$44.00
$45.00	5,625	3.82	$45.00	5,625	$45.00
$50.00	8,125	3.82	$50.00	8,125	$50.00
$0.20 - $50.00	936,381	3.93	$20.19	936,381	$20.19

Schedule of option pricing

The Company utilized the Black-Scholes option pricing model and the assumptions used during the three months ended March 31, 2018:

	2018
Weighted average risk-free interest rate		2.41% — 2.61%
Weighted average life (in years)		4.0
Volatility		124.8% — 138.4%
Expected dividend yield		0%
Weighted average grant-date fair value per share of warrants granted	$	23.20