Capital Structure (Tables)

6 Months Ended

Jun. 30, 2019

CAPITAL STRUCTURE

Schedule of outstanding common stock warrants

At June 30, 2019, the following common stock warrants were outstanding: 

Number of shares	Exercise price		Expiration
underlying warrants	per share		date
22,328*	$	8.40	October 2020
2,380*	$	8.68	May 2022
4,000,000	$	12.50	June 2024
4,024,708

*Accounted for as a liability instrument (see Note 6)