​

Number

Amount

Balance as of December 31, 2019

16,060,858

​

$

9,979,446

Exercise of Warrants

(5,574,446)

​

(3,463,693)

Balance as of December 31, 2020

10,486,412

​

$

6,515,753

​

​

​

​

​

​

Balance as of December 31, 2020

10,486,412

​

$

6,515,753

Exercise of Warrants

(7,555,130)

​

​

(4,694,395)

Forfeitures of Warrants, due to expiration

(57,224)

​

(35,556)

Balance as of December 31, 2021

2,874,058

​

$

1,785,802