​

​

​

​

Weighted

​

​

​

​

Average

​

​

Number of

​

Exercise 

​

 Warrants

Price 

Outstanding and exercisable, March 31, 2021

122,367

$

19.69

Expired

(42,684)

$

(9.38)

Outstanding and exercisable, March 31, 2022

79,683

$

25.22

Expired

​

(64,025)

​

​

(9.38)

Outstanding and exercisable December 31, 2022

15,658

$

90.00