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Common stock (Tables)
3 Months Ended
Mar. 31, 2022
Common stock  
Schedule of warrants outstanding

At March 31, 2022, common stock warrants outstanding were as follows:

Warrants

    

Exercise Price per Share

Expiration Date

803,112

$ 9.00

June 2, 2023

500,000

$ 45.00

April 28, 2024