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Common stock (Tables)
6 Months Ended
Jun. 30, 2022
Common stock  
Schedule of warrants outstanding

At June 30, 2022, common stock warrants outstanding were as follows:

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Warrants

    

Exercise Price per Share

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Expiration Date

803,112

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$ 9.00

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June 2, 2023

500,000

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$ 45.00

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April 28, 2024