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Warrants (Tables)
3 Months Ended
Mar. 31, 2023
Warrants and Rights Note Disclosure [Abstract]  
Summary of Warrants Outstanding to Purchase Shares
A reconciliation of the beginning and ending balance of share purchase warrants outstanding is as follows:
Number of WarrantsWeight-Average Exercise Price
Balance, December 31, 20226,352,278 $0.82 
Expired(2,227,303)0.67 
Balance, March 31, 20234,124,975 $0.89 
Summary of Warrants Outstanding And Exercisable
As of March 31, 2023, the Company had the following warrants outstanding:

Warrants OutstandingExercise PriceExpiration Date
2,999,975 $1.00 April 13, 2024
625,000 *C$0.80 October 6, 2024
500,000 *C$0.80 October 6, 2025
4,124,975 

*Represents warrants that were exercisable as of March 31, 2023.