Not sure your facts are entirely accurate. The 1,505,442 broker warrants issued via the "bought deal" in March 2018 had an expiry of March 21, 2020 with a strike price of $0.425 USD. These were included in the extension to July 2020, not the Espresso warrants. The 3,289,500 warrants issued to Espresso Capital as a financing sweetener were issued in 2019 and expire in 2023 and have a strike price of $0.50 CAD.
If you check the notes to the financial statements for both 2018 and 2019 you'll find all the relevant information with respect to warrants and options etc.
regards,
Hogan