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Long-term debt - Purchase warrants issued to CIBC (Details) - CIBC loan $ in Thousands |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 14, 2023 USD ($) $ / shares shares | Nov. 03, 2022 $ / shares shares | Jul. 30, 2018 $ / shares shares | Dec. 31, 2022 USD ($) $ / shares
November 3, 2022 |  |  |  |
Long-term debt |  |  |  |
Number of warrants issued |  | 47,287 |  |
Number of common share that each warrant entitles the holder |  | 1 |  |
Purchase warrant price per common share | $ / shares |  | $ 5.29 |  |
Term of the warrant |  | 10 years |  |
Exercise of warrants (shares) | 34,537 |  |  |
Fair value of warrants | $ | $ 568 |  |  | $ 418
Variables used to determine the fair value of warrants |  |  |  |
Share price | $ / shares | $ 19.16 |  |  | $ 14.48
Volatility | 70.00% |  |  | 70.00%
Expected life of warrants | 6 years 4 months 24 days |  |  | 6 years 10 months 24 days
Risk free interest rate | 3.52% |  |  | 3.30%
July 30, 2018 |  |  |  |
Long-term debt |  |  |  |
Number of warrants issued |  |  | 32,171 |
Number of common share that each warrant entitles the holder |  |  | 1 |
Purchase warrant price per common share | $ / shares |  |  | $ 9.70 |
Term of the warrant |  |  | 60 months |
Exercise of warrants (shares) | 16,266 |  |  |
Fair value of warrants | $ | $ 227 |  |  | $ 145
Variables used to determine the fair value of warrants |  |  |  |
Share price | $ / shares | $ 19.60 |  |  | $ 14.48
Volatility | 80.00% |  |  | 84.00%
Expected life of warrants | 1 month 6 days |  |  | 7 months 6 days
Risk free interest rate | 4.52% |  |  | 4.07%

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- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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