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Long-term debt (Tables)
3 Months Ended
Mar. 31, 2022
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
(Expressed in thousands)   
IssuedMaturity DateMarch 31, 2022December 31, 2021
5.50% Senior Secured Notes
10/1/2025$125,000 $125,000 
Unamortized Debt Issuance Cost(863)(926)
$124,137 $124,074