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Long-term debt (Tables)
9 Months Ended
Sep. 30, 2023
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
(Expressed in thousands)   
IssuedMaturity DateSeptember 30, 2023December 31, 2022
5.50% Senior Secured Notes
10/1/2025$113,050 $114,050 
Unamortized Debt Issuance Cost(447)(616)
$112,603 $113,434