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Long-Term Debt (Tables)
9 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
(Expressed in thousands)   
IssuedMaturity DateSeptember 30, 2021December 31, 2020
5.50% Senior Secured Notes10/1/2025$125,000 $125,000 
Unamortized Debt Issuance Costs(988)(1,154)
$124,012 $123,846