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Long-term debt - Schedule of Long-Term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Sep. 22, 2020
Debt Instrument [Line Items]      
Unamortized Debt Issuance Cost $ (556) $ (616)  
Long-term debt 112,494 113,434  
5.50% Senior Secured Notes      
Debt Instrument [Line Items]      
Long-term debt, gross $ 113,050 $ 114,050  
5.50% Senior Secured Notes | Senior Secured Notes      
Debt Instrument [Line Items]      
Stated interest rate (as a percent)     5.50%