Accrued expenses - Schedule of accounts payable and accrued liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Accrued payroll and employee benefits	$ 14,355	$ 13,592
Accrued interest	8,768	7,311
Accrued taxes	7,779	7,278
Accrued professional fees	2,839	4,102
Accrued other expenses	2,878	4,743
Total accrued expenses	36,619	37,026
Forbearance Agreements
Debt Instrument [Line Items]
Accrued interest	$ 3,700	$ 2,700