Fair value measurements - Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets:
Cash and cash equivalents	$ 70,651	$ 221,755
Beneficiary interest in factored invoices	1,062	560
Other non-current liabilities
Total	72,700	222,315
Warrants
Other non-current liabilities
Warrant liability	987
Quoted prices in active markets (Level 1)
Assets:
Cash and cash equivalents	70,651	221,755
Beneficiary interest in factored invoices	0	0
Other non-current liabilities
Total	70,651	221,755
Quoted prices in active markets (Level 1) | Warrants
Other non-current liabilities
Warrant liability	0
Significant other observable inputs (Level 2)
Assets:
Cash and cash equivalents	0	0
Beneficiary interest in factored invoices	0	0
Other non-current liabilities
Total	0	0
Significant other observable inputs (Level 2) | Warrants
Other non-current liabilities
Warrant liability	0
Significant unobservable inputs (Level 3)
Assets:
Cash and cash equivalents	0	0
Beneficiary interest in factored invoices	1,062	560
Other non-current liabilities
Total	2,049	$ 560
Significant unobservable inputs (Level 3) | Warrants
Other non-current liabilities
Warrant liability	$ 987