Lease contracts - Summary of Operating Leases Future Minimum Payments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Current portion	$ 482	$ 1,284
Year 2	1,487	75
Year 3	1,302	421
Thereafter	5,804	5,515
Total minimum lease payments	9,075	7,295
Less: Effects of discounting	(1,664)	(1,626)
Present value of lease liabilities	7,412	5,670
Less: current portion	(374)	(1,144)
Long-term lease liabilities	7,038	4,526
Increase (decrease) in operating lease liability, noncurrent	1,700
Real Estate
Lessee, Lease, Description [Line Items]
Current portion	450	1,205
Year 2	1,480	65
Year 3	1,295	421
Thereafter	5,794	5,515
Total minimum lease payments	9,019	7,205
Less: Effects of discounting	(1,652)	(1,617)
Present value of lease liabilities	7,367	5,588
Less: current portion	(350)	(1,072)
Long-term lease liabilities	$ 7,017	$ 4,516
Weighted average remaining lease term (years)	7 years 8 months 19 days	7 years 6 months 14 days
Weighted average discount rate	5.12%	4.53%
Other assets
Lessee, Lease, Description [Line Items]
Current portion	$ 32	$ 79
Year 2	7	11
Year 3	7	0
Thereafter	10	0
Total minimum lease payments	56	90
Less: Effects of discounting	(11)	(9)
Present value of lease liabilities	45	82
Less: current portion	(24)	(72)
Long-term lease liabilities	$ 21	$ 10
Weighted average remaining lease term (years)	7 days	0 years
Weighted average discount rate	0.03%	2.50%

Increase (Decrease) In Operating Lease Liability, Noncurrent

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Lessee, Operating Lease, Liability, to be Paid, Due after Year Two

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of lessee's undiscounted obligation for lease payment for operating lease.

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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