Organization and significant accounting policies - Summary of Remaining Performance Obligations (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Rental revenue
Revenue, remaining performance obligation, amount	$ 900
Service revenue
Revenue, remaining performance obligation, amount	50
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Rental revenue
Revenue, remaining performance obligation, amount	$ 900
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Service revenue
Revenue, remaining performance obligation, amount	$ 50
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Rental revenue
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Service revenue
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year