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Deferred revenue (Tables)
 3 Months Ended
Mar. 31, 2024
Revenue Recognition and Deferred Revenue [Abstract]  
Contract with Customer, Contract Asset, Contract Liability, and Receivable The table below depicts the activity in the deferred revenue account during the three months ended March 31, 2024 and 2023.
Product revenue
As atMarch 31, 2024December 31, 2023
Balance, beginning of the period
$— $— 
Additions
2.8 — 
Revenue recognized(0.6)— 
Balance, end of the period
$2.2 $— 
Current deferred revenue2.2 — 
Non-current deferred revenue$— $— 
Service revenue
As atMarch 31, 2024December 31, 2023
Balance, beginning of the period$5.5 $— 
Additions— 5.4 
Foreign exchange gain (loss) (0.1)0.1 
Balance, end of the period (to be recognized over a period of five years)
$5.4 $5.5 
Current deferred revenue0.2 0.2 
Non-current deferred revenue$5.2 $5.3