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Revenue - product sales and recycling services (Tables)
 9 Months Ended
Sep. 30, 2024
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
For the three months ended September 30, 2024For the three months ended September 30, 2023For the nine months ended September 30, 2024For the nine months ended September 30, 2023
Product revenue recognized in the period$4.3 $3.5 $10.7 $15.7 
Fair value pricing adjustments0.1 — 0.8 (6.0)
Product revenue$4.4 $3.5 $11.5 $9.7 
Recycling service revenue recognized in the period4.0 1.2 9.5 2.2 
Revenue$8.4 $4.7 $21.0 $11.9 
Contract with Customer, Contract Asset, Contract Liability, and Receivable The table below depicts the activity in the deferred revenue account during the nine months ended September 30, 2024 and twelve months ended December 31, 2023.
Product Revenue
September 30, 2024December 31, 2023
Balance, beginning of the period$— $— 
Additions7.8 — 
Revenue recognized(7.8)— 
Balance, end of the period $— $— 
Current deferred revenue— — 
Non-current deferred revenue$— $— 
Recycling Service Revenue
September 30, 2024December 31, 2023
Balance, beginning of the period$5.5 $— 
Additions— 5.4 
Foreign exchange revaluation0.3 0.1 
Balance, end of the period $5.8 $5.5 
Current deferred revenue— 0.2 
Non-current deferred revenue$5.8 $5.3