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Commitment and contingencies (Details) - USD ($)
1 Months Ended 12 Months Ended
Aug. 05, 2022
Aug. 13, 2020
Sep. 30, 2022
Nov. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Nov. 30, 2020
Apr. 30, 2020
Other Commitments [Line Items]                
Warrants outstanding (in shares)     17,920,898          
Warrants, exercise price (in usd per share)     $ 7.91          
Lease term     12 months 10 years 6 months        
Operating lease right-of-use assets recognized in exchange for new operating lease obligations     $ 200,000 $ 6,800,000        
Long-term Debt     15,144,000   $ 12,453,000      
Notes Payable, Other Payables [Member] | Directors And Officers Insurance Financing [Member]                
Other Commitments [Line Items]                
Debt Instrument, Face Amount $ 2,800,000              
Debt Instrument, Periodic Payment $ 289,777              
Debt Instrument, Interest Rate, Stated Percentage 4.24%              
Debt Instrument, Term 9 months              
Long-term Debt     $ 2,000,000          
Preferred stock warrants                
Other Commitments [Line Items]                
Warrants outstanding (in shares)     3,247,637          
Warrants vested, percentage   40.00%            
Warrants, exercise price (in usd per share)             $ 2.16  
Warrants             $ 1,100,000  
Warrants vested, fair value         0      
Warrants, number of shares issuable (in shares)     2,889,282       3,247,637  
D-Wave Systems Inc. [Member]                
Other Commitments [Line Items]                
Lease term       10 years 6 months        
Operating lease right-of-use assets recognized in exchange for new operating lease obligations       $ 6,700,000 11,870,000 $ 4,932,000    
Long-term Debt         $ 12,453,000 $ 1,676,000    
D-Wave Systems Inc. [Member] | Preferred stock warrants                
Other Commitments [Line Items]                
Warrants outstanding (in shares)         3,247,637 1,100,000 3,247,637  
Warrants vested, percentage   40.00%            
Warrants, exercise price (in usd per share)             $ 1.92  
Warrants vested, fair value         $ 0 $ 451,000    
Warrants vested during period           $ 451,000    
D-Wave Systems Inc. [Member] | Common stock warrants                
Other Commitments [Line Items]                
Warrants outstanding (in shares)         617,972     617,972
Warrants, exercise price (in usd per share)         $ 1.75     $ 1.75