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Stockholders' equity (deficit) - Summary of our Outstanding and Exercisable Warrants and Related Transactions (Details) - Warrant [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Jan. 01, 2023
Class Of Warrant Or Right [Line Items]      
Beginning balance, Warrants 536    
Exercised, Warrants (435)    
Expired, Warrants (2)    
Ending balance, Warrants 99 536  
Beginning balance, Weighted Average Exercise Price $ 13.1    
Ending balance, Weighted Average Exercise Price $ 66.61 $ 13.1  
Warrants, Aggregate Intrinsic Value $ 1,793   $ 2,427
Exercised, Weighted Average Exercise Price $ (634)    
Warrants, Weighted Average Remaining Contractual Life (in Years) 6 years 6 months 9 years 3 months 18 days  
Warrants Outstanding And Exercisable Other Than Options Warrants Weighted Average Remaining Contractual Life Exercised 4 years 6 months