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Organization and description of business operations - November 2021 Offering (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Oct. 26, 2022
Aug. 04, 2022
Aug. 03, 2022
Dec. 31, 2021
Nov. 09, 2021
Nov. 05, 2021
Nov. 02, 2021
Dec. 31, 2022
Dec. 31, 2021
Nov. 08, 2022
Nov. 07, 2022
Jul. 27, 2022
May 18, 2020
Class of Warrant or Right [Line Items]                          
Share issue price             $ 32.00            
Initial exercise price   $ 6.00                      
Issuance of common stock and warrants, net of issuance costs (in shares) 36,166 931,667 36,196       426,500            
Granted               108,650          
Common shares outstanding       1,272,383 539,063   468,750 2,670,856 1,272,383 2,971,439 148,571,994   27,347
Shares per warrant             1            
Warrant exercise price           $ 35.00              
Number of warrants exercised       0                  
Term of warrants   5 years                      
Proceeds from the issuance of common stock and warrants, net of issuance costs   $ 6,900                      
Decrease in exercise price of warrant and right outstanding   $ 1.00     $ 1.00                
Maximum                          
Class of Warrant or Right [Line Items]                          
Granted         539,063                
November 2021                          
Class of Warrant or Right [Line Items]                          
Warrant exercise price         $ 35.00                
Number of warrants exercised               0 0        
November 2021 | Maximum                          
Class of Warrant or Right [Line Items]                          
Granted         539,063                
Prefunded warrants                          
Class of Warrant or Right [Line Items]                          
Share issue price   6.00                      
Initial exercise price   $ 0.005         $ 31.95         $ 0.005  
Granted   401,667         42,250            
Shares per warrant   1         1            
Underwriting Agreement                          
Class of Warrant or Right [Line Items]                          
Share issue price             $ 32.00            
Initial exercise price         $ 15.50                
Issuance of common stock and warrants, net of issuance costs (in shares)             426,500            
Common shares outstanding         539,063                
Proceeds from the issuance of common stock and warrants, gross         $ 17,250                
Proceeds from the issuance of common stock and warrants, net of issuance costs         $ 15,800                
Underwriting Agreement | Maximum                          
Class of Warrant or Right [Line Items]                          
Granted         539,063                
Underwriting Agreement | November 2021                          
Class of Warrant or Right [Line Items]                          
Warrant exercise price           $ 35.00              
Number of warrants exercised               0          
Term of warrants           5 years              
Underwriting Agreement | Prefunded warrants                          
Class of Warrant or Right [Line Items]                          
Initial exercise price             $ 31.95            
Granted             1            
Shares per warrant             1            
Warrant exercise price           $ 0.05