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Stockholders’ equity (Tables)
6 Months Ended
Jun. 30, 2024
Stockholders’ Equity (Deficit) [Abstract]  
Schedule of Summarizes the Status of Our Outstanding and Exercisable Warrants As of June 30, 2024, the following table summarizes the status of our outstanding and exercisable warrants and related transactions since December 31, 2023 (in thousands, except weighted average exercise price and weighted average remaining contractual life data):
   Warrants Outstanding and exercisable 
   Warrants   Weighted Average
Exercise
Price
   Aggregate
Intrinsic
Value
   Weighted Average Remaining Contractual Life (in Years) 
As of January 1, 2024   99   $66.61   $
  —
    6.5 
Expired   (2)   281.50    
    
 
As of June 30, 2024   97   $63.33   $
    6.1 
Schedule of Summarizes the Status of Our Outstanding and Exercisable Options and Related Transactions The following table summarizes the status of our outstanding and exercisable options and related transactions since December 31, 2023 (in thousands, except weighted average exercise price and weighted average remaining contractual life data):
   Outstanding   Exercisable 
   Options
Awards
   Weighted
Average
Exercise
Price
   Aggregate
Intrinsic
Value
   Weighted
Average
Remaining
Contractual
Life
(in Years)
   Options
Awards
   Weighted
Average
Exercise
Price
   Aggregate
Intrinsic
Value
   Weighted
Average
Remaining
Contractual
Life
(in Years)
 
As of January 1, 2024   72   $258.55    
    3.0    73   $258.46    
    3.0 
Expired   (9)   217.57                         
As of June 30, 2024   63   $264.14    
    2.9    64   $264.02    
    2.9 
Schedule of the Status of our Unvested and Related Transactions The following table summarizes the status of our RSUs and related transactions since December 31, 2023 (in thousands, except weighted average grant date fair value):
   RSUs awards outstanding 
   RSUs   Weighted
Average
Grant Date
Fair Value
   Aggregate
Intrinsic
Value
 
As of January 1, 2024   40   $9.67    89.60 
Vested   (2)   23.42    
 
As of June 30, 2024   38   $9.01   $60.73 
   Outstanding 
   PSUs (1)   Weighted
Average
Grant Date
Fair Value
   Aggregate
Intrinsic
Value
 
Unvested, as of January 1, 2024   14   $50.87   $32.57 
Vested   (7)   60.50    16.16 
Cancelled/Forfeited   (2)   58.68    
 
Unvested, as of June 30, 2024   5   $34.50   $8.37 
(1)The number of PSUs represents the base number of PSUs that may vest.