Annual report pursuant to Section 13 and 15(d)

Summary of Warrant Activity (Detail)

v3.23.1
Summary of Warrant Activity (Detail) - $ / shares
shares in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Class Of Warrant Or Right [Line Items]      
Beginning Balance $ 62.01 $ 74.00 $ 144.25
Ending Balance $ 74.95 $ 62.01 $ 74.00
Warrants      
Class Of Warrant Or Right [Line Items]      
Beginning Balance 720 2,168 83
Granted or Issued 2,132   2,240
Exercised 727 (1,432) (154)
Forfeited, cancelled, or expired 31 (16) (1)
Ending Balance 2,094 720 2,168
Warrants exercisable at December 31, 2022 2,094    
Vested warrants expired during the 12 months ended December 31, 2022 (31)    
Beginning Balance $ 19.98 $ 15.50 $ 157.50
Granted or Issued 3.05   10.50
Exercised   10.75 10.00
Forfeited, cancelled, or expired 225.00 250.00 500.00
Ending Balance 10.17 $ 19.98 $ 15.50
Warrants exercisable at December 31, 2022 10.17    
Vested warrants expired during the 12 months ended December 31, 2022 $ 225.00