Quarterly report pursuant to Section 13 or 15(d)

Summary of Warrant Activity (Detail)

v3.22.2.2
Summary of Warrant Activity (Detail) - Warrants
 9 Months Ended
Sep. 30, 2022
$ / shares
shares
Class Of Warrant Or Right [Line Items]  
Beginning Balance | shares 17,996,000
Granted or Issued | shares 2,132,000
Exercised | shares (178,000)
Forfeited, cancelled, or expired | shares (785,000)
Ending Balance | shares 19,165,000
Warrants exercisable at September 30, 2022 | shares 19,165,000
Vested warrants expired during the period ended September 30, 2022 | shares (785,000)
Beginning Balance | $ / shares $ 19.98
Granted or Issued | $ / shares 3.05
Exercised | $ / shares 0
Forfeited, cancelled, or expired | $ / shares 225.00
Ending Balance | $ / shares 9.88
Warrants exercisable at September 30, 2022 | $ / shares 9.88
Vested warrants expired during the period ended JSeptember 30, 2022 | $ / shares $ 225.00