Quarterly report pursuant to Section 13 or 15(d)

Summary of Warrant Activity (Detail)

v3.21.1
Summary of Warrant Activity (Detail) - Warrants
shares in Thousands
3 Months Ended
Mar. 31, 2021
$ / shares
shares
Class Of Warrant Or Right [Line Items]  
Beginning Balance | shares 54,052
Exercised | shares (35,740)
Ending Balance | shares 18,312
Warrants exercisable at March 31, 2021 | shares 18,312
Beginning Balance | $ / shares $ 0.62
Exercised | $ / shares 0.43
Ending Balance | $ / shares 1.01
Warrants exercisable at March 31, 2021 | $ / shares $ 1.01