Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.21.2
Subsequent Events - Additional Information (Detail) - Subsequent Event - NIDA
1 Months Ended
Aug. 01, 2021
USD ($)
Jul. 31, 2021
USD ($)
Adult
Subsequent Event [Line Items]    
Grant received $ 320,000  
Next stage of grant award expected to receive upon completion of milestones   $ 2,500,000
Number of adult nicotine e-cigarette users | Adult   150