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

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration