Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Liabilities (Parenthetical) (Details) $ in Millions	Dec. 31, 2024 USD ($)
Payables and Accruals [Abstract]
Accrued severance, bonus, and retention	$ 2.1

Accrued severance, bonus, and retention costs, current.

No definition available.

Name:	pvla_AccruedSeveranceBonusAndRetentionCostsCurrent
Namespace Prefix:	pvla_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant