Summary of Significant Accounting Policies - Revenue and Cost of Product Sales (Details)	9 Months Ended
Sep. 30, 2022
Accounting Policies [Abstract]
Period of contract termination by written notice	90 days

Revenue, Remaining Performance Obligation, Period Of Termination By Written Notice

No definition available.

Name:	halo_RevenueRemainingPerformanceObligationPeriodOfTerminationByWrittenNotice
Namespace Prefix:	halo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration