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Certain Balance Sheet Items - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Balance Sheet Related Disclosures [Abstract]
Depreciation and amortization	$ 2,687	$ 2,443
Right-of-use asset amortization	1,500	1,400
Expense associated with accretion of lease liabilities	500	600
Total operating lease cost	2,000	2,000
Cash paid for amounts related to leases	$ 1,800	$ 1,800

X

- Definition

Operating Lease, Accretion Of Liability

+ References

No definition available.

+ Details

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Namespace Prefix:	halo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

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X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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X

- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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X

- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
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X

- Definition

Amount of periodic reduction over lease term of carrying amount of right-of-use asset from operating lease.

+ References

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