Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Operating activities
Net income	$ 150,049	$ 118,095
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	16,637	10,673
Depreciation and amortization	4,221	2,687
Amortization of intangible assets	29,512	17,762
Amortization of debt discount	2,245	1,846
Accretion of premium on marketable securities, net	(30)	(1,709)
Lease payments recognized	214	253
Deferred income taxes	3,428	(2,858)
Changes in operating assets and liabilities
Accounts receivable, net and contract assets	(19,547)	3,834
Inventories	27,379	(586)
Prepaid expenses and other assets	(9,108)	(4,995)
Accounts payable and accrued expenses	(24,922)	9,219
Net cash provided by operating activities	180,078	154,221
Investing activities
Purchases of marketable securities	(8,846)	(139,639)
Proceeds from sales and maturities of marketable securities	9,000	50,167
Proceeds from working capital adjustments on acquisition	710	0
Purchases of property and equipment	(3,741)	(950)
Net cash used in investing activities	(2,877)	(90,422)
Financing activities
Taxes paid related to net share settlement, net of proceeds from issuance of common stock under equity incentive plans	(1,613)	(3,321)
Net cash used in financing activities	(1,613)	(3,321)
Net increase in cash and cash equivalents	175,588	60,478
Cash and cash equivalents at beginning of period	136,421	115,850
Cash and cash equivalents at end of period	312,009	176,328
Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets
Cash and cash equivalents	309,749	176,328
Restricted cash	2,260	0
Total cash, cash equivalents and restricted cash	312,009	176,328
Supplemental disclosure of non-cash investing and financing activities
Amounts accrued for purchases of property and equipment	1,747	488
Right-of-use assets obtained in exchange for lease obligation	$ 170	$ 95

Deferred Rent Payments

No definition available.

Name:	halo_DeferredRentPayments
Namespace Prefix:	halo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.