Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Operating activities
Net income	$ 118,095	$ 76,823
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	10,673	9,874
Depreciation and amortization	2,687	2,443
Amortization of intangible assets	17,762	17,763
Amortization of debt discount	1,846	1,830
Accretion of premium on marketable securities, net	(1,709)	(2,365)
Realized gain on marketable securities	0	(7)
Lease payments recognized	253	220
Deferred income taxes	(2,858)	1,291
Changes in operating assets and liabilities
Accounts receivable, net and other contract assets	3,834	38,308
Inventories	(586)	(40,233)
Prepaid expenses and other assets	(4,995)	4,795
Accounts payable and accrued expenses	9,219	18,685
Net cash provided by operating activities	154,221	129,427
Investing activities
Purchases of marketable securities	(139,639)	(198,763)
Proceeds from sales and maturities of marketable securities	50,167	119,627
Purchases of property and equipment	(950)	(3,545)
Net cash used in investing activities	(90,422)	(82,681)
Financing activities
Taxes paid related to net share settlement, net of proceeds from issuance of common stock under equity incentive plan	(3,321)	(489)
Net cash used in financing activities	(3,321)	(489)
Net increase in cash, cash equivalents and restricted cash	60,478	46,257
Cash, cash equivalents and restricted cash at beginning of period	115,850	118,370
Cash, cash equivalents and restricted cash at end of period	176,328	164,627
Supplemental disclosure of non-cash investing and financing activities
Amounts accrued for purchases of property and equipment	488	1,515
Right-of-use assets obtained in exchange for lease obligation	$ 95	$ 1,242

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.