Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net income	$ 76,823	$ 39,615
Adjustments to reconcile net income to net cash provided by operating activities
Share-based compensation	9,874	7,966
Depreciation and amortization	2,443	2,622
Amortization of intangibles	17,763	17,835
Amortization of debt discount	1,830	1,835
Amortization of premium on marketable securities, net	(2,365)	(917)
Realized gain on marketable securities	(7)	0
Lease payments deferred	220	320
Deferred income taxes	1,291	3,874
Changes in operating assets and liabilities
Accounts receivable, net and other contract assets	38,308	36,189
Inventories, net	(40,233)	(7,250)
Prepaid expenses and other assets	4,795	8,881
Accounts payable and accrued expenses	18,685	(24,006)
Net cash provided by operating activities	129,427	86,964
Investing activities
Purchases of marketable securities	(198,763)	(109,919)
Proceeds from sales and maturities of marketable securities	119,627	61,134
Purchases of property and equipment	(3,545)	(11,377)
Net cash used in investing activities	(82,681)	(60,162)
Financing activities
Repayment of 2024 Convertible Notes	0	(13,483)
Repurchase of common stock	0	(150,083)
Taxes paid related to net share settlement, net of proceeds from issuance of common stock under equity incentive plans	(489)	(1,048)
Net cash used in financing activities	(489)	(164,614)
Net increase (decrease) in cash, cash equivalents and restricted cash	46,257	(137,812)
Cash, cash equivalents and restricted cash at beginning of period	118,370	234,695
Cash, cash equivalents and restricted cash at end of period	164,627	96,883
Supplemental disclosure of non-cash investing and financing activities
Amounts accrued for purchases of property and equipment	1,515	390
Right-of-use assets obtained in exchange for lease obligation	1,242	406
Common stock issued for conversion of 2024 Convertible Notes	$ 0	$ 125

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.