Business Combination - Total Purchase Consideration (Details) - Antares Pharma, Inc - USD ($) $ in Thousands		12 Months Ended
May 24, 2022	Dec. 31, 2022
Business Acquisition [Line Items]
Cash consideration for Antares shares outstanding as of May 24, 2022	$ 956,886
Consideration for Antares equity compensation awards	45,828
Consideration for seller transaction costs paid by Halozyme	22,906
Consideration related to Antares closing indebtedness settled by Halozyme	19,683
Cash consideration related to cash bonus awards paid by Halozyme	365
Total purchase consideration	1,045,668
Unvested equity awards attributable to the post-combination period		$ 8,700
Equity Compensation Awards, Vested
Business Acquisition [Line Items]
Consideration for Antares equity compensation awards	32,200
Equity Compensation Awards, Unvested
Business Acquisition [Line Items]
Consideration for Antares equity compensation awards	$ 13,600

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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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