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BUSINESS OVERVIEW AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) segment tranche | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Capitalized cost | $ 30.6 |  |
Payment term after customer control | 1 year |  |
Period between customer control and payment | 1 year |  |
Advertising expenses | $ 27.8 | $ 25.2 | $ 30.2
Number of tranches in offering period | tranche | 4 |  |
Span of offering period | 24 months |  |
Foreign currency transaction losses | $ 27.7 | $ 11.4 | $ 11.7
Number of reportable segment | segment | 1 |  |
Number of operating segments | segment | 1 |  |
Minimum | ALDURAZYME |  |  |
Significant Accounting Policies [Line Items] |  |  |
Payment received as percentage of net product sales | 39.50% |  |
Maximum | ALDURAZYME |  |  |
Significant Accounting Policies [Line Items] |  |  |
Payment received as percentage of net product sales | 50.00% |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 720 -SubTopic 35 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483406/720-35-50-1 + Details
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