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Restricted Cash - Restricted cash on the Company's consolidated balance sheets (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024
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Restricted Cash and Cash Equivalents Items [Line Items] |  |  |  |
Restricted Cash, Noncurrent |  | $ 2,903 | $ 2,903 | $ 0
Redwood City, CA lease [Member] |  |  |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |  |  |
Restricted Cash, Noncurrent | [1] | 2,337 | 2,337 |
Boston, MA |  |  |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |  |  |
Restricted Cash, Noncurrent |  | 266 | 266 |
Corporate credit card services |  |  |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |  |  |
Restricted Cash, Noncurrent |  | $ 300 | $ 300 |
[1] | Includes the Company's lease at 1000 Bridge Parkway and 1200 Bridge Parkway.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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- Definition Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 5 -SubTopic 210 -Topic 954 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477220/954-210-45-5 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-8 + Details
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