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ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 3 Months Ended
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Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Revenue from Strategic Partnering Collaboration Agreements and Research Activity Grants as a Percentage of Total Revenues | Revenues from collaboration and license agreements for the three months ended March 31, 2024 were not material. Revenues from collaboration and license agreements as a percentage of total revenues for the three months ended March 31, 2023 were as follows:
|  | Three Months Ended March 31, |  |
|  |  | 2023 |  |  |  |
Biogen MA, Inc. |  |  | 84 | % |  |  |  |
Kite Pharma, Inc. |  |  | 8 | % |  |  |  |
Novartis Institutes for BioMedical Research, Inc. |  |  | 6 | % |  |  |  |
Other license agreements |  |  | 2 | % |  |  |  |
Schedule of Cash and Cash Equivalents | A reconciliation of cash, cash equivalents, and restricted cash reported within the accompanying Condensed Consolidated Balance Sheets to the amounts reported within the accompanying Condensed Consolidated Statements of Cash Flows is as follows (in thousands):
| March 31, 2024 |  | December 31, 2023 |  | March 31, 2023 |  | December 31, 2022
Cash and cash equivalents | $ | 54,417 |  |  | $ | 45,204 |  |  | $ | 78,241 |  |  | $ | 100,444 |
Current restricted cash | 916 |  |  | — |  |  | — |  |  | — |
Non-current restricted cash | — |  |  | 1,500 |  |  | 1,500 |  |  | 1,500 |
Cash, cash equivalents, and restricted cash as reported within the Condensed Consolidated Statements of Cash Flows | $ | 55,333 |  |  | $ | 46,704 |  |  | $ | 79,741 |  |  | $ | 101,944 |
Restrictions on Cash and Cash Equivalents | A reconciliation of cash, cash equivalents, and restricted cash reported within the accompanying Condensed Consolidated Balance Sheets to the amounts reported within the accompanying Condensed Consolidated Statements of Cash Flows is as follows (in thousands):
| March 31, 2024 |  | December 31, 2023 |  | March 31, 2023 |  | December 31, 2022
Cash and cash equivalents | $ | 54,417 |  |  | $ | 45,204 |  |  | $ | 78,241 |  |  | $ | 100,444 |
Current restricted cash | 916 |  |  | — |  |  | — |  |  | — |
Non-current restricted cash | — |  |  | 1,500 |  |  | 1,500 |  |  | 1,500 |
Cash, cash equivalents, and restricted cash as reported within the Condensed Consolidated Statements of Cash Flows | $ | 55,333 |  |  | $ | 46,704 |  |  | $ | 79,741 |  |  | $ | 101,944 |

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- Definition Tabular disclosure of cash and cash equivalents restricted as to withdrawal or usage. + 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//1943274/2147479440/944-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 8 -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-8 + Details
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