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Organization and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Schedule of Revenue from Strategic Partnering Collaboration Agreements and Research Activity Grants as a Percentage of Total Revenues | Revenues from major collaboration agreements and research activity grants as a percentage of total revenues were as follows:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
Pfizer Inc. | 40 | % |  | 40 | % |  | 47 | %
Kite Pharma, Inc. | 24 | % |  | 34 | % |  | 30 | %
Biogen MA, Inc. | 24 | % |  | — |  |  | — |
Sanofi Genzyme | 5 | % |  | 22 | % |  | 16 | %
Novartis Institutes for BioMedical Research, Inc. | 4 | % |  | — |  |  | — |
Schedule of Cash and Cash Equivalents | A reconciliation of cash, cash equivalents and restricted cash reported within the accompanying Consolidated Balance Sheets to the amounts reported within the accompanying Consolidated Statements of Cash Flows is as follows (in thousands):
| As of December 31,
| 2020 |  | 2019 |  | 2018 |  |
Cash and cash equivalents | $ | 131,329 |  |  | $ | 80,428 |  |  | $ | 140,418 |  |  |
Non-current restricted cash | 1,500 |  |  | 1,500 |  |  | 3,500 |  |  |
Cash, cash equivalents and restricted cash as reported within the Consolidated Statements of Cash Flows | $ | 132,829 |  |  | $ | 81,928 |  |  | $ | 143,918 |  |  |
Restrictions on Cash and Cash Equivalents | A reconciliation of cash, cash equivalents and restricted cash reported within the accompanying Consolidated Balance Sheets to the amounts reported within the accompanying Consolidated Statements of Cash Flows is as follows (in thousands):
| As of December 31,
| 2020 |  | 2019 |  | 2018 |  |
Cash and cash equivalents | $ | 131,329 |  |  | $ | 80,428 |  |  | $ | 140,418 |  |  |
Non-current restricted cash | 1,500 |  |  | 1,500 |  |  | 3,500 |  |  |
Cash, cash equivalents and restricted cash as reported within the Consolidated Statements of Cash Flows | $ | 132,829 |  |  | $ | 81,928 |  |  | $ | 143,918 |  |  |

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- Definition Schedule Of Revenue From Strategic Partnering Collaboration Agreements And Research Activity Grants As A Percentage Of Total Revenues + References No definition available. + Details
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