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Summary of Significant Accounting Policies - Additional Information (Details) | 12 Months Ended |
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Dec. 31, 2021 USD ($) segment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jan. 01, 2021 USD ($)
Accounting Policies [Line Items] |  |  |  |
Percentage of revenue contributed by related party | 100.00% | 100.00% | 100.00% |
Number of operating segments | segment | 1 |  |  |
Number of reportable segments | segment | 1 |  |  |
Debt instrument remaining maturity period at date of purchase | 3 months |  |  |
Impairment of long-lived assets | $ 0 | $ 0 | $ 0 |
Expected dividends | 0.00% | 0.00% | 0.00% |
Operating lease right-of-use assets | $ 6,330,000 | $ 0 |  |
Total operating lease liabilities | $ 7,194,000 |  |  |
Novartis Agreement |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Description of customer payment terms | The Company performs credit evaluations of its customer, and the risk with respect to accounts receivable is further mitigated by the short duration of customer payment terms, generally within 60 days, and the pedigree of the customer base. |  |  |
Accounting Standards Update 2016-02 |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Operating lease right-of-use assets |  |  |  | $ 8,000,000
Total operating lease liabilities |  |  |  | 8,900,000
Deferred rent and lease incentives |  |  |  | $ 900,000

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- Definition Amount of excess of rental payment required by lease over rental income recognized, classified as current. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 25 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123408481&loc=SL77919140-209958 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123415192&loc=d3e39927-112707 + Details
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