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Summary of Significant Accounting Policies - Additional Information (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 USD ($) lease financialInstitution | Dec. 31, 2022 USD ($) lease financialInstitution | Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items] |  |  |
Cash and cash equivalents | $ 106,745,000 | $ 106,745,000 | $ 86,863,000
Number of financial institutions used for cash deposits | financialInstitution | 2 | 2 |
Depreciation and amortization expense |  | $ 77,000 | 85,000
Impairment losses |  | 0 | 0
Goodwill impairment | $ 33,000,000 | $ 32,970,000 | 0
Government assistance rate |  | 43.50% |
Government assistance, amount |  | $ 2,300,000 | $ 1,700,000
Government Assistance, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Nonoperating Income (Expense) | Nonoperating Income (Expense)
Number of existing operating leases | lease | 2 | 2 |
Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life (in years) |  | 3 years |
Lease term (in months) | 12 months | 12 months |
Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life (in years) |  | 13 years |
Lease term (in months) | 60 months | 60 months |
United States |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cash and cash equivalents | $ 85,700,000 | $ 85,700,000 |
United States | Money market funds |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Investment interest rate | 4.30% | 4.30% |
Australia and Germany | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Investment interest rate | 0.00% | 0.00% |
Australia and Germany | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Investment interest rate | 0.87% | 0.87% |
Germany |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cash and cash equivalents | $ 19,100,000 | $ 19,100,000 |
Germany | Minimum | Time Deposits |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Investment interest rate | 0.61% | 0.61% |
Earning interest at a rate maturity (in months) |  | 3 months |
Germany | Maximum | Time Deposits |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Investment interest rate | 0.87% | 0.87% |
Earning interest at a rate maturity (in months) |  | 4 months |
Australia |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cash and cash equivalents | $ 1,900,000 | $ 1,900,000 |

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