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Income Taxes - Narrative (Details) | Dec. 31, 2022 USD ($) taxPosition | Dec. 31, 2021 USD ($) taxPosition
--- | --- | ---
Income Tax Disclosure [Line Items] |  |
Valuation allowance | $ 83,788,000 | $ 72,530,000
Number of uncertain tax positions | taxPosition | 0 | 0
Unrecognized tax benefits | $ 0 | $ 0
Penalties and interest accrued | 0 | 0
Research and development, costs capitalized | 16,560,000 |
Domestic Tax Authority |  |
Income Tax Disclosure [Line Items] |  |
Operating loss carryforwards | $ 123,922,000 | 105,722,000
Research and development, amortization period (in years) | 5 years |
State and Local Jurisdiction |  |
Income Tax Disclosure [Line Items] |  |
Operating loss carryforwards | $ 104,238,000 | $ 93,304,000
Foreign Tax Authority |  |
Income Tax Disclosure [Line Items] |  |
Research and development, amortization period (in years) | 15 years |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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