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Income Taxes - Reconciliation of Federal Statutory Rate to Effective Tax Rate (Details) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |
U.S. federal tax benefit at statutory rate | 21.00% | 21.00%
State income taxes, net of federal benefit | 11.80% | 3.50%
Non-deductible expenses and other | (0.30%) | 0.30%
Stock-based compensation | (1.10%) | (1.50%)
Research and development credits | 1.20% | 2.50%
Transaction cost | 3.90% | 0.00%
Foreign rate differential | (3.10%) | (4.30%)
Change in valuation allowance, net | (33.40%) | (21.50%)
Effective tax rate | 0.00% | 0.00%

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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