| Commitments - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended | |
|---|---|---|
| Dec. 31, 2021 | Dec. 31, 2020 | |
| Operating lease, weighted average remaining lease term | 4 years 9 months | |
| Operating lease, weighted average discount rate, percent | 8.60% | |
| Lease, cost | $ 0.5 | $ 0.2 | 
| Office Lease - Irvine, California | ||
| Lessee, operating lease, term of contract | 5 years | |
| Lessee, operating lease, renewal term | 5 years | |
| Office Lease - Solana Beach, California | ||
| Lessee, operating lease, term of contract | 5 years | |
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- Definition Amount of lease cost recognized by lessee for lease contract. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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- Details 
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