| Leases (Details) $ in Millions | 3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
| Jun. 30, 2022  USD ($)  period | Jun. 30, 2021  USD ($) | Jun. 30, 2022  USD ($)  period | Jun. 30, 2021  USD ($) | |
| Lessee, Lease, Description [Line Items] | ||||
| Lessee, operating lease, number of renewal periods | period | 2 | 2 | ||
| Lease cost | $ | $ 0.1 | $ 0.1 | $ 0.3 | $ 0.3 | 
| Office Lease - Irvine, California | ||||
| Lessee, Lease, Description [Line Items] | ||||
| Renew the lease for two additional periods | 5 years | 5 years | ||
| Lessee, operating lease, term of contract (in years) | 5 years | 5 years | ||
| Office Lease - Solana Beach, California | ||||
| Lessee, Lease, Description [Line Items] | ||||
| Renew the lease for two additional periods | 5 years | 5 years | ||
| Lessee, operating lease, term of contract (in years) | 5 years | 5 years | ||
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- Definition Lessee, Operating Lease, Renewal Term, Number of Renewals No definition available. 
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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 Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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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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- Details 
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