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Leases - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Lessee Lease Description [Line Items] |  |  |
Sublease, description of option to extend | lease amendment that provided for additional office space in Davis, CA, and extended the term through April 2025, with one option to renew for an additional five-year term. The Company initially expected to exercise its options to renew, and in accordance with ASC 842, Leases, accounted for the amendment and expected renewal as a lease modification and remeasured the operating lease liability. |  |
Operating Lease, Liability | $ 2,017,000 | $ 3,294,000 |
Right of use assets | $ 1,848,000 | 3,081,000 |
Existence of option to extend | true |  |
Lease option to extend, description | Some leases (the Davis and Dallas offices, a warehouse, and a copy machine) include one or more options to renew, with renewal terms that can extend the lease term from one to six years |  |
Operating lease term, expiration | 2024-05 |  |
Early termination fees | $ 47,000 |  |
Minimum [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Option to extend lease, term | 1 year |  |
Operating leases, term of contract | 1 year |  |
Maximum [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Option to extend lease, term | 6 years |  |
Operating leases, term of contract | 5 years |  |
ASU 2016-02 |  |  |
Lessee Lease Description [Line Items] |  |  |
Operating Lease, Liability |  | 2,800,000 |
Right of use assets |  | $ 2,600,000 |
Office Space [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Option to extend lease, term |  | 5 years | 5 years

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- Definition Indicates (true false) whether lessee has option to extend operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
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- Definition Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
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- Definition Description of terms and conditions of option to extend operating sublease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
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