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9. Income Taxes (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jan. 01, 2018 | Dec. 31, 2017
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Net operating loss carryforward, federal | $ 23,800 |  |  | $ 19,200 | $ 4,600
Net operating loss carryforward, state | 17,400 |  |  |  |
Federal and state tax credit carryforwards | 6,492 | $ 4,453 |  |  |
Unrecognized tax benefits | $ 449 | $ 309 | $ 212 |  |
Income tax, description | The legislation disallowed the use of California net operating loss deductions if the taxpayer recognizes business income and its adjusted gross income is greater than $1.0 million. The carryover periods for net operating loss deductions disallowed by this provision will be extended. The new legislation did not impact the current year provision or our financial statements for the year ended December 31, 2022. |  |  |  |
Federal and state [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Federal and state tax credit carryforwards | $ 1,500 |  |  |  |
Unrecognized tax benefits | 400 |  |  |  |
California [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Tax credit carryforwards | $ 300 |  |  |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
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