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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