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Income Taxes - Schedule of Research and Development Credit Carryforwards (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Federal
Income Tax Disclosure [Line Items]
R&D credits	$ 632	$ 467
California
Income Tax Disclosure [Line Items]
R&D credits	$ 117	$ 91

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Income tax disclosure.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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