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Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets/(liabilities) |  |
Tax attribute carryovers | $ 43,971,000 | $ 27,644,000
Valuation allowance | (46,998,000) | (29,771,000)
Net deferred tax assets/(liabilities) | 0 | 0
Deferred tax assets: |  |
Net operating loss carry forward | 43,971,000 | 27,644,000
Tax credits | 2,397,000 | 1,473,000
Accruals and reserves | 1,671,000 | 2,063,000
Stock-based compensation | 23,000 | 0
Other | 2,000 | 1,000
Total deferred tax assets | 48,064,000 | 31,181,000
Valuation allowance | (46,998,000) | (29,771,000)
Total deferred tax asset | 1,066,000 | 1,410,000
Deferred tax liabilities: |  |
Depreciation and amortization | 1,066,000 | 1,410,000
Total deferred tax liabilities | 1,066,000 | 1,410,000
Net deferred tax assets (liabilities) | 0 | 0
Gores Metropoulos, Inc. |  |
Deferred tax assets/(liabilities) |  |
Tax attribute carryovers | 32,591 | 5,635
Valuation allowance | (30,238) | (5,635)
Net deferred tax assets/(liabilities) | 2,353 | 5,635
Deferred tax assets: |  |
Net operating loss carry forward | 32,591 | 5,635
Valuation allowance | (30,238) | (5,635)
Deferred tax liabilities: |  |
Net deferred tax assets (liabilities) | $ 2,353 | $ 5,635

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