v3.19.3.a.u2

Income Taxes - Schedule of Reconciliation of Statutory Federal Income Tax Rate to Effective Tax Rate (Details) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
U.S. federal income tax at statutory rate | 21.00% | 21.00% | 34.00%
U.S. state and local income taxes | (0.40%) | (1.30%) | (0.20%)
Change in valuation allowance | (213.40%) | (1039.40%) | 19.00%
Federal research and development tax credit | 30.80% | 166.20% | 5.20%
Convertible preferred stock warrants |  |  | (21.70%)
Stock-based compensation | 158.00% | 859.40% | 1.20%
Meals and Entertainment | (1.40%) | (6.60%) | (1.10%)
Permanent items |  | (1.10%) |
Foreign rate differential | (0.60%) | (1.50%) | 0.20%
Acquisition costs | (1.30%) |  |
Section 162(m) limitation | (1.40%) |  |
State apportionment change | 1.30% |  |
Tax rate change | (0.40%) | 2.40% | (36.40%)
Provision to return true-up | 9.90% | 5.90% |
Other | (0.50%) | 0.10% | (0.70%)
Effective tax rate | 1.60% | 5.10% | (0.50%)

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