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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Income Taxes |  |
Benefit from income taxes | $ (188) |
Effective tax rate | (1.20%) | 0.00%
Excess tax benefits of stock-based compensation | $ 1,527 |
State income tax expense | 1,339 |
Federal current income tax expense | 0 | $ 0
Deferred tax expense | $ 0 | $ 0

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