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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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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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