Income Taxes - NOLs, credits (Details) - USD ($) $ in Millions |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Federal | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | $ 228.8 | |
| State and Local Jurisdiction | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | 316.8 | |
| Research and development | ||
| Operating Loss Carryforwards [Line Items] | ||
| Tax credits | $ 10.1 | $ 7.9 |
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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