Income Taxes [Line Items]

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- Definition

Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYYformat.

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- Definition

Expiration date of the tax credit carryforward, in CCYY format.

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- Definition

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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- Definition

Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Income (loss) before taxes from U.S. operations	$ (275,400)	$ 28,900	$ (84,800)
Income before taxes from foreign operations	$ 800	$ 600	$ 900
Statutory tax rate	21.00%	21.00%	21.00%
Deferred income taxes	$ (93,649)
Valuation allowance	366,940	$ 300,505
Net operating loss carryforwards	378,000
Research and development credit carryforward	60,700
Total unrecognized tax benefit	8,335	5,954	$ 21,979	$ 20,447
Accrued interest or penalties	0	$ 0
Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	1,491,300
Research and development credit carryforward	$ 39,100
Research and development tax credit carryforward, expiration	2024
Federal [Member] \| With Expiration [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	$ 774,900
State [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	997,400
Research and development credit carryforward	$ 36,900
Minimum [Member] \| Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforward, expiration	2024