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Income Taxes (Narrative) (Details) $ in Millions	Dec. 31, 2020 USD ($)
Domestic Tax Authority
Tax Credit Carryforward [Line Items]
Domestic operating loss carryforwards	$ 27.0
Domestic Tax Authority | Limitations On Use To Section 382 [Member]
Tax Credit Carryforward [Line Items]
Domestic operating loss carryforwards	56.0
Foreign Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Foreign operating loss carryforwards	10.0
Foreign Tax Authority [Member] | Research Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Foreign research and development tax credit carryforwards	$ 2.7

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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