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Income Taxes (Net Operating Loss Carryforwards and Tax Credits) (Narrative) (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Tax Credit Carryforward [Line Items]
Operating loss carryforwards, carried forward indefinetly	$ 31,705
Federal [Member]
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	154,992
Tax credit carryforwards, research	6,747
State [Member]
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	9,600
Tax credit carryforwards, research	5,173
Foreign [Member]
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	42,668
Tax credit carryforwards, research	21,850
General foreign tax credit	84
Canada Revenue Agency [Member] | Foreign [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, research	$ 120,277

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Operating Loss Carryforwards, Carried Forward Indefinetly

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Amount of research tax credit carryforwards.

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
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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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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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