Income Taxes (Tax Credit Carryforwards) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
U.S. Federal
Tax Credit Carryforward [Line Items]
Net operating loss carryforward	$ 45,375
Tax credit carryforward	1,755
State
Tax Credit Carryforward [Line Items]
Net operating loss carryforward	20,809
Tax credit carryforward	$ 1,200

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

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