Income Taxes - Net Operating Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Federal
Operating Loss Carryforwards [Line Items]
Net Operating Losses	$ 36,006	$ 76,919
State
Operating Loss Carryforwards [Line Items]
Net Operating Losses	$ 40,806	$ 65,583

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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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant