Income Taxes - Summary of Operating Loss Carryforwards (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforward	$ 227,751	$ 195,133
Various states
Operating Loss Carryforwards [Line Items]
Operating loss carryforward	12,576	10,421
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforward	$ 2,050	$ 1,212

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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant