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Summary of Significant Accounting Policies Intangible asset (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, net | $ 19,716,000 | $ 0
Finite-lived Intangible Assets, Fair Value Disclosure |  | $ 18,500,000
Goodwill and Intangible Asset Impairment | $ 28,638,000 |

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- Definition Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
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- Definition Amount after accumulated amortization of finite-lived and indefinite-lived intangible assets classified as other. + References No definition available. + Details
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