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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Jan. 01, 2019
ASU No. 2016-02 | Forecast |  |
Property, Plant and Equipment [Line Items] |  |
Operating lease, right-of-use assets |  | $ 1.3
Operating lease liabilities |  | $ 1.4
Furniture and fixtures |  |
Property, Plant and Equipment [Line Items] |  |
Useful life (in years) | 10 years |
Computer equipment |  |
Property, Plant and Equipment [Line Items] |  |
Useful life (in years) | 3 years |
Software |  |
Property, Plant and Equipment [Line Items] |  |
Useful life (in years) | 3 years |

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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