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v3.19.1

Summary of Significant Accounting Policies - Property and Equipment, Estimated Useful Lives (Detail) | 12 Months Ended
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Dec. 31, 2018
Office equipment |
Finite-Lived Intangible Assets [Line Items] |
Property and equipment useful life | 5 years
Automobiles |
Finite-Lived Intangible Assets [Line Items] |
Property and equipment useful life | 5 years
Furniture and fixtures | Minimum |
Finite-Lived Intangible Assets [Line Items] |
Property and equipment useful life | 5 years
Furniture and fixtures | Maximum |
Finite-Lived Intangible Assets [Line Items] |
Property and equipment useful life | 7 years
Leasehold improvements | Maximum |
Finite-Lived Intangible Assets [Line Items] |
Property and equipment useful life | 10 years

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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 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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- Details
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