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Goodwill and Other Intangible Assets - Details of Intangible Assets (Detail) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
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Indefinite-lived Intangible Assets [Line Items] |  |
Total intangible assets | $ 11,227 | $ 11,227
Total accumulated amortization | (5,499) | (5,185)
Intangible assets, net | 5,728 | 6,042
Domain Names [Member] |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Total intangible assets | 6,327 | 6,327
Total accumulated amortization | (599) | (285)
Customer Backlog [Member] |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Total intangible assets | 4,000 | 4,000
Total accumulated amortization | (4,000) | (4,000)
Trade Names and Trademarks [Member] |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Total intangible assets | 900 | 900
Total accumulated amortization | $ (900) | $ (900)

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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