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Intangible Assets - Schedule of Acquired Intangible Assets by Major Asset Class (Detail) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 882 | $ 1,353
Accumulated amortization | (331) | (197)
Net book value before impairment |  | 1,156
Impairment charge |  | (411)
Net book value | 551 | 745
Purchased Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 265 | 265
Accumulated amortization | (66) | (32)
Net book value before impairment |  | 233
Net book value | $ 199 | 233
Purchased Technology [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 5 years |
Purchased Technology [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 6 years |
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 528 | 999
Accumulated amortization | (220) | (147)
Net book value before impairment |  | 852
Impairment charge |  | (411)
Net book value | $ 308 | 441
Customer Relationships [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 3 years |
Customer Relationships [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 6 years |
Trademarks/Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 2 years |
Gross | $ 38 | 38
Accumulated amortization | (24) | (9)
Net book value before impairment |  | 29
Net book value | $ 14 | 29
Non-Compete [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 3 years |
Gross | $ 51 | 51
Accumulated amortization | (21) | (9)
Net book value before impairment |  | 42
Net book value | $ 30 | $ 42

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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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/presentationRef -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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