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Business Combination - Schedule of Estimated Fair Values of Assets acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 16, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2017
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | $ 10,012 |  | $ 3,014
Customer relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Amortization Period |  | 3 years 9 months 18 days |  | 6 years
ICAR Vision Systems, S.L. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Current assets | $ 2,036 |  |  |
Property, plant, and equipment | 83 |  |  |
Intangible assets | 6,407 |  |  |
Goodwill | 6,852 |  |  |
Other non-current assets | 87 |  |  |
Current liabilities | (1,568) |  |  |
Other non-current liabilities | (2,430) |  |  |
Net assets acquired | 11,467 |  |  |
Finite-lived intangible assets acquired | 6,407 |  |  |
Pro forma revenue |  | $ 13,043 | $ 10,240 |
Pro forma net loss |  | $ (5,110) | $ (780) |
ICAR Vision Systems, S.L. | Completed technologies |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Amortization Period |  | 5 years |  |
Finite-lived intangible assets acquired | 4,956 |  |  |
ICAR Vision Systems, S.L. | Customer relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Amortization Period |  | 2 years |  |
Finite-lived intangible assets acquired | 1,298 |  |  |
ICAR Vision Systems, S.L. | Trade names |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Amortization Period |  | 3 years |  |
Finite-lived intangible assets acquired | $ 153 |  |  |

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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464 + Details
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