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Business Combination - Summary of Fair Values of Assets Acquired and Liabilities Assumed as of Acquisition Date (Detail) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017 | Jan. 20, 2017
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Business Acquisition [Line Items] |  |  |
Goodwill | $ 12,005 | $ 12,005 |
Conexio [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Inventory |  |  | $ 1,040
Property, plant and equipment |  |  | 97
Intangible assets |  |  | 155
Goodwill |  |  | 85
Assumed liabilities |  |  | (82)
Total acquisition consideration |  |  | $ 1,295

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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 Amount of liabilities assumed 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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