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Revenue from Contracts with Customers by Geographic Region (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Concentration Risk [Line Items] |  |  |  |
Revenue | $ 47,731 | $ 32,455 | $ 92,561 | $ 63,045
North America |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Revenue | 22,481 | 12,437 | 42,491 | 24,089
Europe |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Revenue | 19,578 | 16,155 | 39,148 | 32,562
Asia and Australia |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Revenue | 5,617 | 3,604 | 10,692 | 5,926
Other |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Revenue | $ 55 | $ 259 | $ 230 | $ 468

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 + Details
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