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Segment Reporting and Significant Customer Information - Assets by Segment (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Revenue for each segment recognized based on customer location |  |
Long-lived assets | $ 4,528 | $ 4,921
Total assets | 45,646 | 45,672
Elimination |  |
Revenue for each segment recognized based on customer location |  |
Long-lived assets | 0 | 0
Total assets | (80,205) | (72,864)
Asia Pacific | Operating Segments |  |
Revenue for each segment recognized based on customer location |  |
Long-lived assets | 163 | 140
Total assets | 4,771 | 3,697
Europe | Operating Segments |  |
Revenue for each segment recognized based on customer location |  |
Long-lived assets | 376 | 496
Total assets | 55,426 | 54,593
North America | Operating Segments |  |
Revenue for each segment recognized based on customer location |  |
Long-lived assets | 3,989 | 4,285
Total assets | $ 65,654 | $ 60,246

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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