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Revenue - Disaggregated by Geographic Region (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 USD ($) region | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) region | Sep. 30, 2018 USD ($)
Disaggregation of Revenue |  |  |  |
Number of primary geographic regions | region | 3 |  | 3 |
Revenue | $ 9,178 | $ 11,518 | $ 27,850 | $ 37,136
North America |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | 1,527 | 2,104 | 7,244 | 6,214
EMEA |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | 2,048 | 2,749 | 6,776 | 7,896
APJ |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | $ 5,603 | $ 6,665 | $ 13,830 | $ 23,026

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- Definition Amount, excluding 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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