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Disaggregation of revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ 96,586 | $ 121,288
Products transferred at a point in time |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 53,729 | 73,840
Products and services transferred over time |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 42,857 | 47,448
Heavy Duty Motive |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 39,464 | 63,684
Portable Power |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 7,109 | 4,468
Material Handling |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 8,010 | 7,535
Back Up Power |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,426 | 1,933
Technology Solutions |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 39,577 | 43,668
China |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 30,791 | 76,558
Europe |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 37,590 | 26,145
North America |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 23,871 | 15,425
Other |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ 4,334 | $ 3,160

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 15 -IssueDate 2017-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=15&date=2017-03-01&anchor=para_113_a&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 15 -IssueDate 2017-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=15&date=2017-03-01&anchor=para_114&doctype=Standard -URIDate 2017-03-09 + Details
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