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Disaggregation of revenue (Tables)
 12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
Disclosure of disaggregation of revenue from contracts with customers [text block]
In the following table, revenue is disaggregated by geographical market, by market application, and by timing of revenue recognition.

 
December 31,

December 31,

 
2018

2017

Geographical markets
 
 
China
$
30,791

$
76,558

Europe
37,590

26,145

North America
23,871

15,425

Other
4,334

3,160

 
$
96,586

$
121,288

Market application
 
 
Heavy Duty Motive
39,464

63,684

Portable Power
7,109

4,468

Material Handling
8,010

7,535

Back Up Power
2,426

1,933

Technology Solutions
39,577

43,668

 
$
96,586

$
121,288

Timing of revenue recognition
 
 
Products transferred at a point in time
53,729

73,840

Products and services transferred over time
42,857

47,448

 
$
96,586

$
121,288